Results 261 to 270 of about 27,819 (290)

Hydrothermal reaction sintering of monoclinic zirconia

1989
A dense monoclinic zirconia ceramic having a maximum density of 5.85 g/cm3 and grains of 1–5 µm has been prepared from Zr metal powder and water in a Pt capsule by hydrothermal reaction sintering at 1000°C for 3 h under 98 MPa. The effects of temperatures, pressures, and initial compositions on the densification and sintering were studied. The reaction
Masahiro Yoshimura, Shigeyuki Sômiya
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Reaction Sintering of Uranium Monocarbide

Transactions of the Indian Ceramic Society, 1975
High density (95% theoretical) single-phase uranium monocarbide has been fabricated by warm pressing a mixture of suitably sized dicarbide and uranium metal powders at 800°C at 675 kg/cm2 for 5 minutes and by subsequent sintering at 600°-1000°C. The high density and the single phase structure could be retained upto 1800°C, though some grain growth ...
B. D. Zope, V. K. Moorthy
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Sintering Reactions of Zinc Oxide

Journal of Applied Physics, 1959
The sintering of zinc oxide spheres has been studied in the temperature range 700 to 900°C in air, oxygen, helium, and hydrogen. Fresh zinc oxide sinters rapidly in air and oxygen, but it does not sinter appreciably in helium in the same temperature range.
V. J. Lee, G. Parravano
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Reactions for Hydrothermal Reaction Sintering

1990
Metal powders or chips were reacted with high temperature and high pressure solution to form oxides under certain hydrothermal conditions.
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Fractography of Reaction-Sintered Si3N4

Journal of Engineering for Power, 1980
Fractography studies were accomplished on two reaction-sintered Si3N4 materials (Norton NC-350 Si3N4 and KBI (Kawecki-Berylco) Si3N4) which had been tested in four-point bending at room temperature, 1200, 1350, and 1500°C in air. At room temperature NC-350 exhibited uniform planar features representing a transgranular fracture mode, uniformly ...
M. G. Mendiratta, P. L. Land, R. Ruh, R. W. Rice, D. C. Larsen   +4 more
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Synthesis of hercynite by reaction sintering

Journal of the European Ceramic Society, 2011
Abstract Hercynite was synthesized by a reaction sintering method using industrial alumina, mill scale, and carbon black as starting materials in the presence of nitrogen and solid carbon at high temperatures. Phase and microstructure changes during the synthesis were investigated. The specimen sintered at 1450 °C consisted of hercynite (FeO·Al 2 O 3
Junhong Chen, Lingyan Yu, Jialin Sun, Yong Li, Wendong Xue   +4 more
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Fabrication of Reaction‐Sintered Sialon

Journal of the American Ceramic Society, 1977
A factorial design experiment was conducted to determine the major parameters affecting the densification of mixtures having the composition (in mol%) 50 Si 3 N 4 , 25 A1 2 O 3
R. R. WILLS, R. W. STEWART, J. M. WIMMER
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Hydrothermal Reaction Sintering of High Density Sintered Oxides

1989
Hydrothermal Reaction Sintering is one of methods to produce high density oxides ceramics. Oxide formation occurs between metal and high temperature and high pressure solutions at certain temperature, pressure and time. $$ Me + {H_2}O \to Me{O_X} + {H_2} $$
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Microstructure of cBN-diamond sintered compact prepared by reaction sintering

Journal of Materials Science, 1991
cBN-diamond composite sintered compacts (diamond content 15–70 wt %) were prepared by reaction sintering at 7–7.5 GPa and 1400–1700 °C for 10–30 min from the starting powder of the hBN-diamond system in the presence of 1 wt % NH4NO3 as a volatile catalyst. A fully dense sintered compact with 99% conversion from hBN to cBN was obtained at 7 GPa and 1700
H. Itoh, H. Takao, H. Iwahara
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Reaction sintering of Fe-Al-Si alloys

Journal of Phase Equilibria, 2002
The present study concerns the production of multiphase alloys of the Fe-Al-Si system using a powder metallurgical approach. Several compositions have been considered based on α-Fe, α′-FeAl; and α″-Fe3Al intermetallic phases. Elemental powder mixtures were compacted and sintered in a dilatometer.
Gialanella, Stefano, G. Camana, J. Kazior, Lutterotti, Luca, T. Pieczonka, Molinari, Alberto   +5 more
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