熔铸-原位合成TiC／7075复合材料的腐蚀性能  

Corrosive Properties of TiC/7075 Composite Prepared by Melt In-situ Synthesis

作　　者：孙淼[1] 国大鹏[2] 杨滨[3] 

机构地区：[1]国家知识产权局专利局专利审查协作北京中心,北京100081 [2]北京航空材料研究院,北京100095 [3]北京科技大学新金属国家重点实验室,北京100083

出　　处：《热加工工艺》2012年第8期112-116,共5页Hot Working Technology

摘　　要：采用熔铸-原位合成法制备了TiC/7075复合材料,并对其腐蚀性能进行了研究。结合电化学方法和盐雾腐蚀试验研究了原位合成TiC颗粒对TiC/7075复合材料在3.5%NaCl水溶液中腐蚀性的影响,作为比较,对7075铝合金的腐蚀性能也做了相应研究。结果表明,TiC/7075复合材料较基体7075铝合金在3.5%NaCl水溶液有较大的腐蚀敏感性,该复合材料腐蚀加速的原因是TiC与Al间以及富Cu相与贫Cu相间的电偶腐蚀。The TIC/7075 composite was synthesized by melt in-situ reaction method and the corrosive properties of the composite were studied. The influences of in-situ TiC particles reinforcements on the corrosion characteristics of TIC/7075 composite in 3.5%NaCl aqueous solution were investigated with electrochemical method and salt spray test. The corrosive nature of 7075 alloy was also investigated for comparison. The results show that TIC/7075 composite are more susceptible to corrosion than its matrix alloy in 3.5%NaCl aqueous solution. The reasons to increase the speed of eroding the composite materials are the galvanic corrosions between TiC particles and Al matrix or between copper-rich phases and copper-poor phases.

关 键 词：原位合成 TIC颗粒 7075复合材料 腐蚀性能 

分 类 号：TG302.3[金属学及工艺—金属压力加工]