镍包碳化钛复合粉末的制备及活化工艺研究

发布时间：2018-03-07 21:09

本文选题：高压氢还原　切入点：镍包碳化钛　出处：《热喷涂技术》2016年04期 　论文类型：期刊论文

【摘要】：镍包碳化钛复合粉体是一种集耐磨性、强度与韧性于一体的金属陶瓷复合材料。本文采用高压氢还原的方法制备镍包碳化钛复合粉末,采用王水作为活化剂,对碳化钛粉体进行表面活化。研究了不同活化时间对碳化钛粉体表面活化效果的影响,并以不同活化条件下的碳化钛粉体为原料,制备了镍包碳化钛复合粉体,研究了活化时间对复合粉体包覆率的影响。实验结果表明,王水作为活化剂,当活化时间达到60min时,碳化钛颗粒表面即产生了明显的台阶状活性化学表面,当活化到90min时,还会产生典型的螺旋状活性化学表面;经过活化处理产生的台阶状及螺旋状化学表面,具有催化活性。当采用活化处理60min及以上的碳化钛粉体进行包覆时,碳化钛颗粒表面可以被金属镍完整包覆。
[Abstract]:Nickel-coated titanium carbide composite powder is a kind of cermet composite with wear resistance, strength and toughness. In this paper, Ni-coated titanium carbide composite powder was prepared by high pressure hydrogen reduction, Wang Shui was used as activator. The effect of different activation time on the surface activation of titanium carbide powder was studied. The Ni-coated titanium carbide composite powder was prepared by using titanium carbide powder under different activation conditions as raw material. The effect of activation time on the coating rate of composite powder was studied. The experimental results showed that when the activation time was 60 min, the activated surface of titanium carbide particles had obvious step active chemical surface, and when activated to 90 min, the active surface of titanium carbide particles appeared obviously. A typical spiral active chemical surface can also be produced. The step and spiral chemical surfaces produced by activation treatment have catalytic activity. When the titanium carbide powder is coated with activation treatment for 60 min or more, Titanium carbide particles can be completely coated with nickel metal.
【作者单位】：中国矿业大学(北京)化学与环境工程学院;赫格纳斯(中国)有限公司;
【分类号】：TG148;TB383.3

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