Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1988-06-06
1990-06-05
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264 63, 264344, 419 40, 419 49, C04B 3564
Patent
active
049312383
ABSTRACT:
Method for manufacturing a sintered body with high density comprises: turning first powder into a first slurry by dispersing the first powder in a first dispersion medium composed mainly of substances capable of being extracted by supercritical fluid and forming a compact which contains the first dispersion medium, by casting the first slurry; turning second powder into a second slurry by dispersing the second powder in a second dispersion medium composed mainly of substances capable of being extracted by supercritical fluid, and forming a film layer by coating the surface of the compact with the second slurry; extracting and removing the substances contained in the compact and the substances contained in the film layer by means of the supercritical fluid; turning the film layer on the surface of the compact into an impermeable film layer to gas by heating the compact, from which the substances have been extracted and removed; and applying a hot isostatic pressing process to the compact, the film layer on the surface of the compact having been turned into the impermeable film layer.
REFERENCES:
patent: 4112143 (1978-09-01), Adlerborn et al.
patent: 4622186 (1986-11-01), Mizutani
patent: 4643858 (1987-02-01), Mizutani
patent: 4737332 (1988-04-01), Miyashita et al.
patent: 4820462 (1989-04-01), Nakajima et al.
Kawashima Takeshi
Nishio Hiroaki
Derrington James
Nippon Kokan Kabushiki Kaisha
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