Formation and wear behaviors of in-situ Al3Ti/Al composites using aluminum and titanium fibers under electromagnetic induction heating  

感应加热作用下铝和钛纤维原位合成Al3Ti/Al复合材料及其磨损行为研究

作　　者：MA Jun NIU Li-bin WU Hong GAO Chong AN Yu-jiao 马俊;牛立斌;武宏;高冲;安玉姣(College of Materials Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Key Laboratory of Nano-materials and Technology,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]College of Materials Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China [2]Shaanxi Key Laboratory of Nano-materials and Technology,Xi’an University of Architecture and Technology,Xi’an 710055,China

出　　处：《Journal of Central South University》2020年第12期3594-3602,共9页中南大学学报（英文版）

基　　金：Project(2015DFR50990-01)supported by International Cooperation Project of Ministry of Science and Technology of China;Projects(18JS060,18JS075)supported by the Shaanxi Key Laboratory of Nano-materials and Technology,China。

摘　　要：Under various electromagnetic induction heating powers,different Al3Ti/Al composites were fabricated by in-situ synthesis method from aluminum and titanium fibers.Microstructures and particles distribution of the composites were examined by XRD,SEM and EDS.The results show that no other intermetallic compounds beside Al3Ti can be in-situ synthesized.Around the titanium fibers,the reaction zones and diffusion zones can be obviously found.Due to the stirring of the electromagnetic function,the formation of the micro-cracks inside the reaction zone was conducive to the peeling off of the Al3Ti particles,and ensures the continuous reaction between liquid aluminum and titanium fibers,as well as the diffusion of Al3Ti particles.At the same time,there were secondary splits of Al3Ti particles located in diffusion zones.Two-body abrasion test shows that with the increase of induction heating power,the wear rates of the composites reduced and the number of grooves decreased.通过施加不同的感应加热功率,由铝和钛纤维进行原位反应,制备出Al3Ti/Al复合材料。通过XRD,SEM和EDS表征了复合材料的微观结构和颗粒分布情况。结果表明,反应产物仅为Al3Ti金属间化合物,钛纤维周围有明显的反应区和扩散区。反应区的微裂纹有利于Al3Ti颗粒的剥离,促进了液态铝与钛纤维之间的反应。由于电磁感应加热的搅拌功能,促进了Al3Ti颗粒的反应和扩散。同时,Al3Ti颗粒在扩散过程中存在二次分离与剥落。两体磨损试验表明,随着感应加热功率的加大,磨损率和沟槽数量减少,复合材料的耐磨性能提高。

关 键 词：in-situ synthesis induction heating Al3Ti intermetallic particle distribution wear behaviors 

分 类 号：TB33[一般工业技术—材料科学与工程]