Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Inna G. Talmy"'
Publikováno v:
Journal of the American Ceramic Society. 94:4059-4065
Yttrium tetraboride was synthesized by reactions of Y2O3 with B4C or with a B4C/C mixture. Fully dense YB4 ceramics were prepared by hot-pressing at 1800°C and 20 MPa in He. The flexural strength and microhardness of the YB4 were about 300 MPa and 2
Publikováno v:
Materials Science and Engineering: A. 528:1994-2001
MAX-phase Zr2SC ceramics were synthesized by hot pressing mixtures containing ZrH2, carbon or ZrC, and ZrS2, WS2, or FeS2 as sulfur sources. The Zr2SC synthesized with FeS2 had a typical MAX-phase laminated structure, good thermal shock resistance, t
Publikováno v:
Journal of the European Ceramic Society. 30:2253-2263
Multi-phase ceramics in the TaC–TaB 2 –C system were prepared from TaC and B 4 C mixtures by reactive pressureless sintering at 1700–1900 °C. The pressureless densification was promoted by the use of nano-TaC and by the presence of active carb
Publikováno v:
Materials Chemistry and Physics. 115:690-695
The linear thermal expansion coefficient (CTE), heat capacity, and thermal conductivity, were investigated as a function of temperature for hot pressed ZrC and liquid phase sintered ZrC–Mo cermets. The ZrC and the ZrC–Mo cermets had the same CTE
Autor:
Stephen G. DiPietro, Gregory E. Hilmas, Sean E. Landwehr, William G. Fahrenholtz, Inna G. Talmy
Publikováno v:
Materials Science and Engineering: A. 497:79-86
Microstructure analysis and mechanical characterization were performed on ZrC–Mo composites with 20, 30, and 40 vol% Mo produced by hot isostatic pressing. The composites reached >98% relative density after processing at 1800 °C and 200 MPa for 1
Publikováno v:
Journal of the American Ceramic Society. 91:1441-1447
Flexural creep of ZrB 2 /0-50 vol% SiC ceramics was characterized in oxidizing atmosphere as a function of temperature (1200°-1500°C), stress (30-180 MPa), and SiC particle size (2 and 10 μm). Creep behavior showed strong dependence on SiC content
Publikováno v:
Journal of the American Ceramic Society. 91:873-878
Pressureless sintering of ZrC-Mo cermets was investigated in a He/H 2 atmosphere and under vacuum. A large density increase was observed for specimens with > 20 vol% Mo after heating at 2150°C for 60 min in a He/H 2 atmosphere. The increase in densi
Publikováno v:
Journal of the American Ceramic Society. 90:1998-2002
The chemical compatibility of ZrC and Mo was investigated in carburizing and carbon-free environments at temperatures from 1700° to 2200°C. Heating in the carburizing atmosphere resulted in the complete reaction of Mo with C, while the carbon-free
Publikováno v:
Journal of the American Ceramic Society. 90:1347-1364
This paper reviews the crystal chemistry, synthesis, densification, microstructure, mechanical properties, and oxidation behavior of zirconium diboride (ZrB2) and hafnium diboride (HfB2) ceramics. The refractory diborides exhibit partial or complete
Publikováno v:
Journal of Materials Research. 21:2593-2599
Ceramics in the system ZrB2–Ta5Si3 were studied as candidates for the development of new ultra high-temperature ceramic materials. The ceramics were prepared by hot pressing at 1900–2200 °C in He. Mutual additions of ZrB2 and Ta5Si3 even in smal