SiCf/SiC 复合材料工艺优化及性能研究
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Process optimization and performance study of SiCf/SiC composite materials
ZHENG Wei1*，QIN Fule'，CHEN Jing'，WANG Xu² （1.AECC Shenyang Liming Aero-Engine Co.，Ltd.，Shenyang 110043; 2.School of Materials science& engineering，Beijing Institute of Technology，Beijing 100081）
Abstract：Inordertoimprove the mechanical propertiesofSiC/SiCcomposite materials，thisarticleuses CVI+PIPcomposite processtoprepare SiC/SiCcomposite materialsand studies theefectofcrossinking pyrolysis proess onthemechanical propertiesofSiC/SiCcomposite materials.Theresults indicate thatthecroslinking pyrolysisandatmospheric pressure sintering methods are suitablefor SiC/SiCcomposite materials.The mechanical properties of SiC/SiCcomposite materials are superiortothose ofSiC/SiCcomposite materialspreparedby vacuum sintering.Increasing thecroslinking pyrolysis process canimprovetheceramicyield，reducetheimpregnation-pyrolysisdensificationcycle，andtheporosityofSiC/SiCcomposite materialsprepared byatmospheric pressure sintering isrelativedreduced，andtheroomtemperature tensilesrrength and bending strength are improved.
Keywords：SiC/SiCcomposite materials;compositeprocess; mechanical properties;crossinking pyolysis proce; porosity
1引言
随着航空发动机向高推重比方向发展，涡轮前燃气温度越来越高，对热端部件材料的高温强度、抗腐蚀性及抗氧化性能等要求也越来越高。（剩余5022字）
