TiC/Al复合材料在锌液中均匀化机理分析  

Uniformity Mechanism of TiC/Al Composites in Zinc Melt

作　　者：王香 于德志 连晓明 李庆芬[1] 

机构地区：[1]哈尔滨工程大学机电工程学院,哈尔滨150001 [2]青岛华威风力发电有限公司,青岛266061

出　　处：《宇航材料工艺》2006年第4期50-53,共4页Aerospace Materials & Technology

基　　金：哈尔滨工程大学基础研究基金项目(HEUFT04011)

摘　　要：采用自蔓延高温合成(SHS)法制备高TiC颗粒含量的TiC/A l复合材料。利用自制的实验装置研究复合材料中TiC颗粒在静止锌液中的均匀化过程。结果表明:当锌液温度低于铝的熔点时,TiC/A l复合材料置于锌液后,锌向其内部扩散,引起复合材料表层内液相线温度降低,当表层内A l-Zn合金的液相线温度等于或低于锌液温度时,A l-Zn合金便处于熔融状态,TiC颗粒随其一起从TiC/A l复合材料块上脱落,并不断地向锌液内部传输,最终均匀分布在锌液中;而当锌液温度高于铝熔点时,TiC/A l复合材料置入后,锌和铝同时进行扩散,但是当复合材料表面温度达到铝熔点时,铝开始熔化,铝的熔化导致TiC颗粒的脱落,脱落下来的TiC颗粒不断向锌液内部传输,最终均匀分布在锌液中。TiC/Al composites with high TiC particle content is prepared by SHS （Self-propagating High-temperature Synthesis）process. The uniform distribution process of TiC particles in the stationary zinc melt is studied and analyzed by using self-made experimental equipment. The results show that zinc diffuses into the TiC/Al composites after they are placed in the zinc melt at temperatures below the melting point of aluminum, which leads to the decrease of the liquidus temperature of Al - Zn alloy in the surface layer of TiC/Al composites. When the liquidus temperature of Al - Zn alloy is equal to or below the temperature of zinc melt, Al - Zn alloy melts and TiC particles drop with it from the composites and then transfer into the zinc melt and finally they are distributed uniformly in it; while zinc diffuses into the TiC/Al composites as well as aluminum into the zinc melt after the TiC/Al composites are placed in the zinc melt at temperatures upon the melting point of aluminum. When temperature of the TiC/Al composites surface layer reaches to the aluminum melting point, aluminum melts and TiC particles drop together with it from the TiC/Al composites and then transfer into the zinc melt and they are finally distributed uniformly in it.

关 键 词：TIC/AL复合材料 锌合金 均匀化过程 

分 类 号：TB33[一般工业技术—材料科学与工程] TG174.443[金属学及工艺—金属表面处理]