公开(公告)号：US20030137084A1

公开(公告)日：2003-07-24

申请号：US10283035

申请日：2002-10-25

Applicant: Japan Science and Technology Corporation

Inventor： Akira Kohyama ,  Masaki Kotani ,  Yutai Katoh

IPC: C04B035/565

CPC classification number: C04B35/571 ,  C04B35/575 ,  C04B35/806 ,  C04B2235/3834 ,  C04B2235/3873 ,  C04B2235/483 ,  C04B2235/5244 ,  C04B2235/80

Abstract: SiC fiber-reinforced SiC-matrix composite has the structure that SiC filaments are inserted into SiC matrix formed as a pyrolysis product of polyvinyl-silane (PVS) infiltrated into openings of said SiC filaments. PVS as a polymeric SiC precursor has structural units (a) and (b) at an a/b ratio of 1. A SiC fiber preform is impregnated with PVS slurry in an open or vacuum atmosphere, preheated at 300-400null C. in an inert gas atmosphere to moderate PVS to a viscous or semi-cured state, and then pyrolyzed in an argon atmosphere under application of a unidirectional pressure. A product is SiC fiber-reinforced SiC-matrix composite excellent in mechanical strength and high-temperature property with high density. The SiC composite is further densified by infiltration of PVS slurry suspending fine SiC particles therein or by repetition of impregnation with sole PVS and pressure-less pyrolysis after the pressurized pyrolysis. (a) nullSiH2nullCH2nullCH2null 1

Abstract translation: SiC纤维增强SiC基复合材料具有将SiC长丝插入SiC基体中形成的结构，其形成为聚硅氧烷（PVS）的热解产物渗透到所述SiC丝的开口中。 作为聚合物SiC前体的PVS具有a / b比为1的结构单元（a）和（b）。在开放或真空气氛中，将SiC纤维预制体浸渍在PVS浆料中，在300-400℃预热 惰性气体气氛，将PVS调节至粘性或半固化状态，然后在氩气氛下在施加单向压力下热解。 一种产品是SiC纤维增强SiC基复合材料，机械强度和高温性能优良，密度高。 通过在其中悬浮细小的SiC颗粒的PVS浆料的浸渗或通过在加压热解后重复用唯一PVS浸渍和无压力热解来进一步致密化SiC复合材料。 （a）-SiH 2 -CH 2 -CH 2 -