汪云海,夏 春,黄春平,刘奋成,柯黎明.La2O3含量对搅拌摩擦加工制备Ni /Al复合材料组织和性能的影响[J].稀有金属材料与工程,2018,47(12):3829~3834.[Wang Yunhai,Xia Chun,Huang Chunping,Liu Fencheng,Ke Liming.Influence of La2O3 content on the microstructure and properties of Ni/Al composites fabricated by friction stir processing[J].Rare Metal Materials and Engineering,2018,47(12):3829~3834.]
La2O3含量对搅拌摩擦加工制备Ni /Al复合材料组织和性能的影响
投稿时间:2017-03-21  修订日期:2017-09-11
中文关键词:  La2O3  搅拌摩擦加工  复合材料  组织  性能
基金项目:国家自然科学基金(51465044, 51364037);江西省自然科学基金(20142BAB216019);江西省教育厅科技项目(GJJ160690)
中文摘要:
      采用搅拌摩擦加工方法在Al基体中添加不同La2O3含量的混合粉末(Ni+La2O3),制备 (Ni+La2O3)/Al复合材料。采用SEM、EDS、 EPMA及XRD对复合区微观结构及相组成进行分析,采用室温拉伸试验对 (Ni+La2O3)/Al复合材料力学性能进行了测试。结果表明,随着La2O3含量的增加,(Ni+La2O3)/Al复合材料的组织和性能先变好后变差。当La2O3添加量达到5%时,复合材料中Al3Ni增强颗粒分布均匀、颗粒数量最多,块状的Ni粉团聚减少,其抗拉强度达到最大值215MPa,相比Ni/Al复合材料(抗拉强度176MPa),其抗拉强度提高了22%;当La2O3的添加量为7%时,复合材料中Al3Ni增强颗粒含量减少,块状Ni粉团聚重新出现,抗拉强度下降至201MPa。
Influence of La2O3 content on the microstructure and properties of Ni/Al composites fabricated by friction stir processing
英文关键词:La2O3  friction stir processing  composites  microstructure  properties
英文摘要:
      : (Ni+La2O3)/Al composites were fabricated by means of adding the mixed powder of (Ni+La2O3) with different La2O3 content to the Al substrate in the Friction Stir Processing (FSP) period. The microstructures of the composite zone were analyzed by SEM and EDS, the element distribution of the composite zone were analyzed by EPMA, the phase composition was examined by XRD, the mechanical properties of the composites were tested by tensile test at room temperature. Results show that: The microstructure and properties of (Ni+La2O3)/Al composites trend to be better firstly and then worse with increasing of La2O3 contents. When the contents of La2O3 are 5%, the contents of Al3Ni particles increase and the distribution of particles becomes uniform,the massive Ni agglomerates are decreased, so the tensile strength of the composites is the highest with 215MPa, which is increased by 22% than that of Ni/Al composites(The tensile strength is 176MPa); When the contents of La2O3 are 7%, the contents of Al3Ni particles decrease and the massive Ni agglomerates reappear, the tensile strength of the composites decreased to 201MPa.
作者单位E-mail
汪云海 西南昌航空大学 轻合金加工科学与技术国防重点学科实验室 499683663@qq.com 
夏 春 西南昌航空大学 轻合金加工科学与技术国防重点学科实验室 xiachun2002@163.com 
黄春平 西南昌航空大学 轻合金加工科学与技术国防重点学科实验室 hcp98106@163.com 
刘奋成 西南昌航空大学 轻合金加工科学与技术国防重点学科实验室  
柯黎明 西南昌航空大学 轻合金加工科学与技术国防重点学科实验室  
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