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Articles 1 - 15 of 15
Full-Text Articles in Engineering
Capacitive Properties And Structure Of Ruo₂-Hfo₂ Films Prepared By Thermal Decomposition Method, Xuehua Liu, Junqiu Zhu, Xin Wang, Jinghua Sun, Zhongzhi Tang, Teng Zhang, Matthew O'Keefe, Dian Tang
Capacitive Properties And Structure Of Ruo₂-Hfo₂ Films Prepared By Thermal Decomposition Method, Xuehua Liu, Junqiu Zhu, Xin Wang, Jinghua Sun, Zhongzhi Tang, Teng Zhang, Matthew O'Keefe, Dian Tang
Materials Science and Engineering Faculty Research & Creative Works
Binary RuO2-HfO2 films on Ti substrates were prepared by a thermal decomposition method. cyclic voltammetric and charge/discharge properties of the RuO2-HfO2 electrodes were characterized. It was determined that the incorporation of HfO2 into RuO 2 greatly improved the capacitive properties of the material. The RuO2-HfO2 electrodes showed excellent cyclic stability, with no decay in charge capability during 1000 CV cycles in acidic solution. A nominal content of 50 mol% RuO2 and 50 mol% HfO2 gave the highest specific capacitance of 789.3 F/g (RuO2). The excellent capacitive …
Wound Care, Steven B. Jung, D. E. Day
Wound Care, Steven B. Jung, D. E. Day
Materials Science and Engineering Faculty Research & Creative Works
A method for treating a wound, and a dressing for wound care management comprising a three-dimensional body of glass-based fibers comprising one or more glass-formers selected from the group consisting of P2O5, SiO2, and B2O3; at least about 25 wt % of the fibers have a diameter between about 200 nm and about 4000 nm, and a length:width aspect ratio of at least about 10. In another form, the glasses are in the form of particles in an ointment or cream applied to a wound. In yet other forms the glasses are …
Quantum Computing Circuits, Cheng-Hsiao Wu, Casey Andrew Cain
Quantum Computing Circuits, Cheng-Hsiao Wu, Casey Andrew Cain
Electrical and Computer Engineering Faculty Research & Creative Works
A system for performing digital operations, including a first device configured to transform a digital input into one or more signals, at least one AB ring, the at least one AB ring irreducibly-coupled and configured to include at least three terminals, a second device configured to read a portion of a signal expressed upon two or more of the at least three terminals, and a third device configured to transform the portion of the signal expressed upon two or more of the at least three terminals into a digital output, the third device operationally connected to the second device.
Comment On "Giant Plasticity Of A Quantum Crystal", Caizhi Zhou, Charles J. Olson Reichhardt, Matthias J. Graf, Jungjung Su, Alexander V. Balatsky, Irene J. Beyerlein
Comment On "Giant Plasticity Of A Quantum Crystal", Caizhi Zhou, Charles J. Olson Reichhardt, Matthias J. Graf, Jungjung Su, Alexander V. Balatsky, Irene J. Beyerlein
Materials Science and Engineering Faculty Research & Creative Works
In their Letter, Haziot et al. report a novel phenomenon of giant plasticity for hcp 4He quantum crystals. They assert that 4He exhibits mechanical properties not found in classical plasticity theory. Specifically, they examine high-quality crystals as a function of temperature T and applied strain ϵapp, where the shear modulus µ =Tapp/ϵapp reaches a plateau and dissipation 1=Q becomes close to zero; both quantities are reported to be independent of applied stress Tapp and strain ϵapp, implying a reversible dissipation process and suggesting dislocation motion by quantum tunneling. At lower …
Probabilistic Simulation Of Solidification Microstructure Evolution During Laser-Based Metal Deposition, Jingwei Zhang, Frank W. Liou, William Seufzer, Joseph William Newkirk, Zhiqiang Fan, Heng Liu, Todd E. Sparks
Probabilistic Simulation Of Solidification Microstructure Evolution During Laser-Based Metal Deposition, Jingwei Zhang, Frank W. Liou, William Seufzer, Joseph William Newkirk, Zhiqiang Fan, Heng Liu, Todd E. Sparks
Mechanical and Aerospace Engineering Faculty Research & Creative Works
