Title:
【発明の名称】自己補強ベーター窒化ケイ素を含んでいるサーメットまたはセラミック/ガラス複合体およびそれらの製造方法
Document Type and Number:
Japanese Patent JPH08500634
Kind Code:
A
Abstract:
Infiltrate a porous, self-reinforced beta -Si3N4 preform with a metal or a crystallizable glass to yield a composite material. The preform possesses a low glass phase and has a density of from about 50 to about 70 percent of theoretical density. Prepare the beta -Si3N4 preform by subjecting a porous body formed from an alpha -Si3N4 powder composition to two sequential heat treatments. The first heat treatment occurs below the alpha - to beta - conversion temperature and results in a strengthened body that can be machined. The second heat treatment occurs above that temperature and yields the self-reinforced beta -Si3N4 preform. Conventional infiltration procedures with an infiltrant that is a metal or a glass results in a Si3N4/metal or Si3N4/glass composite material that has 50 to 70 percent of its volume occupied by beta -Si3N4 whiskers.
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Inventors:
Pikiku, Alexander Jei
Application Number:
JP50716394A
Publication Date:
January 23, 1996
Filing Date:
June 16, 1993
Export Citation:
Assignee:
The Dow Chemical Company
International Classes:
C04B41/85; C03C14/00; C04B30/02; C04B38/00; C04B41/88; C22C1/10; C22C29/16; C22C47/00; C22C47/08; C22C47/12; C22C49/00; C22C49/06; C22C49/08; C22C49/11; (IPC1-7): C22C1/09; C04B41/85; C04B41/88; C22C1/09; C22C29/16
Attorney, Agent or Firm:
Heiyoshi Odashima