【作者】 张迪； 孙彦波； 赵业青； 李焕喜； 马朝利；

【Author】 ZHANG Di,SUN Yan-bo,ZHAO Ye-qing,LI Huan-xi,MA Chao-li (Key Laboratory of Aerospace Materials and Performance,Ministry of Education, School of Materials Science and Engineering,Beihang University,Beijing 100191,China)

【机构】 北京航空航天大学 材料科学与工程学院 空天材料与服役教育部重点实验室；

【摘要】 金属Ti箔-纤维-金属Al箔经过自蔓延燃烧反应和扩散反应过程生成连续SiC纤维增强Ti-Al金属间化合物基复合材料。结果表明:该复合材料基体是层状分布的TiAl₃,TiAl₂,TiAl,Ti₃Al,α-Ti相和少量纯Ti相,SiC/基体的界面反应和Ti/Al反应同时发生,利用背散射电子（BSE）、能谱（EDS）分析界面的形貌和元素分布。SiC/基体界面处的主要反应产物是Ti,Si和C的化合物,反应层中Al元素含量少;在富Ti的α-Ti及Ti₃Al层中的SiC与基体界面反应层厚度大于富Al的TiAl₃和TiAl₂层中的SiC与基体界面反应层厚度:Ti₃Al中的SiC/基体界面层分为两层,反应产物包括TiC,Ti₅Si₃C_x,Al₄C₃Si_x,Ti₃AlC和Ti₂AlC等。更多还原

【Abstract】 Continuous SiC fibers reinforced Ti-Al intermetallic-matrix composites were prepared from Ti,Al foils and SiC fibers through self-propagating combustion reaction and diffusion reaction.The microstructure and elemental distributions in the interfacial reaction layer were examined with backscattered electron（BSE）,energy dispersive spectrometer（EDS）.The results show that the phases in lamellar matrix were TiAl₃,TiAl₂,TiAl,Ti₃Al,α-Ti and pure titanium.The SiC/matrix interfacial reaction occured simultaneously along with the reaction of Ti/Al.The main interficial products are the compounds of Ti,Si and C elements.The content of Al element is limited in the interfacial reaction zone. The SiC/matrix reaction layer in the titanium riched phase is thicker than the reaction layer in the aluminum riched phase. The reaction layer in Ti₃Al is divided into two layers.Complex compounds as TiC,Ti₅Si₃G_x,Ti₃AlC and Al₄C₃Si_x are speculated to be the interficial diffusion products.更多还原