SiCf/Ti/Ti2AlNb叠层复合材料制备及组织性能  

Preparation and microstructure property of SiCf/Ti/Ti2 AlNb laminated composite

作　　者：金旗 任学平[1] 李殊霞 张国庆 曲海涛 赵冰 侯红亮 JIN Qi;REN Xue-ping;LI Shu-xia;ZHANG Guo-qing;QU Hai-tao;ZHAO Bing;HOU Hong-liang(School of Materials Science&Engineering,University of Science and Technology Beijing,Beijing 100083,China;AVIC Manufacturing Technology Institute,Beijing 100024,China;School of Flight,Anyang Institute of Technology,Anyang 455000,China)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中国航空制造技术研究院,北京100024 [3]安阳工学院飞行学院,河南安阳455000

出　　处：《塑性工程学报》2020年第3期72-80,共9页Journal of Plasticity Engineering

基　　金：国家自然基金青年基金资助项目(51605457,51505450)。

摘　　要：针对目前航空航天材料结构轻量化的要求,以连续SiC纤维、Ti箔和Ti2AlNb箔为原材料,基于真空热压技术,采用Foil-Fiber-Foil法,通过优化制备工艺,获得SiCf/Ti/Ti2AlNb叠层复合材料。利用扫描电镜和能谱分析仪对制备的复合材料界面微观组织进行分析,通过密度测试和拉伸试验计算材料的比强度和比刚度。结果表明,在920℃、40 MPa下保温保压1 h,可获得理想的SiCf/Ti/Ti2AlNb叠层复合材料,SiC纤维排布均匀,Ti/Ti2AlNb界面平直。其中,SiC/Ti界面为0.8μm的TiC,而Ti/Ti2AlNb界面为α+β双相组织和富B2相,均形成良好的冶金结合,有利于载荷传递,保证材料性能。与Ti/Ti2AlNb相比,制备的SiCf/Ti/Ti2AlNb叠层复合材料的比强度和比刚度分别提高了约16%和28%,实现了材料结构的轻量化。Based on the lightweight requirement for aerospace materials structure,the SiCf/Ti/Ti2AlNb laminated composites were fabricated with the raw materials of SiC fibers,Ti foils and Ti2AlNb foils by optimizing the preparation technology based on vacuum hot pressing(VHP)technology combined with the Foil-Fiber-Foil method.Microstructures of composite interface were analyzed by scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS).The specific strength and specific stiffness of the material were calculated by density measurement and tensile test.The results show that the perfect SiCf/Ti/Ti2AlNb laminated composites can be obtained when the condition is 920℃/40 MPa/1 h.The configuration of SiC fiber is uniform and the interface of Ti/Ti2AlNb is flat.TiC with thickness of 0.8μm is found in SiC/Ti interface.Bothα+βphase and B2-rich phase with good metallurgical bonding are found in Ti/Ti2AlNb interface,which is beneficial to transfer the load and ensure the material properties.Compared with Ti/Ti2AlNb,the specific strength and specific stiffness of SiCf/Ti/Ti2AlNb laminated composites are improved by 16%and 28%respectively,which is beneficial for lightweight of material structure.

关 键 词：SIC纤维 Foil-Fiber-Foil法 叠层复合材料 真空热压技术 微观组织 

分 类 号：TB331[一般工业技术—材料科学与工程]