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Title: Composites comprising silicon carbide fibers dispersed in magnesia-aluminate matrix and fabrication thereof and of other composites by sinter forging

Abstract

A novel ceramic-ceramic composite of a uniform dispersion of silicon carbide fibers in a matrix of MgO.multidot.nAl.sub.2 O.sub.3 wherein n ranges from about 1 to about 4.5, said composite comprising by volume from 1 to 50% silicon carbide fibers and from 99 to 50% MgO.multidot.nAl.sub.2 O.sub.3. The composite is readily fabricated by forming a powder comprising a uniform dispersion of silicon carbide fibers in poorly crystalline phase comprising MgO and Al.sub.2 O.sub.3 in a mole ratio of n and either (a) hot pressing or preferably (b) cold pressing to form a preform and then forging utilizing a temperature in the range of 1100.degree. C. to 1900.degree. C. and a strain rate ranging from about 10.sup.-5 seconds .sup.-1 to about 1 seconds .sup.-1 so that surfaces cracks do not appear to obtain a shear deformation greater than 30%.

Inventors:
 [1];  [1];  [1]
  1. (Ithaca, NY)
Issue Date:
Research Org.:
JUPITER TECHNOLOGIES
OSTI Identifier:
867123
Patent Number(s):
4871496
Application Number:
07/230,738
Assignee:
Jupiter Technologies, Inc. (Ithaca, NY); Cornell Research Foundation, Inc. (Ithaca, NY) OSTI
DOE Contract Number:  
AC01-84ER80167
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
composites; comprising; silicon; carbide; fibers; dispersed; magnesia-aluminate; matrix; fabrication; sinter; forging; novel; ceramic-ceramic; composite; uniform; dispersion; mgo; multidot; nal; ranges; volume; 50; 99; readily; fabricated; forming; powder; poorly; crystalline; phase; mole; ratio; hot; pressing; preferably; cold; form; preform; utilizing; temperature; range; 1100; degree; 1900; strain; rate; ranging; 10; -5; -1; surfaces; cracks; appear; obtain; shear; deformation; 30; ceramic-ceramic composite; cold pressing; phase comprising; carbide fibers; powder comprising; ceramic composite; silicon carbide; hot pressing; composite comprising; crystalline phase; mole ratio; comprising silicon; uniform dispersion; hot press; composites comprising; strain rate; /264/

Citation Formats

Panda, Prakash C., Seydel, Edgar R., and Raj, Rishi. Composites comprising silicon carbide fibers dispersed in magnesia-aluminate matrix and fabrication thereof and of other composites by sinter forging. United States: N. p., 1989. Web.
Panda, Prakash C., Seydel, Edgar R., & Raj, Rishi. Composites comprising silicon carbide fibers dispersed in magnesia-aluminate matrix and fabrication thereof and of other composites by sinter forging. United States.
Panda, Prakash C., Seydel, Edgar R., and Raj, Rishi. Tue . "Composites comprising silicon carbide fibers dispersed in magnesia-aluminate matrix and fabrication thereof and of other composites by sinter forging". United States. https://www.osti.gov/servlets/purl/867123.
@article{osti_867123,
title = {Composites comprising silicon carbide fibers dispersed in magnesia-aluminate matrix and fabrication thereof and of other composites by sinter forging},
author = {Panda, Prakash C. and Seydel, Edgar R. and Raj, Rishi},
abstractNote = {A novel ceramic-ceramic composite of a uniform dispersion of silicon carbide fibers in a matrix of MgO.multidot.nAl.sub.2 O.sub.3 wherein n ranges from about 1 to about 4.5, said composite comprising by volume from 1 to 50% silicon carbide fibers and from 99 to 50% MgO.multidot.nAl.sub.2 O.sub.3. The composite is readily fabricated by forming a powder comprising a uniform dispersion of silicon carbide fibers in poorly crystalline phase comprising MgO and Al.sub.2 O.sub.3 in a mole ratio of n and either (a) hot pressing or preferably (b) cold pressing to form a preform and then forging utilizing a temperature in the range of 1100.degree. C. to 1900.degree. C. and a strain rate ranging from about 10.sup.-5 seconds .sup.-1 to about 1 seconds .sup.-1 so that surfaces cracks do not appear to obtain a shear deformation greater than 30%.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {10}
}

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