| 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TiCNi（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TiCNi(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400~450 K；体系的绝热温度随体系中NiMo含量的提高而降低，最合适的配比方案为TiC20Ni(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 |
| DOI：10.11933/j.issn.1007-9289.2015.05.015 |
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| Effects of SHS Processing Parameters on Preparation of TiC-Ni(Mo) Cermet Composite Coating |
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ZHANG Xiaoyu, TAN Jun, REN Wei, DONG MeiLing, SU Hongyi1,2,3
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1. Science and Technology on Remanufacturing Laboratory, Academy of Armored Forces Engineering;2. Central Iron and Steel Research Institute;3. Institute of Surface and Interface, Harbin Engineering University
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| Abstract: |
| To study the influence of technological parameters, such as relative density of the perform, preheating temperature and reactant ratio, on composite coating, the TiCNi (Mo) cermet composite coating was produced on 7A52 aluminum alloy by selfpropagating hightemperature synthesis (SHS). The phase constitution of the coating was investigated by means of scanning electron microscope (SEM) and Xray 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 NiMo, and the most suitable reactant ratio is TiC20Ni (Mo). |
| Key words: selfpropagating hightemperature synthesis(SHS) composite coating relative density of perform preheating temperature reactant ratio |
