【作者】 苏中华； 彭晓东； 刘伟廷； 曾庆文； 谢卫东； 周伟；

【Author】 Su Zhonghua1,Peng Xiaodong1,Liu Weiting2 Zeng Qingwen2,Xie Weidong1,Zhou Wei1 (1. Chongqing University,College of Materials Science and Engineering,Chongqing 400045; 2. Chongqing Polycomp International Corporation,Chongqing 400082)

【机构】 重庆大学材料科学与工程学院； 重庆国际复合材料有限公司；

【摘要】 采用粉末冶金—内氧化—烧结方法制备了ZrO2弥散强化PtRh3合金。用金相显微镜、扫描电镜观测弥散强化PtRh3的微观组织结构,用EDS检测了微观成分及含量。用德国耐驰DTL402C热膨胀仪测试了合金高温膨胀性能,对比分析PtRh3弥散强化前后的高温膨胀性能差异。结果表明:ZrO2可显著改善PtRh3合金700℃以上的耐膨胀性能,强化PtRh3合金液固转变时Pt与Rh发生部分分解,用其制作的漏板使用寿命可达到一年以上。更多还原

【Abstract】 ZrO2 dispersion strengthened PtRh3 alloys were made by the way of powder metallurgy-internal oxidation-sintering. The microstructures of dispersion strengthened PtRh3 were observed by making use of the Metallographic Microscope and the Scanning Electron Microscope. The microstructure composition and content were determined by EDS. High temperature expansion performance testing on alloy were tested by Germany NETZSCH DTL402C thermal expansion instrument. The performances of PtRh3 were comparatively analyzed before and after dispersion strengthened. The results showed that expansion resistance performance of PtRh3 was significantly improved when the temperature above 700 ℃. Pt and Rh occured partial decomposition along with the liquid-solid transition of strengthened PtRh3 alloy. The lifetime of drain board made of strengthened PtRh3 alloy was more than a year.更多还原