光伏电力开关用W-25Cu复合材料的微观组织和抗电弧侵蚀性研究

发布时间：2018-04-08 21:24

  本文选题：W-Cu复合粉　切入点：显微组织　出处：《粉末冶金工业》2017年04期

【摘要】：通过水热-共还原法制备细晶W-25Cu复合材料,并分析其微观组织和电弧侵蚀后组织形态的变化。结果表明:W-25Cu复合材料的显微组织具有明显的全致密化特点,Cu相将细小W颗粒全部包围,Cu相与W相的分布状态非常均匀,W相的晶粒尺寸为1~3μm,断口区域表现出明显的韧窝断裂特征,断裂阶段还生成了众多弯曲的细密撕裂棱,形成了许多稠密的细小断口韧窝。经电弧侵蚀后,表面物相构成以Cu、W两相为主,表面形貌较为平整,未出现明显的孔洞与裂纹结构。在断裂闭合阶段,材料转移过程基本表现为电弧转移、熔桥转移及喷溅蒸发这几种类型。
[Abstract]:Fine grained W-25Cu composites were prepared by hydrothermal co-reduction method and the microstructure and morphology of the composites after arc erosion were analyzed.The results show that the microstructure of the WW-25Cu composite has obvious characteristics of full densification. The distribution of the fine W particles around the Cu phase and the W phase is very homogeneous. The grain size of the W phase is 1 ~ 3 渭 m, and the fracture area shows obvious dimple fracture characteristics.During the fracture stage, many curved fine tearing edges were formed, and many dense fine fracture dimples were formed.After arc erosion, the surface phase composition is mainly CuW two-phase, the surface morphology is relatively flat, and there is no obvious pore and crack structure.At the stage of fracture closure, the material transfer process is characterized by arc transfer, fusion bridge transfer and spatter evaporation.
【作者单位】： 河南广播电视大学机电工程学院;郑州信息科技职业学院机械工程学院;
【基金】：2017年河南省科技攻关项目(172102210237)
【分类号】：TB331;TM564
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本文编号：1723390