Ti-6Al-4V合金表面原位内生（Ti3SiC2+TiB2）p/Al基复合材料涂层制备  

In Situ Synthesis of （Ti3SiC2+TiB2）p/Al Matrix Composite Coating Fabricated on Ti-6Al-4V Alloy

作　　者：李伟[1] 周伟[2] 赵宇光[2] Li Wei;Zhou Wei;Zhao Yuguang(Department of Material Engineering,Zhengzhou Technical College;Key Laboratory of Automobile Materials of Ministry of Education,Department of Materials Science and Engineering,Jilin University)

机构地区：[1]郑州职业技术学院材料工程系 [2]吉林大学材料科学与工程学院汽车材料教育部重点实验室

出　　处：《特种铸造及有色合金》2019年第11期1235-1239,共5页Special Casting & Nonferrous Alloys

基　　金：吉林省自然科学基金资助项目(20020628-1)

摘　　要：在Al-Si-B4C粉末体系下利用低氧压熔结技术成功地在Ti-6Al-4V合金表面制备出原位内生(Ti3SiC2+TiB2)P/Al基复合材料涂层。结果表明,涂层主要由高体积分数的Ti3SiC2和TiB2复合增强体组成的外层及Al3Ti和Al组成的内层所构成,涂层相分层分布明显,Al在制备过程中稀释了各反应物浓度,起到了稀释剂作用,且促进了反应相生成,起到了催化剂作用,降低了生成TiB2、Ti3SiC2反应起始温度,起到了辅助剂作用,消耗了加热环境中残存氧,起到了除氧剂作用,并促进了涂层致密化,起到了填充剂的作用。A coating reinforced with in situ synthesis of Ti3SiC2-TiB2 particulates has been fabricated successfully on the Ti-6Al-4V alloy by the low oxygen partial pressure fusing technique in the Al-Si-B4C powders system.The results reveal that the coating consists of two layers,that is the outer layer consists of high volume fraction of Ti3SiC2,TiB2 and the inner of TiAl3 and Al layer with the obvious layered distribution of phase composition.The role of aluminum is served as a diluent agent through decreasing the molar fraction of reactant in slurry,as a activator agent through promoting the coating formation,as a assistant agent through decreasing the reactive temperature for Ti3SiC2 formation,as a deoxidant agent through removing the oxygen in heating system,and as a stuffing agent through favoring the densification of coating during the coating fabrication.

关 键 词：复合材料 原位内生 TI3SIC2 TIB2 颗粒 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TP331[金属学及工艺—金属材料]