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Title: Method for manufacturing whisker preforms and composites

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.

Inventors:
 [1]
  1. (Idaho Falls, ID)
Issue Date:
Research Org.:
EG & G IDAHO INC
OSTI Identifier:
870144
Patent Number(s):
5464583
Assignee:
Lockheed Idaho Technologies Company (Idaho Falls, ID) INEEL
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; manufacturing; whisker; preforms; composites; process; sialon; whiskers; mixing; silicon; carbide; powder; aluminum; nitride; adding; impurities; calcium; oxide; potassium; chloride; control; characteristics; forming; mixture; boron; nitrogen; mold; desired; shaped; hot; isostatically; pressing; formed; environment; produce; comprised; substantially; nucleating; embodiment; reinforced; impregnating; preform; matrix; material; resin; binders; liquid; metals; intermetallics; ceramic; materials; hot isostatically; nitride powder; aluminum nitride; liquid metals; carbide powder; ceramic material; matrix material; calcium oxide; liquid metal; silicon carbide; ceramic materials; hot isostatic; desired shape; potassium chloride; nitrogen environment; isostatically pressing; mixing silicon; resin binder; ceramic mater; reinforced composite; reinforced composites; adding impurities; /264/501/

Citation Formats

Lessing, Paul A. Method for manufacturing whisker preforms and composites. United States: N. p., 1995. Web.
Lessing, Paul A. Method for manufacturing whisker preforms and composites. United States.
Lessing, Paul A. Sun . "Method for manufacturing whisker preforms and composites". United States. https://www.osti.gov/servlets/purl/870144.
@article{osti_870144,
title = {Method for manufacturing whisker preforms and composites},
author = {Lessing, Paul A.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

Patent:

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