原位生成TiC制备弥散强化铜材料.pdfVIP

学兔兔 铸 造 May 2009 · 486· F0UNDRY VoI．58 No：5 原位生成TiCf~lJ备弥散强化铜材料 汪志斌，谭敦强，王 巍，余方新 (南昌大学材料科学与工程学院，江西南昌330031) 摘要：采用将Ti粉、石墨粉、铜粉混合球磨，把粉末制成压片，加入到铜熔体中，利用铜熔体的高温使压片发生热爆 反应的方法，制备TiC弥散强化铜，研究预压块中Ti／C原子数比值，TiC体积分数对试验结果的影响并对TiC形成机制初 步探讨。结果表明，这种方法制备的特点是TiC颗粒细小，对于同--Ti／C原子比值，TiC颗粒在铜熔体中体积分数为5％ 较2％时，得到的弥散效果更好，在预压块中，当Ti／C原子数比值为2．0时，得到的试验效果较理想。 关键词：原位生成；弥散强化；碳化钛；铜基复合材料 中图分类号：TG146．1 l 文献标识码：A 文章编号：1001—4977(2009)05—0486—03 Preparation of I n—-Situ TiC Particle Dispersion--Strengthened Copper Matrix Com posites WANG Zhi-bin，TAN Dun—qiang，WANG Wei，YU Fang—xin (School of Materials Science and Engineering，Nanchang University，Nanchang 330031，Jiangxi，China) Abstract：tanium powder，graphite powder and copper powder were accurately weighed，mixed and milled to attain different Ti／C ratios in moles．The powder mixture was added into the melting copper after pressed lnto compact．The high temperature of the melting copper makes the titanium in the compact react with graphite drastically．s0 as to prepare TiC particle dispemion strengthened copper．The effects of different Ti／C ratios and volume fractions of TiC in the compacts on the composite were studied．The analysis of the formation mechanism of in．situ reinforced TiC phase also was conducted．Results show that the TiC particles are fine and dispersed，and when the Ti／C ratio is 2．0 the optimaI dispersion effect can be obtained．Under the same Ti／C ratio．the TiC particles dispersed better when its volume fraction is 5％than that of 2％． Key words：in-situ synthesis；dispersion strengthened；titanium carbide；copper matrix composite