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在Al-B4C粉末体系中通过采用低氧压熔结技术在Ti-6Al-4V合金表面成功制备出原位内生TiC-TiB2颗粒增强金属基复合材料涂层。XRD检测表明涂层主要由TiC、TiB2、TiAl3、Al2O3和Al组成,外层TiC和TiB2颗粒含量(体积分数)约为55%,各层之间表现出较强的结合能力。通过对涂层形成机制的研究,Al在涂层制备过程中主要起到类似稀释剂、催化剂、辅助剂、除氧剂和填充剂作用,为涂层的制备提供了一种更加便利的途径。
In-situ TiC-TiB2 particle reinforced metal matrix composite coatings were successfully prepared on the surface of Ti-6Al-4V alloy by low oxygen pressure sintering in Al-B4C powder system. The results of XRD showed that the coating mainly consisted of TiC, TiB2, TiAl3, Al2O3 and Al. The content of TiC and TiB2 in the outer layer was about 55%, and the bonding strength between the layers was high. Through the study of the formation mechanism of the coating, Al mainly acts as a diluent, catalyst, auxiliary agent, oxygen scavenger and filler in the coating preparation process, which provides a more convenient way for the preparation of the coating.