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2026

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Articles 3961 - 3990 of 5249

Full-Text Articles in Engineering

Hybrid Data-Driven Cement-Stabilized Soil Design: An Integration Of Machine Learning, Multi-Objective Optimization, And Life Cycle Assessment, Chikezie Chimere Onyekwena, Yunli Li, Ikenna J. Okeke, Ubani Obinna Uzodimma, Monday Uchenna Okoronkwo, Wenping Wu Feb 2026

Hybrid Data-Driven Cement-Stabilized Soil Design: An Integration Of Machine Learning, Multi-Objective Optimization, And Life Cycle Assessment, Chikezie Chimere Onyekwena, Yunli Li, Ikenna J. Okeke, Ubani Obinna Uzodimma, Monday Uchenna Okoronkwo, Wenping Wu

Chemical and Biochemical Engineering Faculty Research & Creative Works

Soil stabilization is crucial in geotechnical engineering, yet conventional methods are often time-consuming, resource-intensive, and environmentally unsustainable. Despite growing interest in Machine Learning (ML) and optimization tools for mix design, few studies integrate these methods with decision-making techniques and environmental assessment to support practical implementation. This study proposes a hybrid data-driven framework for predicting strength, optimizing mix compositions, and evaluating environmental impacts via life cycle assessment of cement-stabilized soft soils. Six ML models were evaluated, and the top-performing eXtreme Gradient Boosting (XGB) model was further improved using the Grey Wolf Optimizer (GWO). The optimized XGB-GWO model, integrated with a polynomial …

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Nanocatalytic Enhancement Of Local Heat Transfer In Continuous-Flow Thermal Reactors, Nasser Zouli, Nujud Maslamani, Ayman Yousef, Muthanna H. Al-Dahhan Feb 2026

Nanocatalytic Enhancement Of Local Heat Transfer In Continuous-Flow Thermal Reactors, Nasser Zouli, Nujud Maslamani, Ayman Yousef, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

An experimental investigation was conducted to evaluate the thermal conductivity (TC) and local heat-transfer coefficients (LHTCs) of nanofluids containing alumina (Al2O3), hematite (Fe2O3), and copper oxide (CuO) nanoparticles dispersed in deionized water. A newly developed non-invasive LHTC probe was integrated into the inner wall of the test section to enable direct quantification of interfacial heat-transfer performance. The measurements were conducted under laminar and turbulent flow conditons across Reynolds numbers ranging from 1000 to 10,000. The selected nanoparticles were chosen based on their high intrinsic thermal conductivity, cost effectiveness, and, in the case …

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Generative Artificial Intelligence In Aircraft Design Optimization, Xiaosong Du Feb 2026

Generative Artificial Intelligence In Aircraft Design Optimization, Xiaosong Du

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Aircraft design optimization is essential for improving aircraft performance (such as reduced fuel consumption and lowered noise), which leads to more efficient, sustainable, and affordable aircraft. Conventional aircraft design adopts physics-based simulation models, but iteratively evaluating simulation models is computationally intensive, or even practically impossible. Meanwhile, artificial intelligence (AI) emerges as a revolutionary game changer in the modern engineering industry, including aircraft design optimization. Generative AI (genAI), one of the groundbreaking AI methods, has been advancing aircraft design optimization from various aspects, including intelligent parameterization, predictive modeling, training facilitation, and constraints handling. However, there is a lack of a review …

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Advances And Challenges In Nano-Modified Cementitious Composites: Mechanisms, Dispersion Strategies, And Impact On Mechanical Properties, Fatemeh Mohammadi Ghahsareh, Pengwei Guo, Nusrath Jaha, Yi Bao, Kamal H. Khayat, Weina Meng Feb 2026

Advances And Challenges In Nano-Modified Cementitious Composites: Mechanisms, Dispersion Strategies, And Impact On Mechanical Properties, Fatemeh Mohammadi Ghahsareh, Pengwei Guo, Nusrath Jaha, Yi Bao, Kamal H. Khayat, Weina Meng

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Nanomaterials are increasingly utilized to enhance the mechanical properties, durability, and functionality of concrete materials but face challenges such as agglomeration and uneven dispersion in cementitious systems, which can offset the intended improvements. This paper reviews the advances and challenges associated with nano-modified cementitious composites, elucidating fundamental mechanisms and highlighting strategies for overcoming the challenges through experimental and computing techniques. The reviewed contents include (1) the classification of nanomaterials commonly used in cementitious systems and the mechanisms through which they enhance the mechanical properties of cementitious composites; (2) challenges of nanomaterials such as agglomeration in water, re-agglomeration in cementitious systems, …

