中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2012年
7期
1588-1593
,共6页
曹国剑%许虹宇%郑镇洙%耿林%奈贺正明
曹國劍%許虹宇%鄭鎮洙%耿林%奈賀正明
조국검%허홍우%정진수%경림%내하정명
Ni3Al%复合材料%晶粒细化%氧化%机械合金化
Ni3Al%複閤材料%晶粒細化%氧化%機械閤金化
Ni3Al%복합재료%정립세화%양화%궤계합금화
nickel aluminides%composites%grain refinement%oxidation%mechanical alloying
采用放电等离子烧结法制备(TiB2+TiC)/Ni3Al复合材料.在950℃下烧结的(TiB2+TiC)/Ni3Al复合材料的组织比在1050℃下烧结的(TiB2+TiC)/Ni3Al复合材料的组织更细小.对烧结温度分别为950℃和1050℃的复合材料在900 ℃下进行循环氧化性能测试.结果表明,在950℃下烧结的复合材料的循环氧化质量损失要小于在1050℃下烧结的复合材料的.晶粒细化有助于在氧化过程汇总的选择性氧化,使得连续的TiO2和Al2O3氧化膜得以在复合材料表面形成,从而提高复合材料的抗氧化性能.
採用放電等離子燒結法製備(TiB2+TiC)/Ni3Al複閤材料.在950℃下燒結的(TiB2+TiC)/Ni3Al複閤材料的組織比在1050℃下燒結的(TiB2+TiC)/Ni3Al複閤材料的組織更細小.對燒結溫度分彆為950℃和1050℃的複閤材料在900 ℃下進行循環氧化性能測試.結果錶明,在950℃下燒結的複閤材料的循環氧化質量損失要小于在1050℃下燒結的複閤材料的.晶粒細化有助于在氧化過程彙總的選擇性氧化,使得連續的TiO2和Al2O3氧化膜得以在複閤材料錶麵形成,從而提高複閤材料的抗氧化性能.
채용방전등리자소결법제비(TiB2+TiC)/Ni3Al복합재료.재950℃하소결적(TiB2+TiC)/Ni3Al복합재료적조직비재1050℃하소결적(TiB2+TiC)/Ni3Al복합재료적조직경세소.대소결온도분별위950℃화1050℃적복합재료재900 ℃하진행순배양화성능측시.결과표명,재950℃하소결적복합재료적순배양화질량손실요소우재1050℃하소결적복합재료적.정립세화유조우재양화과정회총적선택성양화,사득련속적TiO2화Al2O3양화막득이재복합재료표면형성,종이제고복합재료적항양화성능.
(TiB2+TiC)/Ni3Al composites were prepared by mechanical alloying of elemental powders and subsequently spark plasma sintering.Microstructure of (TiB2+TiC)/Ni3Al composite sintered at 950 ℃ was finer than that of composite sintered at 1050 ℃.The influence of grain size on cyclic oxidation behavior was investigated.Cyclic oxidation results showed that the composite sintered at 950 ℃ had smaller mass gains than the composite sintered at 1050 ℃.XRD and EDS results indicate that finer grain size is beneficial for increasing the oxidation resistance by improving the formation of a continuous TiO2 outer layer and a continuous Al2O3 inner layer on the surface of the composites sintered at 950 ℃.
