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1、CC复合材料高温长时烧蚀行为与控制方法Abstract： TaC ceramic interlayer was deposited on carbon fiber in three-dimensional fine-woven punctured felt by using chemical vapor infiltration method. By controlling the flow direction of the reaction gases in the preform， C/C composites with gradient distributed TaC interlaye
2、r were obtained. Microstructure， flexural property and fracture toughness of the as-prepared composites were studied. The results show that TaC interlayer is deposited on the surface of carbon fiber and presents a gradient distribution in C/C composites. The average flexural strength and fracture to
3、ughness of the as-prepared composites are 272.6 MPa and 5.0 MPa?m1/2， respectively. In general， with the decreasing of the TaC content along the thickness direction （Z-axis） of the composites，the length of carbon fiber pulled out from the carbon matrix becomes shorter. In TaC-rich area， TaC content
4、has significant influence on fracture behavior of the composites. The fracture behavior of the TaC-rich area is brittle in outer layer which has more TaC， while change to pseudo-ductile in inner layer which has less TaC. Key Words： C/C composite； Interlayer； Gradient distribution； Microstructure； Mechanical property 阅读全文链接（需实名注册）：http：/