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Fiscal Year 2023 Fhwa-536 Report For The Kentucky Transportation Cabinet, Doug Kreis, Candice Wallace, Bryan Gibson, Sarah Mccormack Feb 2026

Fiscal Year 2023 Fhwa-536 Report For The Kentucky Transportation Cabinet, Doug Kreis, Candice Wallace, Bryan Gibson, Sarah Mccormack

Kentucky Transportation Center Research Report

Every other year, the Federal Highway Administration (FHWA) requires that states submit a Local Highway Finance Report (FHWA-536) to the agency. This report summarizes data on local highway finances and is used by FHWA to evaluate relationships between and changes in revenues, expenditures and investment patterns, and financial trends. This report presents information submitted by Kentucky in its fiscal year (FY) 2023 FHWA-536. Total receipts from local, state, and federal sources used for road and street infrastructure equaled approximately $1.11 billion. Local sources of funding accounted for the largest share of total receipts (47%), followed by state government sources (45%), …

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Kytc Digital Project Delivery Phase 1 Summary, Rachel Catchings Feb 2026

Kytc Digital Project Delivery Phase 1 Summary, Rachel Catchings

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet (KYTC) launched its Digital Project Delivery (DPD) Initiative in September 2020 with the goal of expanding the use of digitally formatted plan and project information throughout the transportation asset life cycle, from project delivery through asset management. KYTC retained Kentucky Transportation Center (KTC) staff with expertise in construction and design to facilitate DPD implementation. This document summarizes DPD-related efforts undertaken by the Cabinet over the past five years. Key activities completed during this period include a survey of Kentucky Association of Highway Contractors members to document their perspectives on design file usage and preferences, coordinating multiple …

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Zirconium And Hafnium Interdiffusion Study In Zrb2–Hfb2 System, Yue Zhou, Ana C. Feltrin, William G. Fahrenholtz, Gregory E. Hilmas Feb 2026

Zirconium And Hafnium Interdiffusion Study In Zrb2–Hfb2 System, Yue Zhou, Ana C. Feltrin, William G. Fahrenholtz, Gregory E. Hilmas

Materials Science and Engineering Faculty Research & Creative Works

Interdiffusion of Zr and Hf in the diboride system was investigated. High-purity zirconium diboride (ZrB2) and hafnium diboride (HfB2) were prepared by a combination of boro-/carbothermal reduction synthesis and densification by spark plasma sintering. The bulk ceramics had relative densities of 99.3% for ZrB2 and 99.7% for HfB2, and both ceramics were phase-pure by x-ray diffraction analysis. Diffusion couples of ZrB2 and HfB2 were annealed at temperatures ranging from 2000°C to 2200°C for times from 4 to 12 h. Zr and Hf elemental concentration profiles were measured using energy dispersive spectroscopy …

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Hold Paramount The Health, Safety, And Welfare Of The Public And The Planet, Daniel B. Oerther Feb 2026

Hold Paramount The Health, Safety, And Welfare Of The Public And The Planet, Daniel B. Oerther

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

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Tip Penetration Test For Rapid In-Line Assessment Of Static Yield Stress During 3d Concrete Printing Process, Ali Fasihi, Nicolas A. Libre Feb 2026

Tip Penetration Test For Rapid In-Line Assessment Of Static Yield Stress During 3d Concrete Printing Process, Ali Fasihi, Nicolas A. Libre

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The static yield stress of printable cementitious materials is a critical parameter governing the shape stability and buildability of 3D printed concrete structures. Among various testing techniques, the penetration test has emerged as a promising method for in-situ measurement of static yield stress during printing process. However, the applicability of the penetration test for in-line monitoring of static yield stress remains limited due to the necessity for substantial material thickness. To address this challenge, this study proposes a novel tip penetration test, which enables static yield stress determination without the requirement for full cone submergence, thereby facilitating assessment of thin …

