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Method for producing SiC fiber-reinforced SiC composite material by means of hot press achieved

Foreign code F110005124
File No. A071-38US
Posted date Aug 23, 2011
Country United States of America
Application number 47385301
Gazette No. 20040113332
Gazette No. 7404922
Date of filing Oct 25, 2001
Gazette Date Jun 17, 2004
Gazette Date Jul 29, 2008
International application number JP2001009363
International publication number WO2002081405
Date of international filing Oct 25, 2001
Date of international publication Oct 17, 2002
Priority data
  • P2001-104186 (Apr 3, 2001) JP
  • 2001WO-JP09363 (Oct 25, 2001) WO
Title Method for producing SiC fiber-reinforced SiC composite material by means of hot press achieved
Abstract (US7404922)
A powdery mixture of fine SiC powder with one or more oxide sintering additives of Al2O3, Y2O3, SiO2 and CaO is blended and uniformly dispersed in a polymeric SiC precursor to prepare a matrix-forming polymeric slurry.
A preform of SiC fiber, which has quasi-stoichiometric composition with high crystallinity, is impregnated with the polymeric slurry and then hot-pressed at a temperature of 1600.degree. C. or higher in presence of a liquid phase.
Since the heat-resistant SiC fiber is used as strengthening fiber, the prepreg is sintered to a dense SiC composite excellent in mechanical properties by one-step hot-pressing.
Scope of claims [claim1]
1. A hot-pressing method of manufacturing a SiC-matrix composite reinforced by SiC fiber, which comprises the steps of: providing a powdery mixture of fine SiC powder with one or more sintering additives selected from Al2O3, Y2O3, SiO2 and CaO;
preparing a matrix-forming slurry by blending said powdery mixture in a polymeric SiC precursor;impregnating a preform of SiC fiber, which has quasi-stoichiometric composition with high crystallinity, with said slurry;
and
hot-pressing said SiC fiber impregnated preform at a temperature between 1600 deg. C. and 1850 deg. C. with a pressure of 10-20 MPa in presence of a liquid phase resulting from reaction of the sintering additive or additives with fine SiC powder.
[claim2]
2. The hot-pressing method defined by claim 1, wherein the polymeric SiC precursor is one or more of polycarbosilane, polyvinylsilane and polymethylsilane.
  • Inventor, and Inventor/Applicant
  • KOHYAMA AKIRA
  • KATOH YUTAI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
IPC(International Patent Classification)
Reference ( R and D project ) CREST Social Systems for Better Environment Performance AREA
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