反应火焰喷涂的TiC/Fe金属陶瓷复合涂层

TiC/Fe metal ceramic composite coating by reactive flame spray

以TiFe粉和碳的前驱体(石油沥青)为原料,通过碳化制备Ti Fe C系反应喷涂复合粉末,并通过普通火焰喷涂技术成功制备了TiC/Fe金属陶瓷复合涂层;采用XRD、SEM和EDS对喷涂粉末和涂层的成分、组织结构进行了分析,同时对涂层耐磨性能进行了对比研究。结果表明:采用前驱体碳化复合技术制备的Ti Fe C系复合喷涂粉末粒度均匀、无有害相生成;喷涂所得到的TiC/Fe金属陶瓷复合涂层由片状的铁基体和弥散分布的TiC颗粒组成;TiC颗粒大致呈球形,粒度一般在0.5μm以下;相同条件下所获涂层的磨损体积大约是常规火焰喷涂Ni60涂层的1/5。

A kind of Ti-Fe-C composite powder for reactive spray using ferrotitanium and asphalt as raw materials was prepared. TiC/Fe composite coatings were synthesized and deposited by reactive flame spray(RFS). The composition and microstructure of these composite powder and coatings were employed to analyze by XRD, SEM and EDS. The wear resistance properties of the coatings were also tested. The results show that the particle of Ti-Fe-C composites powder for RFS is uniform without any impurity. The TiC/Fe composite coatings by RFS are composed of layers in which the round TiC particles are dispersed within the Fe-alloy matrix. The round TiC particle size are mostly less than 0.5 μm. The wearing capacity of Ni60 coating is five times than that of the TiC/Fe composite coatings.