Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第23卷    第11期    总第176期    2013年11月

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文章编号:1004-0609(2013)11-3121-06
TiC添加对TiC/316L氧化行为的影响及其作用机制
蔺绍江1,熊惟皓2,石其年1,王赛玉1

(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
)

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。

 

关键词: 复合材料;TiC;氧化行为;氧化膜

Effect of TiC addition on oxidation behavior of TiC/316L composites and its mechanism
LIN Shao-jiang1, XIONG Wei-hao2, SHI Qi-nian1, WANG Sai-yu1

1. School of Mechanic and Electric Engineering, Hubei Polytechnic University, Huangshi 435003, China;
2. State Key Laboratory of Material Processing and Die & Mould Technology,
Huazhong University of Science and Technology, Wuhan 430074, China

Abstract: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.

 

Key words: composites; TiC; oxidation behavior; oxidation film

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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