Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1985-03-27
1986-12-02
Dixon, Jr., William R.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264 60, 264 66, 501 1, 501103, 501104, 501153, 623 16, C04B 3700, C04B 3500, C04B 3548
Patent
active
046263926
ABSTRACT:
A process for producing a ceramic body suitable for surgical implantation that has high strength and toughness and good compatibility with bone material. A porous material is provided by semi-sintering a ceramic compact. The pores in the surface of the porous material are filled with a first powder of either tricalcium phosphate or apatite or both, or with a material of the fine powder and a powder of a material substantially the same as the material of the ceramic compact. The porous material is then fired at the sintering temperature of the ceramic compact. Following sintering, the surface of the porous material is coated with a fine apatite powder or a finally pulverized mixture of apatite and a calcium phosphate base frit. The resulting assembly is then fired at a temperature up to about 1,350.degree. C.
REFERENCES:
patent: 4308064 (1981-12-01), Takami et al.
patent: 4376168 (1983-03-01), Takani et al.
patent: 4525464 (1985-06-01), Claussen et al.
patent: 4560666 (1985-12-01), Yoshida et al.
Iio Satoshi
Kondo Kazuo
Okuyama Masahiko
Watanabe Masakazu
Crotty Kathleen E.
Dixon Jr. William R.
NGK Spark Plug Co. Ltd.
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