| Relation Between Thermal Conductivity, Sintering Mechanism and Microstructure of AlN With Yttrium Aluminate Grain Boundary Phases |
92 |
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| Authors:
W. E. Lee; S. K. Chiang; R; R. Donn; P. T. B. Shaffer; OHIO STATE UNIV COLUMBUS DEPT OF MATERIALS SCIENCE AND ENGINEERING
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 | High thermal conductivity, polycrystalline, AlN ceramics are being considered as microelectronic packaging materials. Careful microstructural characterization of AlN with various Y2O3 contents has been used to determine the particular yttrium aluminate second phases formed on sintering. The presence and morphology of the aluminates explains the variation of thermal conductivity with Y2O3 content and gives an indication of the sintering mechanism. |
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| Fracture Characterization of Chemical Vapor and Combustion Deposited Diamond |
91 |
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| Authors:
H. A. Hoff; A. A. Morrish; K. A. Snail; J. E. Butler; R; NAVAL RESEARCH LAB WASHINGTON DC
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| The fracture characteristics of diamond, deposited either by oxygen- acetylene combustion or by chemical vapor deposition (CVD), vary with the type of deposition. The fracture mode has been observed to be intergranular in combustion deposits, while transgranular in CVD. Transgranular fracture at room temperature attests to the inherent strength of the deposition. The characteristics of crack propagation are similar in both combustion and CVD diamond independent of fracture mode. For ... |
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| The Effect of Aging on the Abrasion Behavior of SiC(w)/2124 Metal Matrix Composites |
90 |
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| Authors:
Aiguo Wang; R; CLEMSON UNIV SC DEPT OF MECHANICAL ENGINEERING
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| ER-1422: Biodegradation of 1,4-Dioxane |
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118 pages |
| Authors:
Robert J Steffan; Kevin McClay; R; Hisako Masuda; Gerben J Zylstra; SHAW ENVIRONMENTAL INC LAWRENCEVILLE NJ
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 | The specific goals of this project were: 1) to evaluate biodegradation of 1,4-dioxane in environmental samples under different redox and chemical/physical conditions and different treatment regimes; 2) identify and isolate new 1,4-dioxane degrading microbes from environmental microcosms; 3) identify the products of 1,4-dioxane biodegradation by studying degradation pathways in pure bacterial cultures; 4) confirm that the same biodegradation pathways occur in active environmental samples; and 5) identify and evaluate genes ... |
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