Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1986-08-27
1988-11-22
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264291, 264332, 501153, C04B 3560
Patent
active
047864486
ABSTRACT:
There are disclosed a plastic processing method of the pressure of pressureless sintered ceramic body composed of at least one aluminum-containing compound selected from the group consisting of aluminum oxide, aluminum nitride and aluminum oxynitride and at least one hard compound selected from the group consisting of carbides, nitrides and oxides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten and silicon and mutual solid solutions thereof, the content of said at least one aluminum-containing compound is 5 to 95% by volume, comprising subjecting the ceramic body to plastic deformation at a temperature of 1300.degree. C. or higher, under a stress of 15 kg/mm.sup.2 or smaller and at a strain rate of 10.sup.-3 /sec or less in a reducing atmosphere or in vacuum, and a ceramics-made molded material comprising a composite ceramic body composed of the same as mentioned above.
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Katsumura et al., "Plastic Deformation in Al.sub.2 O.sub.3 -Ti(C.sub.x,Ni.sub.1-x) Ceramics", High Tech Ceramics, Materials Science Monographs, 38C, pp. 2735-2745, (1987).
F. Wakai et al., "Hot Work of Yttria-Stabilized Tetragonal ZrO.sub.2 Polycrystals", Second International Symposium, Ceramic Materials and Components for Engines, Lubeck-Travvemuende, F.R.G., Apr., pp. 14-17, 1986.
C. Carry et al., Proc. British Ceramic Soc., 33, pp. 101-115, (1983), "Superplastic Forming Alumina".
F. Wakai et al., "Compressive Deformation of Y.sub.2 O.sub.3 -Stabilized ZrO.sub.2 /Al.sub.2 O.sub.3 Composite", Tigyi Kokai-shi, 94 [9], pp. 1017-1020, (1986).
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Asakawa Mutsuo
Fukawa Akira
Fukuhara Mikio
Katsumura Yuji
Miyakawa Isao
Derrington James
Toshiba Tunglogy Co., Ltd.
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