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Numerical Simulation Of The Influence Of Ceramic Preform On The Infiltration Process Of Metal Matrix Composites, Chang-chun Dong, Jian-xin Zhou, Ya-jun Yin, Xu Shen 2016 Huazhong University of Science and Technology

Numerical Simulation Of The Influence Of Ceramic Preform On The Infiltration Process Of Metal Matrix Composites, Chang-Chun Dong, Jian-Xin Zhou, Ya-Jun Yin, Xu Shen

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Wetting And Interfacial Microstructure Of Porous Si3n4/Si3n4 Joint After Silver Metallization, Yanli Zhuang, Tiesong Lin, Shengjin Wang, Peng He, Dusan P. Sekulic, Dechang Jia, Hongmei Wei 2016 Harbin Institute of Technology

Wetting And Interfacial Microstructure Of Porous Si3n4/Si3n4 Joint After Silver Metallization, Yanli Zhuang, Tiesong Lin, Shengjin Wang, Peng He, Dusan P. Sekulic, Dechang Jia, Hongmei Wei

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Effect Of Post-Treatment On Micro-Structure And Properties Of Al2o3–13 Wt%Tio2 Plasma-Spray Coating, Zehua Zhou 2016 Hohai University

Effect Of Post-Treatment On Micro-Structure And Properties Of Al2o3–13 Wt%Tio2 Plasma-Spray Coating, Zehua Zhou

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Fluorescent Materials Design At Nanoscale For Biomedical Photonics In Near Infrared Window, Kohei Soga, Masao Kamimura 2016 Tokyo University of Science

Fluorescent Materials Design At Nanoscale For Biomedical Photonics In Near Infrared Window, Kohei Soga, Masao Kamimura

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Review On Joining Of Advanced Materials And Dissimilar Materials In Harbin Institute Of Technology, Jun Qu, Yongping Lei, Peng He, Yunlong Chang 2016 Oak Ridge National Laboratory

Review On Joining Of Advanced Materials And Dissimilar Materials In Harbin Institute Of Technology, Jun Qu, Yongping Lei, Peng He, Yunlong Chang

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.


Thermoelectric Half-Heuslers: Synthesis, Processing, And Performance, Joseph Robert Croteau 2016 Boise State University

Thermoelectric Half-Heuslers: Synthesis, Processing, And Performance, Joseph Robert Croteau

Boise State University Theses and Dissertations

Thermoelectric half-Heusler compounds have potential to convert the heat wasted from industrial and transportation processes to useful electricity. Among the highest performing half-Heusler compounds are nano-structured bulk materials which have been arc-melted, pulverized into a nano-powder, and sintered by DC-hot press. High performing n- and p-type half-Heusler compounds with nominal composition of Hf0.25Zr0.75NiSn0.99Sb0.01 and Nb0.75Ti0.25FeSb, respectively, have been provided to us in both dense and powder form by our collaborators at the University of Houston. We consolidate these powders by SPS, refine these ...


Formation Cadmium And Densification Of Manganese Ferrite, B. W. Jong, P. D. Ownby 2016 Missouri University of Science and Technology

Formation Cadmium And Densification Of Manganese Ferrite, B. W. Jong, P. D. Ownby

P. Darrell Ownby (Emeritus)

Formation of Ni-ferrite, Mn-ferrite, NiZn-ferrite, Zn-ferrite and Mg-ferrite have been investigated using X-ray diffraction analysis. Jander's diffusion equation described the data from these investigations over a portion of the temperature ranges studied. However, the reaction mechanisms and sequences involved in the formation of mixed ferrites have not been well defined in the literature. The purposes of this investigation were: ( 1) To further the understanding of the formation of CdMnferrite by studying first the kinetics of the formation of Cd-ferrite and Cd-manganite, which provides a basis for understanding the details of the mixed CdMn-ferrite reaction and to obtain the optimum ...


A Preliminary Study Of The Effect Of Heat Treatment On The Strength And Microstructure Of A Glass-Ceramic Material, P. D. Ownby 2016 Missouri University of Science and Technology

A Preliminary Study Of The Effect Of Heat Treatment On The Strength And Microstructure Of A Glass-Ceramic Material, P. D. Ownby

P. Darrell Ownby (Emeritus)

"The strength and microstructure of a glass-ceramic material of the composition 53 percent SiO₂, 19 percent Al₂O₃, 15 percent MgO, and 13 percent Li₂O were studied. Cylindrical specimens of glass were formed and heat-treated to six different temperature levels for various time periods. The method of strength testing used was a diametral compression loading technique. It was found that the strength of this material increased initially with heat-treatment but then decreased. The strength characteristics of the completely crystallized glass ceramic material were found to be dependent on the initial nucleation period. Some factors which influenced anomalous crystal growth are described ...


