(哈尔滨工业大学 材料科学与工程学院， 哈尔滨 150001)
摘 要: 对真空热压烧结的ZrO2(2%Y2O3)/316L（摩尔分数）不锈钢复合材料进行了微观组织研究。 结果表明： 细小的ZrO2颗粒均匀地分布于不锈钢颗粒之间， 不锈钢抑制了其周围的ZrO2晶粒的生长； 对于1250℃烧结的复合材料， 不锈钢附近的ZrO2晶粒细小， 为形状规则的t相， 远离不锈钢的ZrO2多数已发生相变， 为“N”字型或者相变孪晶/m/-ZrO2相。
关键字: 不锈钢复合材料； 微观组织； t/m-ZrO2
（School of Materials Science and Engineering,
Harbin Institute of Technology,Harbin 150001, China）
Abstract:Dense ZrO2 (2Y)/316L stainless steel composites were prepared by vacuum hot-pressing sintering and their microstructures were studied. The results show that fine ZrO2 particles distribute uniformly among stainless steel particles in the composites. The stainless steel particles restrain the growth of the ZrO2 particles nearby. In the composites sintered at 1250℃, ZrO2 particle grain near the steel matrix is fine and regular, and remains as t-ZrO2. On the contrary, ZrO2 far away from the matrix has mostly transformed to ‘N’-shaped or twin m-ZrO2.
Key words: stainless steel composites; microstructure; t/m-ZrO2
