工艺参数对SHS法制备TiC-Ni(Mo)金属陶瓷复合材料的影响  

Effects of SHS Processing Parameters on Preparation of TiC-Ni(Mo)Cermet Composite Coating

作　　者：张啸宇[1] 谭俊[1] 任伟[2] 董美伶 苏宏艺 

机构地区：[1]装甲兵工程学院再制造技术重点试验室,北京100072 [2]冶金部钢铁研究总院,北京100081 [3]哈尔滨工程大学表界面研究所,哈尔滨150001

出　　处：《中国表面工程》2015年第5期100-104,共5页China Surface Engineering

基　　金：军队科研计划项目(40401050201)

摘　　要：为了研究预压坯相对密度、预热温度、反应物配比、孔隙率等工艺参数对TiC-Ni（Mo）铝基金属陶瓷复合材料高温合成过程的影响作用,采用自蔓延燃烧合成（SHS）技术在7A52铝合金表面制备了TiC-Ni（Mo）金属陶瓷复合涂层,利用扫描电镜（SEM）、X射线衍射分析（XRD）对涂层的物相结构进行了分析。结果表明：体系的燃烧速度随预压坯相对密度的提高呈先增后减的趋势,预压坯的最佳相对密度约为55%;体系的燃烧温度随预热温度增长而增长,最佳预热温度区间在400~450K;体系的绝热温度随体系中Ni-Mo含量的提高而降低,最合适的配比方案为TiC-20Ni（Mo）。To study the influence of technological parameters, such as relative density of the perform, preheating tern perature and reactant ratio, on composite coating, the TiC-Ni （Mo） cermet composite coating was produced on 7A52 aluminum alloy by self-propagating high-temperature synthesis （SHS）. The phase constitution of the coating was investi- gated by means of scanning electron microscope （SEM） and X-ray diffraction （XRD）. The results show that, with the increase of the relative density of the perform, the combustion velocity first increases and then decreases, and the best relative density is about 55%. The combustion temperature increases with the increase of the preheating temperature, and the best preheating temperature is in a range in 400 to 450 K. The adiabatic temperature decreases with the increase of the content of Ni-Mo, and the most suitable reactant ratio is TiC-20Ni （Mo）.

关 键 词：自蔓延燃烧合成 复合涂层 预压坯相对密度 预热温度 反应物配比 

分 类 号：TG174.44[金属学及工艺—金属表面处理]