Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"Defect Diffusion"”.
-
Electrical properties and defect diffusion study in alumina and calcia-stabilized zirconia.
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Metallurgy and Materials Science, 1972
-
Multi-scale investigation of vacancy-mediated diffusion of Si in Ni near an edge dislocation
… which arises as a direct consequence of point-defect diffusion near dislocations and is also affected by the presence of solutes. In this work, we develop a multi-scale model which is able to simulate the diffusion of point-defects and solute atoms in the dislocation strain field. We first use …
-
Atomic scale diffusion in complex systems from first principles
Transport of point defects controls a variety of materials process such as precipitation, segregation of solutes to grain boundaries and surfaces, and macroscopic properties such as corrosion resistance and ionic conductivity. Therefore, a quantitative prediction of atomic scale transport is …
-
Machine-Learning Assisted Atomic Simulations of Defect Dynamics in Multicomponent Concentrated Alloys
This dissertation investigates the complex defect diffusion behaviors in concentrated solid solution alloys (CSAs) including high-entropy alloys (HEAs), which are critical for understanding their exceptional mechanical and radiation-resistant properties. Through a combination of multiple …
-
Density Functional Simulations of Defect Behavior in Oxides for Applications in MOSFET and Resistive Memory
Defects in the functional oxides play an important role in electronic devices like metal oxide semiconductor field effect transistors (MOSFETs) and resistive random-access memories (ReRAMs). The continuous scaling of CMOS has brought the Si MOSFET to its physical technology limit and the …
-
Modeling the effect of boron on microdefect formation
… demand larger diameter wafers and reduced microdefect concentration and size, one of the most crucial issues in the semiconductor industry becomes the understanding of defect formation in silicon crystal growth by the Czochralski crystal growth method. Microdefect patterns in the crystal are …
-
Surface chemistry to control bulk reaction dynamics of native point defects in rutile titanium dioxide
… spatial distribution of the point and extended defects it contains. For ceramic oxide semiconductor materials, the concentration and diffusion of cations and anions, in the form of interstitials and vacancies, plays a large role in the performance of these materials for gas sensing, …
-
Modelización microscópica del daño por irradiación en metales hcp (a-Zirconio) : efecto de la anisotropía en la difusión y evolución de defectos
… de la evolución microscópica (difusión de defectos) en metales hexagonales compactos, concretamente α-Zirconio, usando la técnica de simulación de Monte Carlo Cinético. Esta técnica permite comprender la evolución de la acumulación de daño, debida tanto a irradiación de neutrones como de …
-
Diffusion Problems in Wound Healing and a Scattering Approach to Immune System Interactions
… model for the existence of a Critical Size Defect (CSD) in certain animals is the focus of the majority of this dissertation. Adam [1] recently developed a one-dimensional model of this phenomenon, and chapters I–V address the exist the CSD in a two-dimensional model and a three-dimensional …