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Rheological And Micro Properties Of High-Viscosity Binder-Incorporated Polyphosphoric Acid And Rock Asphalt, Feng Ma, Xinye Jiang, Zhen Fu, Chongxin Zhu, Jenny Liu, Ke Shi, Yalu Wen, Yao Zhang Feb 2026

Rheological And Micro Properties Of High-Viscosity Binder-Incorporated Polyphosphoric Acid And Rock Asphalt, Feng Ma, Xinye Jiang, Zhen Fu, Chongxin Zhu, Jenny Liu, Ke Shi, Yalu Wen, Yao Zhang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

To enhance the performance of high-viscosity modified asphalt (HVMA), polyphosphoric acid (PPA) and North American rock asphalt (NA-RA) were incorporated into styrene-butadiene-styrene (SBS)/crumb rubber (CR) composite modified asphalt, resulting in two distinct types of HVMA. The two HVMA types were evaluated at various dosages using a dynamic shear rheometer (DSR), bending beam rheometer (BBR), fluorescence microscope (FM), and Fourier infrared spectroscopy (FT-IR) tests. These tests provided both macroscopic and microscopic insights into their properties. The findings indicated that both PPA and NA-RA modify the asphalt's internal structure, enhancing its temperature resistance. PPA primarily improved high-Temperature performance, while NA-RA enhanced low-Temperature …

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A Rapid Field Moisture Measurement Unit For Compaction Acceptance Of Unbound Materials, Chuanjun Liu, Xiong Zhang, Jenny Liu Feb 2026

A Rapid Field Moisture Measurement Unit For Compaction Acceptance Of Unbound Materials, Chuanjun Liu, Xiong Zhang, Jenny Liu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The moisture content (MC) was a critical parameter that needed to be monitored in geomaterial compaction. Nuclear density gauges (NDGs) had been the practice in MC and density measurement for decades but had become less desirable due to cost, regulatory, and safety concerns. Meanwhile, lightweight deflectometers (LWDs), proposed as an alternative to NDGs, did not have a function of MC measurement. This study aimed to identify a rapid field moisture analyzer to work with LWDs for evaluating the compaction acceptance of unbound materials in situ. The study started with evaluating the effectiveness and practicability of two existing moisture analyzers recommended …

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Influence Of Wicking Geotextile Installation On Moisture Migration In Silt Under Rainfall Infiltration, Yipeng Guo, Dahao Zou, Min Hu, Xiong Zhang, Fang Xu, Yongjie Zhang, Jiejing Chen Feb 2026

Influence Of Wicking Geotextile Installation On Moisture Migration In Silt Under Rainfall Infiltration, Yipeng Guo, Dahao Zou, Min Hu, Xiong Zhang, Fang Xu, Yongjie Zhang, Jiejing Chen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Silt is widely used in subgrade construction in the middle and lower reaches of the Yellow River in China due to limited availability of high-quality fill. However, its high moisture sensitivity and low strength often lead to pumping, settlement, and deformation. This study investigates the hydraulic performance of a wicking geotextile in silt under simulated rainfall infiltration using one-dimensional soil column experiments. Three installation configurations were evaluated: (i) a control sample (CS) without geotextile, (ii) an embedded sample (ES) with the geotextile fully installed as a capillary barrier, and (iii) a surface-exposed sample (SES) with the geotextile extended to the …

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Afit By The Numbers, Fy25, Air Force Institute Of Technology Feb 2026

Afit By The Numbers, Fy25, Air Force Institute Of Technology

AFIT Documents

AFIT’s mission is to educate defense professionals to innovatively accomplish the deterrence and warfighting missions of the USAF and USSF. AFIT’s vision of leading defense-focused education, research and consultation to accelerate military superiority across all domains is accomplished through operationally relevant advanced academic education, research, and professional continuing education.

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Kentucky Cdl Adjudication Pilot And Compliance Needs Study, Jeeyen Koo, Andrew Martin, Jennifer Walton Feb 2026

Kentucky Cdl Adjudication Pilot And Compliance Needs Study, Jeeyen Koo, Andrew Martin, Jennifer Walton

Kentucky Transportation Center Research Report

This report examines trends in how Kentucky District Courts have adjudicated charges related to commercial driver’s license (CDL) and commercial motor vehicles (CMVs). Using court data, researchers evaluated historical patterns in charge filing volumes as well as conviction, dismissal, amendment, and diversion rates. Between 2002 and 2024, conviction rates declined and dismissals increased. Convictions peaked in the mid-70% range in the early 2000s, but fell to the mid-50% range by 2024. Speeding and other serious traffic violations — many of which are advanceable offenses — were dismissed or amended at rates that could have substantively affected the integrity of CDL …

