【作者】 杨延清； 王寒； 赵光明； 黄斌； 罗贤； 陈彦；

【Author】 YANG Yanqing,WANG Han,ZHAO Guangming,HUANG Bin,LUO Xian,CHEN Yan State Key Lab of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072

【机构】 西北工业大学凝固技术国家重点实验室；

【摘要】 本文采用X射线衍射、金相显微镜、扫描电镜、能谱仪和EBSD等技术对纤维涂层法制备的SiCf/Ti-6Al-4V复合材料的微观组织的形成进行了研究,发现纤维涂层法制备的SiCf/Ti-6Al-4V复合材料存在一定的界面反应,其基体钛合金的组织非常细小,在靠近SiC纤维处,基体钛合金基本上由等轴α组成,离纤维较远处的钛合金的组织为等轴α、条状的β转变组织和一些未转变的β相小颗粒。SiCf/Ti-6Al-4V复合材料的微观组织的形成与高温热压成形过程中的元素扩散和应力分布有关。更多还原

【Abstract】 The microstructure of SiC_f/Ti-6Al-4V composites fabricated by the may of Matrix-Coated Fiber and hot-pressing was investigated by means of X-ray diffraction,optical microscope,scanning electron microscope,energy dispersive X-ray spectrum and electron back scattered diffraction.It was found that a certain interfacial reaction exists between SiC fiber and titanium matrix with very fine microstructures of the composites.The titanium matrix close to the SiC fiber is meanly composed of equiaxedα.But away from the fiber,the microstructure of the Ti-6A1-4V matrix consists of equiaxed a,plate-like transformedβand some of small particles ofβphase.The formation of the microstructure is attributed to the elements diffusion and the stress distribution in the composites during hot-pressing.更多还原