CAJ | 학술논문

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。
채용분말야금법제비TiC과립함량불동적316L불수강복합재료，연구복합재료재800℃공기중적항온양화행위，분석TiC대복합재료양화행위적영향화TiC적작용궤제。결과표명：시양표면형성적양화막이TiO2、Cr2O3、Fe3O4화FeCr2O4위주요조성상。TiC적인입가이도치부Cr리자보호성양화막적형성，유리우복합재료항양화성능제고；단첨가과다적TiC회도치TiC과립적취집，TiC양화반응적기체재과립취집적구역집중산생화석방，강저료양화막적치밀정도，악화료시양적항양화성능。여기타시양상비，10%TiC/316L복합재료시양구유교호적항양화성능。
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.