TiC添加对TiC/316L氧化行为的影响及其作用机制  

Effect of TiC addition on oxidation behavior of TiC/316L composites and its mechanism

作　　者：蔺绍江[1] 熊惟皓[2] 石其年[1] 王赛玉[1] 

机构地区：[1]湖北理工学院机电工程学院,黄石435003 [2]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《中国有色金属学报》2013年第11期3121-3126,共6页The Chinese Journal of Nonferrous Metals

基　　金：湖北省自然科学基金资助项目(2012FFC019);湖北省教育厅科研计划资助项目(B20123002)

摘　　要：采用粉末冶金法制备TiC颗粒含量不同的316L不锈钢复合材料,研究复合材料在800℃空气中的恒温氧化行为,分析TiC对复合材料氧化行为的影响和TiC的作用机制。结果表明:试样表面形成的氧化膜以TiO2、Cr2O3、Fe3O4和FeCr2O4为主要组成相。TiC的引入可以导致富Cr离子保护性氧化膜的形成,有利于复合材料抗氧化性能提高;但添加过多的TiC会导致TiC颗粒的聚集,TiC氧化反应的气体在颗粒聚集的区域集中产生和释放,降低了氧化膜的致密程度,恶化了试样的抗氧化性能。与其他试样相比,10%TiC/316L复合材料试样具有较好的抗氧化性能。TiC/316L stainless steel composites with different particle contents were prepared by powder metallurgy. The isothermal oxidation behavior of TiC/316L composites sintered at 800℃in air was investigated. The effect of TiC on the oxidation behaviors of composites and the mechanism of TiC during the oxidation of composites were analyzed. The results show that the oxidation layer formed on the surface of samples mainly consists of TiO2, Cr2O3, Fe3O4 and FeCr2O4. TiC additions result in the formation of Cr-ion-riched oxide film which is beneficial to improving the oxidation resistance of the composites. However, the composites with too much TiC additions cause the agglomeration of TiC particles, which results the generation of a large quantity of gas formed by the TiC oxidation react in the particle gathered area, thereby reduces the densification of oxidation film, and causes the deterioration of the oxidation performance. Compared with other specimens, the composites with 10%TiC additions possesses excellent oxidation resistance.

关 键 词：复合材料 TiC氧化行为 氧化膜 

分 类 号：TB331[一般工业技术—材料科学与工程]