Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第20卷    第z1期    总第1期    2010年10月

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文章编号:1004-0609(2010)S1-s1055-05
SiC纤维增强Ti-Al金属间化合物基复合材料的界面反应
张  迪,孙彦波,赵业青,李焕喜,马朝利

(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,北京100191)

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,Ti5Si3Cx,Al4C3Six,Ti3AlC和Ti2AlC等。

 

关键字: Ti-Al金属间化合物基复合材料;SiC纤维;界面反应;微叠层结构

Interface reaction of SiC fibers reinforced Ti-Al
intermetallic-matrix composites
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

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, Ti5Si3Cx, Ti3AlC and Al4C3Six are speculated to be the interficial diffusion products.

 

Key words: Ti-Al intermetallic-matrix composites; SiC fibers; interfacial reaction; micro-lamellar structure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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