A predictive model, based on a Cellular Automaton (CA) - Finite Element (FE) method, has been developed to simulate microstructure evolution during metal solidification for a laser based additive manufacturing process. The macroscopic FE calculation was designed to update the temperature field and simulate a high cooling rate. In the microscopic CA model, heterogeneous nucleation sites, preferential growth orientation and dendritic grain growth kinetics were simulated. The CA model was able to show the entrapment of neighboring cells and the relationship between undercooling and the grain growth rate. The model predicted the dendritic grain size, structure, and morphological evolution during …
Effect Of Architecture And Porosity On Mechanical Properties Of Borate Glass Scaffolds Made By Selective Laser Sintering, Krishna C. R. Kolan, Ming-Chuan Leu, Greg Hilmas, Taylor Comte
Effect Of Architecture And Porosity On Mechanical Properties Of Borate Glass Scaffolds Made By Selective Laser Sintering, Krishna C. R. Kolan, Ming-Chuan Leu, Greg Hilmas, Taylor Comte
Mechanical and Aerospace Engineering Faculty Research & Creative Works
The porosity and architecture of bone scaffolds, intended for use in bone repair or replacement, are two of the most important parameters in the field of bone tissue engineering. The two parameters not only affect the mechanical properties of the scaffolds but also aid in determining the amount of bone regeneration after implantation. Scaffolds with five different architectures and four porosity levels were fabricated using borate bioactive glass (13-93B3) using the selective laser sintering (SLS) process. The pore size of the scaffolds varied from 400 to 1300 μm. The compressive strength of the scaffolds varied from 1.7 to 15.5 MPa …
Effect Of Zinc Galvanization On The Microstructure And Fracture Behavior Of Low And Medium Carbon Structural Steels, Ignatius C. Okafor, Ronald J. O'Malley, Kaushal R. Prayakarao, Heshmat A. Aglan
Effect Of Zinc Galvanization On The Microstructure And Fracture Behavior Of Low And Medium Carbon Structural Steels, Ignatius C. Okafor, Ronald J. O'Malley, Kaushal R. Prayakarao, Heshmat A. Aglan
Materials Science and Engineering Faculty Research & Creative Works
Microstructure and fracture behavior of ASTM 572 Grade 65 steels used for wind tower applications have been studied. Steels of two carbon level chemistries designed for this grade were used in the study. Fracture toughness of the steels was studied using 3-point bend test on samples coated with zinc and not coated with zinc. Lower carbon steel showed higher resistance to fracture than medium carbon steel after zinc galvanization. SEM study suggests that zinc and zinc bath additives that migrated to crack tips are responsible for the loss in ductility. The phenomenon of Liquid Metal Embrittlement (LME) is suggested to …
Plastic Response Of Dislocation Glide In Solid Helium Under Dc Strain-Rate Loading, Caizhi Zhou, Jungjung Su, Matthias J. Graf, Charles J. Olson Reichhardt, Alexander V. Balatsky, Irene J. Beyerlein
Plastic Response Of Dislocation Glide In Solid Helium Under Dc Strain-Rate Loading, Caizhi Zhou, Jungjung Su, Matthias J. Graf, Charles J. Olson Reichhardt, Alexander V. Balatsky, Irene J. Beyerlein
Materials Science and Engineering Faculty Research & Creative Works
We develop a model for the gliding of dislocations and plasticity in solid 4He. This model takes into account the Peierls barrier, multiplication and interaction of dislocations, as well as classical thermally and mechanically activated processes leading to dislocation glide. We specifically examine the dc stress-strain curve and how it is affected by temperature, strain rate, and dislocation density. As a function of temperature and shear strain, we observe plastic deformation and discuss how this may be related to the experimental observation of elastic anomalies in solid hcp 4He that have been discussed in connection with the possibility …
Structural Health Monitoring Data Transmission For Composite Hydrokinetic Turbine Blades, A. Heckman, Joshua L. Rovey, K. Chandrashekhara, Steve Eugene Watkins, Daniel S. Stutts, Arindam Banerjee, Rajiv S. Mishra
Structural Health Monitoring Data Transmission For Composite Hydrokinetic Turbine Blades, A. Heckman, Joshua L. Rovey, K. Chandrashekhara, Steve Eugene Watkins, Daniel S. Stutts, Arindam Banerjee, Rajiv S. Mishra
Mechanical and Aerospace Engineering Faculty Research & Creative Works
No abstract provided.