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Fiscal Year 2024 Fhwa-536 Report For The Kentucky Transportation Cabinet, Doug Kreis, Candice Wallace, Bryan Gibson, Sarah Mccormack Feb 2026

Fiscal Year 2024 Fhwa-536 Report For The Kentucky Transportation Cabinet, Doug Kreis, Candice Wallace, Bryan Gibson, Sarah Mccormack

Kentucky Transportation Center Research Report

Every other year, the Federal Highway Administration (FHWA) requires that states submit a Local Highway Finance Report (FHWA-536) to the agency. This report summarizes data on local highway finances and is used by FHWA to evaluate relationships between and changes in revenues, expenditures and investment patterns, and financial trends. This report presents information submitted by Kentucky in its fiscal year (FY) 2024 FHWA-536. Total receipts from local, state, and federal sources used for road and street infrastructure equaled approximately $1.27 billion. Local sources of funding accounted for the largest share of total receipts (50%), followed by state government sources (41%), …

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Manufacturing And Material Property Verification Of Short Fiber Particle Reinforced Composites, Megan Elise Howell Feb 2026

Manufacturing And Material Property Verification Of Short Fiber Particle Reinforced Composites, Megan Elise Howell

Graduate Theses - Mechanical Engineering

This thesis investigates the manufacturing, testing, and material property verification of short fiber and particle reinforced polymer composites intended for use in flywheel energy storage systems. Composite tensile specimens were fabricated using controlled mold geometries and autoclave-assisted curing to improve consolidation quality and reduce void content. Short carbon fibers and particulate reinforcements were selected to balance mechanical performance, manufacturability, and isotropy for high-speed rotor applications. Tensile testing was performed using a tensile testing machine, and machine compliance effects were quantified and removed to obtain accurate elastic moduli. Experimental results were compared against analytical micromechanics predictions to evaluate stiffness trends and …

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Coe Annual Technical Review 2025, Jianshun Zhang, Bing Dong Feb 2026

Coe Annual Technical Review 2025, Jianshun Zhang, Bing Dong

SyracuseCoE

No abstract provided.

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Inclusion Engineering Through Deoxidation Practice Optimization For Enhanced Mechanical Properties Of Cast Cr-Ni-Mo Steel, Kingsley T. Amatanweze, Viraj A. Athavale, Simon Lekakh, Ronald J. O'Malley, Laura N. Bartlett Feb 2026

Inclusion Engineering Through Deoxidation Practice Optimization For Enhanced Mechanical Properties Of Cast Cr-Ni-Mo Steel, Kingsley T. Amatanweze, Viraj A. Athavale, Simon Lekakh, Ronald J. O'Malley, Laura N. Bartlett

Materials Science and Engineering Faculty Research & Creative Works

Deoxidation is an integral part of steelmaking, as it determines steel castability, cleanliness, and porosity levels of the final product. Steel quality is critical to its performance and can be sabotaged by impurities such as non-metallic inclusions and porosity. This study investigates the effects of four distinct deoxidation practices, using Al, Al-Ca, Zr-Ca, and Mn-Si respectively, on tensile strength, tensile ductility and impact toughness of a Cr-Ni-Mo steel. These deoxidation reactions were modeled on a commercially available thermodynamic software and possible inclusion product phases were predicted. The casting samples were studied on a scanning electron microscope (SEM) utilizing energy dispersive …

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Rapid Flood Inundation Mapping For Dam Failure And Operations, Shivakumar Balachandran, Parvaneh Nikrou, Ayman Mokhtar Nemnem, Reza Saleh Alipour, Sagy Cohen, Xingong Li, Erfan Goharian, Jasim Imran Feb 2026

Rapid Flood Inundation Mapping For Dam Failure And Operations, Shivakumar Balachandran, Parvaneh Nikrou, Ayman Mokhtar Nemnem, Reza Saleh Alipour, Sagy Cohen, Xingong Li, Erfan Goharian, Jasim Imran

