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Title: Method for manufacturing whisker preforms and composites

Abstract

A process is disclosed 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.

Inventors:
Issue Date:
Research Org.:
EG & G Idaho Inc
OSTI Identifier:
131915
Patent Number(s):
5464583
Application Number:
PAN: 8-100,008
Assignee:
Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 7 Nov 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SILICON NITRIDES; FABRICATION; ALUMINIUM OXIDES; COMPOSITE MATERIALS; HOT PRESSING; CONTROLLED ATMOSPHERES; IMPREGNATION

Citation Formats

Lessing, P A. Method for manufacturing whisker preforms and composites. United States: N. p., 1995. Web.
Lessing, P A. Method for manufacturing whisker preforms and composites. United States.
Lessing, P A. Tue . "Method for manufacturing whisker preforms and composites". United States.
@article{osti_131915,
title = {Method for manufacturing whisker preforms and composites},
author = {Lessing, P A},
abstractNote = {A process is disclosed 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {11}
}