Method for manufacturing whisker preforms and composites

Details Method for manufacturing whisker preforms and composites Method for manufacturing whisker preforms and composites

1993-07-29

1995-11-07

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 62, 264 63, 264 65, 501 95, C04B 3580, C04B 3581

Patent

active

054645832

ABSTRACT:
A process for manufacturing Si.sub.3 N.sub.4 /SiAlON whiskers by mixing silicon carbide powder with aluminum nitride powder, adding impurities such as calcium oxide or potassium chloride to control whisker characteristics, forming the mixture in a boron nitrogen mold of desired shaped and hot isostatically pressing the formed mixture in a nitrogen environment to produce whiskers comprised substantially of SiAlON at the nucleating end of the whisker and Si.sub.3 N.sub.4 at the other end of the whisker. In one embodiment, reinforced composites are formed by impregnating the Si.sub.3 N.sub.4 /SiAlON whisker preform with a matrix material such as resin binders, liquid metals, intermetallics or ceramic materials.

REFERENCES:
patent: 4097293 (1978-06-01), Komeya
patent: 4717693 (1988-01-01), Wittmer
patent: 4753764 (1988-06-01), Kamijo
patent: 5030600 (1991-07-01), Hida
patent: 5118645 (1992-06-01), Pyzik

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