Faculty Publications

Dam failure often causes catastrophic flooding. Although conventional hydrodynamic models are available for generating flood inundation maps, there is a need for low-complexity models that can provide rapid inundation estimates during emergency situations. Operational releases of large volumes may also lead to downstream flooding. This study utilizes two DEM-based models, OWP HAND-FIM and FLDPLN, to produce flood inundation maps for near-real-time operational applications. Three dam-related scenarios, including failures and controlled operations, are examined using these simplified models for the Fall River Dam in Kansas. Breach flows are estimated using empirical relationships, and discharge attenuation is calculated using an analytical approach. …

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Characterization Of Sediment Loads And Size Distribution In Nebraska Roadway Runoff, Bruce I. Dvorak, David M. Admiraal, Pavel Shrestha Feb 2026

Characterization Of Sediment Loads And Size Distribution In Nebraska Roadway Runoff, Bruce I. Dvorak, David M. Admiraal, Pavel Shrestha

Nebraska Department of Transportation: Research Reports

The Nebraska Department of Transportation (NDOT) must manage sediment, and pollutant loads from roadway runoff to meet stormwater regulations. The SAFL Baffle, a hydrodynamic separator used by NDOT, depends on reliable estimates of total suspended solids (TSS) and particle size distribution (PSD). However, limited data exists for Nebraska roadways. In this study stormwater runoff was monitored at four NDOT-maintained sites, two in Lincoln and two in Beatrice, over 1.5 years to characterize TSS and PSD and to evaluate SAFL Baffle performance using the SHSAM model. Results showed large variability across sites and seasons. Median TSS ranged from 158 to 580 …

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A Runtime-Adaptive Transformer Neural Network Accelerator On Fpgas, Ehsan Kabir, Jason D. Bakos, David Andrews, Miaoqing Huang Feb 2026

A Runtime-Adaptive Transformer Neural Network Accelerator On Fpgas, Ehsan Kabir, Jason D. Bakos, David Andrews, Miaoqing Huang

Electrical Engineering and Computer Science Faculty Publications and Presentations

Transformer neural networks (TNN) excel in natural language processing (NLP), machine translation, and computer vision (CV) without relying on recurrent or convolutional layers. However, they have high computational and memory demands, particularly on resource constrained devices like FPGAs. Moreover, transformer models vary in processing time across applications, requiring custom models with specific parameters. Designing custom accelerators for each model is complex and time-intensive. Some custom accelerators exist with no runtime adaptability, and they often rely on sparse matrices to reduce latency. However, hardware designs become more challenging due to the need for application-specific sparsity patterns. This paper introduces ADAPTOR, a …

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Optical Fiber Sensors Using Vernier Effect In Cascaded Fiber Interferometers, Zhouchen Wang Feb 2026

Optical Fiber Sensors Using Vernier Effect In Cascaded Fiber Interferometers, Zhouchen Wang

Dissertations

The optical Vernier effect has emerged as a powerful tool to enhance the sensitivity of optical fiber interferometer-based sensors, opening new opportunities for developing highly sensitive fiber sensing systems. Optical fiber interferometric sensors based on the Vernier effect are widely used for various applications due to their ultra-compact size, high sensitivity, immunity to electromagnetic interference, electrical isolation, resistance to harsh environments, flexibility, multiplexing capability, and remote operation. The aim of this doctoral thesis was to gain a deeper fundamental understanding of the Vernier effect in optical fiber structures and to develop and investigate a series of novel Vernier effect optical …

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The Role Of Spatial Abilities In Stem Learning And The Influence Of Individual Differences, Styliani Malkogeorgou Feb 2026

The Role Of Spatial Abilities In Stem Learning And The Influence Of Individual Differences, Styliani Malkogeorgou

Masters

Students’ decisions to pursue education and careers in Science, Technology, Engineering, and Mathematics (STEM) are shaped by an interplay of cognitive, social, and motivational factors. Spatial ability is among the most reliable predictors of STEM success, yet less is known about how it relates to students’ STEM attitudes and aspirations, and whether visuospatial working memory (VSWM) explains this relationship. This study tested the hypotheses that (a) stronger spatial abilities and VSWM would be associated with more positive STEM attitudes and stronger STEM aspirations, and (b) VSWM would mediate the relationship between spatial abilities and STEM attitudes/aspirations, while examining the influence …

