Method for forming a high strength silicon nitride

Details Method for forming a high strength silicon nitride Method for forming a high strength silicon nitride

1989-06-19

1991-02-19

Group, Karl

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 65, 264 66, 501 97, 501 98, C04B 3558

Patent

active

049942190

ABSTRACT:
A method for forming a improved silicon nitride material characterized by high mechanical strength at high temperatures comprising a combination of approximately 0.5-6.0% by weight of strontium oxide, 2.0-12.0% by weight of yttrium oxide and the balance silicon nitride. The improved material is densified by either an encapsulated hot isostatic pressing method or an unencapsulated sinter/HIP method and can be utilized to form near net shape articles.

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