Method for manufacturing a sintered body with high density

Details Method for manufacturing a sintered body with high density Method for manufacturing a sintered body with high density

1988-03-02

1989-06-27

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

264 62, 427226, 4273722, C04B 3558

Patent

active

048430439

ABSTRACT:
A method is provided for manufacturing a sintered body comprising the steps of: heating a membrane of an inorganic polysilazane in liquid formed on the surface of a porous body to oxidize a surface portion of the layer into an oxide layer and still pyrolyzing the remaining of the inorganic polysilazane, the inorganic polysilazane having the formula of (--SiH.sub.2 NH--)n where n represents the degree of polymerization; softening the oxide layer to make it impermeable; and sintering the porous body with the oxide layer having impermeability at high pressure and at high temperature n of degree of polymerization ranges 6 to 25. The layer is of 0.5 to 2.0 mm in thickness.

REFERENCES:
patent: 3834939 (1974-09-01), Beyer et al.
patent: 4112143 (1978-09-01), Adlerborn et al.
patent: 4457958 (1984-07-01), Lange et al.
patent: 4622186 (1986-11-01), Mizutani
Laine et al; CA 106(2): 5604s.

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