Design And Testing Of A Top Mask Projection Ceramic Stereolithography System For Ceramic Part Manufacturing, Dylan Robert de Caussin 2016 California Polytechnic State University, San Luis Obispo

Design And Testing Of A Top Mask Projection Ceramic Stereolithography System For Ceramic Part Manufacturing, Dylan Robert De Caussin

Master's Theses and Project Reports

Ceramic manufacturing is an expensive process with long lead times between

the initial design and final manufactured part. This limits the use of ceramic as a viable material unless there is a large project budget or high production volume associated with the part. Ceramic stereolithography is an alternative to producing low cost parts through the mixing of a photo curable resin and ceramic particles. This is an additive manufacturing process in which each layer is built upon the previous to produce a green body that can be sintered for a fully dense ceramic part.

This thesis introduces a new approach ...


Feasibility Of Fused Deposition Of Ceramics With Zirconia And Acrylic Binder, Lindsay V. Page 2016 California Polytechnic State University, San Luis Obispo

Feasibility Of Fused Deposition Of Ceramics With Zirconia And Acrylic Binder, Lindsay V. Page

Master's Theses and Project Reports

Processing of ceramics has always been difficult due to how hard and brittle the material is. Fused Deposition of Ceramics (FDC) is a method of additive manufacturing which allows ceramic parts to be built layer by layer, abetting more complex geometries and avoiding the potential to fracture seen with processes such as grinding and milling. In the process of FDC, a polymeric binder system is mixed with ceramic powder for the printing of the part and then burned out to leave a fully ceramic part. This experiment investigates a new combination of materials, zirconia and acrylic binder, optimizing the process ...


Devitrification Rates Of Fused Silica In The Presence Of Trace Impurities, Nicholas Kivi, Adrian Moore, Kayla Dyar, Samuel Haaf 2016 University of Tennessee, Knoxville

Devitrification Rates Of Fused Silica In The Presence Of Trace Impurities, Nicholas Kivi, Adrian Moore, Kayla Dyar, Samuel Haaf

University of Tennessee Honors Thesis Projects

No abstract provided.


Magnetron Sputtering And Corrosion Of Ti-Al-C And Cr-Al-C Coatings For Zr-Alloy Nuclear Fuel Cladding, Devin Alan Roberts 2016 University of Tennessee - Knoxville

Magnetron Sputtering And Corrosion Of Ti-Al-C And Cr-Al-C Coatings For Zr-Alloy Nuclear Fuel Cladding, Devin Alan Roberts

Masters Theses

The disaster at the Fukushima Daiichi Nuclear Power Plant in March 2011 bought renewed focus to the issue of corrosion in nuclear fuel cladding applications. This thesis reports on the background behind these issues, the investigation strategy, and the analysis of experiments focused on mitigating oxidation of Zr-alloy fuel cladding. This thesis seeks to develop magnetron sputtered Ti-Al-C and Cr-Al-C coatings for Zr-alloy substrates and characterize the as-deposited and corroded samples.

Ti-Al-C and Cr-Al-C coatings were deposited onto ZIRLO, Si, and Al2O3 [Aluminum Oxide] substrates under various sputtering conditions. A combinatorial sputtering method was employed to refine ...


Power Maximization For Pyroelectric, Piezoelectric, And Hybrid Energy Harvesting, Murtadha A. Shaheen 2016 Virginia Commonwealth University

Power Maximization For Pyroelectric, Piezoelectric, And Hybrid Energy Harvesting, Murtadha A. Shaheen

Theses and Dissertations

The goal of this dissertation consists of improving the efficiency of energy harvesting using pyroelectric and piezoelectric materials in a system by the proper characterization of electrical parameters, widening frequency, and coupling of both effects with the appropriate parameters.

A new simple stand-alone method of characterizing the impedance of a pyroelectric cell has been demonstrated. This method utilizes a Pyroelectric single pole low pass filter technique, PSLPF. Utilizing the properties of a PSLPF, where a known input voltage is applied and capacitance Cp and resistance Rp can be calculated at a frequency of 1 mHz to 1 Hz ...


New Nde Methods For Quality Assessment Of Advanced Ceramic Materials And Systems, Alexander Michaelis 2016 Fraunhofer IKTS

New Nde Methods For Quality Assessment Of Advanced Ceramic Materials And Systems, Alexander Michaelis

Review of Progress in Quantitative Nondestructive Evaluation

Advanced ceramic materials offer enormous potential for innovations in the fields of efficient energy conversion and storage, propulsion systems, smart structures, sensor technology as well as environmental technology. The joint application of structural and functional ceramic technology allows for unique combination of electronic, ionic (electrochemical) and mechanical properties enabling the development of new, highly integrated systems in the above mentioned fields. However, due to the specific brittle failure mechanism of ceramic materials (Griffith behavior) the production of ceramic components requires new approaches for non destructive in-line testing. For this, we employ a broad variation of NDE methods such as x-ray ...