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Performance And Mechanistic Insights Into Cement Systems Modified With Wastewater-Recovered Struvite, Ugochukwu Ewuzie, Rupack R. Halder, Abdulkareem O. Yusuf, Abiodun A. Saka, Godwin I. Ogbuehi, Titus C. Egbosiuba, Damilola A. Daramola, Monday Uchenna Okoronkwo Feb 2026

Performance And Mechanistic Insights Into Cement Systems Modified With Wastewater-Recovered Struvite, Ugochukwu Ewuzie, Rupack R. Halder, Abdulkareem O. Yusuf, Abiodun A. Saka, Godwin I. Ogbuehi, Titus C. Egbosiuba, Damilola A. Daramola, Monday Uchenna Okoronkwo

Chemical and Biochemical Engineering Faculty Research & Creative Works

Struvite, the stable hydration product and primary strength phase in magnesium ammonium phosphate cement (MAPC), derived from wastewater treatment, has recently been utilized as a sustainable additive to Portland cement (PC). However, its impacts on cement hydration kinetics, pore refinement, rheology, and the mechanisms underlying these processes have not been comprehensively studied. This study developed Portland cement-struvite (PCS) systems by replacing PC with 3–20 % struvite (ST wt.%: PCS3–PCS20) and evaluated these processes using isothermal calorimetry, 3D micro-computed tomography (μXCT), time-dependent rheometry, X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR), and the Krstulović-Dabić (K-D) model. The FTIR/XRD confirmed the coexistence …

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Artificial Neural Network Model For Predicting Fatigue Endurance Limit Of Hot Mix Asphalt Using Uniaxial Tension–Compression Tests, Prashanta Kumar Acharjee, Mayzan Isied, Mena I. Souliman, Sameer Jung Karkl, Tanvir Ahmed, Gokhan Saygili Feb 2026

Artificial Neural Network Model For Predicting Fatigue Endurance Limit Of Hot Mix Asphalt Using Uniaxial Tension–Compression Tests, Prashanta Kumar Acharjee, Mayzan Isied, Mena I. Souliman, Sameer Jung Karkl, Tanvir Ahmed, Gokhan Saygili

Civil Engineering Faculty Publications and Presentations

Fatigue is one of the major distresses occurring in asphalt concrete pavement. Repeated traffic loading causes escalated structural damage which results in the formation of cracks. There is a strain level below which the Hot Mix Asphalt goes under fatigue failure, and it is called endurance limit. In this study, a predictive model is developed to predict endurance limit strain values by using artificial neural network. Uniaxial tension-compression fatigue test results conducted under NCHRP Project 9–44 A were utilized in the model development process. An equation is also extracted from the model along which gives the exact values as the …

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City Farm Slo Sheep Shed Concrete Slab Installation, Jake Simkins, Elijah Burt, Finnbarr Kelly Feb 2026

City Farm Slo Sheep Shed Concrete Slab Installation, Jake Simkins, Elijah Burt, Finnbarr Kelly

Construction Management

The City Farm SLO Sheep Shed Foundation Slab project, undertaken by California Polytechnic State University, San Luis Obispo Construction Management students, aimed to improve the structural integrity and longevity of an existing livestock shelter at City Farm SLO. Initiated in coordination with Shane Lovell, owner and operator of City Farm SLO, and guided by Construction Management faculty member Mark Montoya, the project integrated community service with practical application of structural concrete construction principles. The scope involved temporarily removing an existing sheep shed from within an active livestock pen, preparing subgrade in muddy winter conditions, and constructing a reinforced 5-inch, 4500 …

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Integrated Computational And Experimental Investigation Of Groups V And Vi Metals In (M,Hf,Ti,Zr)B2-(M,Hf,Ti,Zr)C Ceramics, Ana C. Feltrin, Simon Divilov, Gregory E. Hilmas, Stefano Curtarolo, William G. Fahrenholtz Feb 2026

Integrated Computational And Experimental Investigation Of Groups V And Vi Metals In (M,Hf,Ti,Zr)B2-(M,Hf,Ti,Zr)C Ceramics, Ana C. Feltrin, Simon Divilov, Gregory E. Hilmas, Stefano Curtarolo, William G. Fahrenholtz

