The in situ synthesis and wear performance of a metal matrix composite coating reinforced with TiC–TiB2 particulates, formed on Ti–6Al–4V alloy by a low oxygen partial pressure fusing technique
The in situ synthesis and wear performance of a metal matrix composite coating reinforced with TiC–TiB2 particulates, formed on Ti–6Al–4V alloy by a low oxygen partial pressure fusing technique
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DOI：
10.1016/j.surfcoat.2007.07.025
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发表时间：
2008-02
影响因子：
5.4
通讯作者：
W. Zhou;Y. Zhao;W. Li;X. Mei;Q. Jiang
中科院分区：
文献类型：
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作者：
W. Zhou;Y. Zhao;W. Li;X. Mei;Q. Jiang
为了提高Ti-6Al-4V合金的耐磨性，采用低氧分压熔凝技术，利用Al、Ti和B4 C的原位反应，成功制备了TiC-TiB 2颗粒增强金属基复合材料涂层。结果表明，B4 C含量的增加不利于涂层的形成，不利于界面应力的形成;而TiC粉作为稀释剂的加入有利于涂层的形成，少量Y2 O3的加入可以大大提高涂层的结合力。在销盘磨损试验中，涂层的磨损量仅为Ti-6Al-4V合金的1/12，涂层的磨损机制为轻微剥落、粘着磨损和磨粒磨损的混合型。
A metal matrix composite coating reinforced with TiC–TiB2particulates has been successfully fabricated utilizing the in situ reaction of Al, Ti and B4C by the low oxygen partial pressure fusing technique to improve the wear resistance of Ti–6Al–4V alloy. The results show that increasing the B4C content is adverse to forming the coating for the formation of interfacial stress; however, the addition of TiC powder as a diluent can favor the formation of this coating and the addition of small amounts of Y2O3can greatly improve the adhesion of the coating. After a pin-on-disc wear test, the wear mass loss of the coating is only about 1/12 that of the Ti–6Al–4V alloy and the wear mechanism of coating is a mixed type of slight peeling-off, adhesion and abrasion.