Texture Determination From Ultrasonic Wave Speeds For Hexagonal Close Pack And Cubic Materials, Bo Lan, Michael J.S. Lowe, Fionn Dunne, P. E. Dunne 2016 Imperial College London

Texture Determination From Ultrasonic Wave Speeds For Hexagonal Close Pack And Cubic Materials, Bo Lan, Michael J.S. Lowe, Fionn Dunne, P. E. Dunne

Review of Progress in Quantitative Nondestructive Evaluation

Crystallographic texture in polycrystalline hexagonal close pack (HCP) and cubic materials, often developed during thermomechanical deformations, has profound effects on properties at the macroscopic or component level. In this talk, a novel theoretical convolution model is presented, which couples the single crystal wave speed (the kernel function) with the polycrystal crystallographic orientation distribution function to give the resultant polycrystal wave speed function. Firstly developed on HCP [1] and then successfully extended to general anisotropic materials [2], the theoretical model expresses the three functions as harmonic expansions, thus enabling the calculation of any one of them when the other two are ...


Ion Irradiation-Induced Microstructural Change In Sic, Chien-Hung Chen 2015 University of Tennessee - Knoxville

Ion Irradiation-Induced Microstructural Change In Sic, Chien-Hung Chen

Doctoral Dissertations

The high temperature radiation resistance of nuclear materials has become a key issue in developing future nuclear reactors. Because of its mechanical stability under high-energy neutron irradiation and high temperature, silicon carbide (SiC) has great potential as a structural material in advanced nuclear energy systems.

A newly developed nano-engineered (NE) 3C SiC with a nano-layered stacking fault (SFs) structure has been recently considered as a prospective choice due to enhanced point defect annihilation between layer-type structures, leading to outstanding radiation durability.

The objective of this project was to advance the understanding of gas bubble formation mechanisms under irradiation conditions in ...


Ion Irradiation Characterization Studies Of Max Phase Ceramics, Daniel William Clark 2015 University of Tennessee - Knoxville

Ion Irradiation Characterization Studies Of Max Phase Ceramics, Daniel William Clark

Masters Theses

The family of layered carbides and nitrides known as MAX phase ceramics combine many attractive properties of both ceramics and metals due to their nanolaminate crystal structure and are promising potential candidates for application in future nuclear reactors. This thesis reports on the background, design, and analysis of an experiment focused on determining the effects of energetic heavy ion irradiations on polycrystalline samples of titanium silicon carbide 312, titanium aluminum carbide 312, and titanium aluminum carbide 211. The irradiation conditions consisted of ion doses between 10 and 30 displacements per atom at temperatures of 400 and 700 degrees Celsius, conditions ...


Cobalt Ferrite Nanoparticles Fabricated Via Co-Precipitation In Air: Overview Of Size Control And Magnetic Properties, Dennis Toledo 2015 Florida International University

Cobalt Ferrite Nanoparticles Fabricated Via Co-Precipitation In Air: Overview Of Size Control And Magnetic Properties, Dennis Toledo

FIU Electronic Theses and Dissertations

Cobalt Ferrite has important, size-dependent magnetic properties. Consequently, an overview of particle size is important. Co-precipitation in air was the fabrication method used because it is comparatively simple and safe. The effects of three different reaction times including 1, 2, 3 hour(s) on particle size were compared. Also, the effectiveness of three different capping agents (Oleic Acid, Polyvinylpyrollidone (PVP), and Trisodium Citrate) in reducing aggregation and correspondingly particle size were examined. Using Welch’s analysis of variance (ANOVA) and the relevant post hoc tests, there was no significant difference (p=0.05) between reaction times of 1 hour and ...


Grain Boundary Migration Of Nio-Mgo Alloys, Xin Li Phuah, David Lowing, John Blendell 2015 Purdue University

Grain Boundary Migration Of Nio-Mgo Alloys, Xin Li Phuah, David Lowing, John Blendell

The Summer Undergraduate Research Fellowship (SURF) Symposium

Grain boundary engineering offers enhanced control of microstructure development during processing, leading to improved final material properties. However, using the effects of the interfacial energy anisotropy on grain boundary mobility to control microstructure development is not well understood. The NiO-MgO system is studied as it has complete solid solubility and a transition in the faceting behavior with composition due to changes in the interfacial energy anisotropy. NiO-MgO powders were produced through the amorphous citrate process and modifications to the process were made to reduce particle and agglomerate size. The powders were pressed and sintered in various conditions to produce fine ...


Ion Irradiation Induced Damage And Dynamic Recovery In Single Crystal Silicon Carbide And Strontium Titanate, Haizhou Xue 2015 University of Tennessee - Knoxville

Ion Irradiation Induced Damage And Dynamic Recovery In Single Crystal Silicon Carbide And Strontium Titanate, Haizhou Xue

Doctoral Dissertations

The objective of this thesis work is to gain better understanding of ion-solid interaction in the energy regime where electronic and nuclear energy loss are comparable. Such responses of materials to ion irradiations are of fundamental importance for micro-electronics and nuclear applications. The ion irradiation induced modification for the crystal structure, the physical and chemical properties etc. may strongly affect the performance of functional materials that needs to be better understood.

Experimentally, ion irradiation induced damage accumulation and dynamic recovery in SiC [silicon carbide] and SrTiO3 [strontium titanate] were studied in this dissertation project. Five chapters are presented: Firstly ...


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