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。
The W-25 Cu composite material with fine grain was obtained by the hydrothermal co-reduction method. The microstructure and the morphology variation after arc erosion were also analyzed. Results show that the microstructure of W-25 Cu composite material has an obvious densification characteristic. The fine W phase particles are surrounded by Cu phase totally. The distribution of Cu and W phases is very uniform,and the grain size of W phase is 1-3 μm. The fracture zone shows an obvious dimple toughening characteristics. In the fracture stage,many curved fine tear edges and many dense small fracture dimples are formed. After the arc erosion,the surface phase is mainly composed of Cu and W phase,and the surface is smooth without obvious holes and cracks. During the fracture closure stage,the material transfer process is mainly characterized by arc transfer,melting bridge transfer and splash evaporation.
出处
《粉末冶金工业》
CAS
北大核心
2017年第4期40-43,共4页
Powder Metallurgy Industry
基金
2017年河南省科技攻关项目(172102210237)
