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Articles 151 - 153 of 153
Full-Text Articles in Materials Science and Engineering
High Solid Loading Aqueous Base Metal/Ceramic Feedstock For Injection Molding, Mohammad Behi
High Solid Loading Aqueous Base Metal/Ceramic Feedstock For Injection Molding, Mohammad Behi
Dissertations
Increasing volume fraction of metal powder in feedstock provided lower shrinkage. Reduction of the shrinkage results in better dimensional precision. The rheology of the feedstock material plays an important role to allowing larger volume fractions of the metal powder to be incorporated in the feedstock forinulations. The viscosity of the feedstock inainly depends on the binder viscosity, powder volume fraction and characteristics of metal powder.
Aqueous polysaccharide agar was used as a baseline binder system for this study.The effect of several gel-strengthening additives on 1.5wt% and 2wt% agar gel was evaluated. A new gel-strengthening additive was found to be the …
Low Energy Implantation Of Boron With Decaborane Ions, Maria Angela Albano
Low Energy Implantation Of Boron With Decaborane Ions, Maria Angela Albano
Dissertations
The goal of this dissertation was to determine the feasibility of a novel approach to forming ultra shallow p-type junctions (tens of nm.) needed for future generations of Si MOS devices. In the new approach, B dopant atoms are implanted by cluster ions obtained by ionization of decaborane (B10H14)vapor. Each B atom carries only ~9% of the cluster kinetic energy and the B dose per unit charge is 10 times larger than in the case of monomer ion beams. Thus, the problems of spacecharge, limiting the extraction and transport of low energy (< = 1 keV) beams of B+ ions, can …
Synthesis And Characterization Of Low Pressure Chemically Vapor Deposited Boron Nitride And Titanium Nitride Films, Narahari Ramanuja
Synthesis And Characterization Of Low Pressure Chemically Vapor Deposited Boron Nitride And Titanium Nitride Films, Narahari Ramanuja
Dissertations
This study has investigated the interrelationships governing the growth kinetics, resulting compositions, and properties of boron nitride (B-C-N-H) and titanium nitride (Ti-N-Cl) films synthesized by low pressure chemical vapor deposition (LPCVD) using ammonia (NH3)/triethylamine-borane and NH3/titanium tetrachloride as reactants, respectively.Several analytical methods such as the FTIR, UVNisible spectroscopy, XPS, AES, RBS, SEM, and XRD were used to study the stoichiometry and structure of the deposited films.
The B-N-C-H films were synthesized over a temperature range of 300 to 8500C at various flow rate ratios of the reactants and total pressure range of 50 to 150 mTorr. …