Low-Symmetry Monoclinic Ferroelectric Phase Stabilized By Oxygen Octahedra Rotations In Strained Euₓsr₁₋ₓtio₃ Thin Films, Anna N. Morozovska, Yijia Gu, Victoria V. Khist, Maya D. Glinchuk, Long-Qing Chen, For Full List Of Authors, See Publisher's Website.
Low-Symmetry Monoclinic Ferroelectric Phase Stabilized By Oxygen Octahedra Rotations In Strained Euₓsr₁₋ₓtio₃ Thin Films, Anna N. Morozovska, Yijia Gu, Victoria V. Khist, Maya D. Glinchuk, Long-Qing Chen, For Full List Of Authors, See Publisher's Website.
Materials Science and Engineering Faculty Research & Creative Works
Using Landau-Ginzburg-Devonshire theory and phase-field modeling, we explore the complex interplay between a structural order parameter (oxygen octahedron rotation) and polarization in EuxSr1-xTiO3 thin films. Under a biaxially tensile strain, a low-symmetry monoclinic phase with in-plane ferroelectric polarization is found to be stabilized by antiferrodistortive oxygen octahedra tilts. The monoclinic phase is stable over a wide temperature range. It is characterized by a large number of energetically equivalent polar and structural twin domains. This work demonstrates the development of a spontaneous polarization and piezo- and pyroelectricity in a ferroelastic twin boundary arising from flexoelectric coupling …
Scaffold For Bone And Tissue Repair In Mammals, D. E. Day, Steven B. Jung
Scaffold For Bone And Tissue Repair In Mammals, D. E. Day, Steven B. Jung
Materials Science and Engineering Faculty Research & Creative Works
A mammalian tissue scaffold and method for making a tissue scaffold including a rigid scaffold body of biocompatible glass fibers bonded together and in special alignment to define open channels within the scaffold to allow fluid flow into and within the scaffold.
Universal Emergence Of Spatially Modulated Structures Induced By Flexoantiferrodistortive Coupling In Multiferroics, Eugene A. Eliseev, Sergei V. Kalinin, Yijia Gu, Maya D. Glinchuk, Victoria V. Khist, For Full List Of Authors, See Publisher's Website.
Universal Emergence Of Spatially Modulated Structures Induced By Flexoantiferrodistortive Coupling In Multiferroics, Eugene A. Eliseev, Sergei V. Kalinin, Yijia Gu, Maya D. Glinchuk, Victoria V. Khist, For Full List Of Authors, See Publisher's Website.
Materials Science and Engineering Faculty Research & Creative Works
We proved the existence of a universal flexoantiferrodistortive coupling as a necessary complement to the well-known flexoelectric coupling. The coupling is universal for all antiferrodistortive systems and can lead to the formation of incommensurate, spatially modulated phases in multiferroics. Our analysis can provide a self-consistent mesoscopic explanation for a broad range of modulated domain structures observed experimentally in multiferroics.
Rapid Repair Of Severely Damaged Rc Columns With Different Damage Conditions: An Experimental Study, Ruili He, Lesley Sneed, Abdeldjelil Belarbi
Rapid Repair Of Severely Damaged Rc Columns With Different Damage Conditions: An Experimental Study, Ruili He, Lesley Sneed, Abdeldjelil Belarbi
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
No abstract provided.
Review Of Anchorage Systems For Externally Bonded Frp Laminates, Stephen V. Grelle, Lesley Sneed
Review Of Anchorage Systems For Externally Bonded Frp Laminates, Stephen V. Grelle, Lesley Sneed
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
No abstract provided.
Tailoring Spin-Orbit Torque In Diluted Magnetic Semiconductors, Hang Li, Xuhui Wang, Fatih Dogan, Aurelien Manchon
Tailoring Spin-Orbit Torque In Diluted Magnetic Semiconductors, Hang Li, Xuhui Wang, Fatih Dogan, Aurelien Manchon
Materials Science and Engineering Faculty Research & Creative Works
We study the spin orbit torque arising from an intrinsic linear Dresselhaus spin-orbit coupling in a single layer III-V diluted magnetic semiconductor. We investigate the transport properties and spin torque using the linear response theory, and we report here: (1) a strong correlation exists between the angular dependence of the torque and the anisotropy of the Fermi surface; (2) the spin orbit torque depends nonlinearly on the exchange coupling. Our findings suggest the possibility to tailor the spin orbit torque magnitude and angular dependence by structural design.