Materials Science and Engineering Faculty Research & Creative Works

Dual-phase compositionally complex ultra-high temperature ceramics were formulated by incorporating different Groups V and VI metals such as V, Nb, Ta, Cr, Mo, or W into a base composition containing the Group IV elements, Hf, Ti, and Zr. Metal distribution was predicted using first-principles-based thermodynamics simulations and compared with experimental results. Moreover, phase stability, microstructure, and mechanical properties were evaluated for all of the ceramics. Compositions containing Cr, V, Nb, or Ta formed dual-phase ceramics containing only one boride and one carbide phase, while compositions containing Mo or W developed an additional third phase. The experimental metal distribution trends generally …

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Co-Calcination Of Limestone And Clay Enhances The Performance Of Limestone Calcined Clay Cement (Lc3), Oluwadamilare Charles Adesina, Sahil Surehali, Avinaya Tripathi, Kayla Lauren Lee, Bryan K. Aylas-Paredes, Aditya Kumar, Narayanan Neithalath Feb 2026

Co-Calcination Of Limestone And Clay Enhances The Performance Of Limestone Calcined Clay Cement (Lc3), Oluwadamilare Charles Adesina, Sahil Surehali, Avinaya Tripathi, Kayla Lauren Lee, Bryan K. Aylas-Paredes, Aditya Kumar, Narayanan Neithalath

Materials Science and Engineering Faculty Research & Creative Works

Limestone-calcined clay cements (LC3) reduce the environmental impact of cement production and accelerate the industry transition toward carbon neutrality. While conventional LC3 with 50% clinker replacement (LC3-50) demonstrate long-term performance comparable to ordinary Portland cement (OPC) in concrete, early-age performance is generally compromised. This study explores for the first time, joint thermal treatment—that is, co-calcination—of limestone (LS) and bulk kaolinitic clay in mass ratios of 1:1 to 1:4 under a calcination regime specifically designed to ensure activation of the clay mineral. The co-calcination converts a small fraction of LS to metastable CaO, thus providing an …

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Post-Calcium Treatment Evolution Of Alumina (Al2o3) Inclusions Morphology, Naziru I. Fuseini, Ronald J. O'Malley, Todd P. Sander, Jeffrey D. Smith, Haiming Wen, Laura N. Bartlett Feb 2026

Post-Calcium Treatment Evolution Of Alumina (Al2o3) Inclusions Morphology, Naziru I. Fuseini, Ronald J. O'Malley, Todd P. Sander, Jeffrey D. Smith, Haiming Wen, Laura N. Bartlett

Materials Science and Engineering Faculty Research & Creative Works

The post-calcium morphological evolution of Al2O3 inclusions formed under high-oxygen supersaturation (~1000 ppm) was investigated through time-resolved sampling and quenching of aluminum-killed, calcium-treated steel. SEM-EDS analysis revealed the formation of angular two-phase CaO·Al2O3–CaS inclusions within 1 minute, gradually transforming into spherical liquid 12CaO·7Al2O3 and CaO·Al2O3 with a thin CaS layer around it. The 3D morphology of the CaS phase of the complex CaO·Al2O3–CaS inclusions observed at 1 minute appeared as a cone-cap attached to the partially modified CaO·Al2O3. This …

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Thermodynamic Analysis Of Metal Segregation In Two Metal Boride-Carbide Ceramics Containing V With Cr, Hf, Ti, Or Zr, Ana C. Feltrin, Simon Divilov, Gregory E. Hilmas, Stefano Curtarolo, William G. Fahrenholtz Feb 2026

Thermodynamic Analysis Of Metal Segregation In Two Metal Boride-Carbide Ceramics Containing V With Cr, Hf, Ti, Or Zr, Ana C. Feltrin, Simon Divilov, Gregory E. Hilmas, Stefano Curtarolo, William G. Fahrenholtz

Materials Science and Engineering Faculty Research & Creative Works

Dual-phase carbide-boride ceramics in different vanadium-Me (Me = Cr, Hf, Ti, and Zr) binary systems were synthesized by boro/carbothermal reduction under stoichiometric and carbon-deficient conditions and densified by spark plasma sintering. Thermodynamic analysis was used to evaluate the influence of composition on the phase stability and metal segregation between phases, along with the resulting effects on microstructure and hardness. Pairing vanadium with Group IV elements (Hf, Ti, and Zr) consistently formed one boride and one carbide phase, while the Cr-V system formed a monoboride phase and a carbon-deficient carbide. Metal segregation trends depended on composition. Vanadium preferentially segregated to the …

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