超细WC/纳米Al2O3弥散强化铜基复合材料粉末制备及其压制特性  

Synthesis and compaction behavior of copper matrix composite powders reinforced with ultrafine WC and nano-sized Al2O3 particles

作　　者：张小红[1] 申景园 李超[2] 胡连喜[2] ZHANG Xiao-hong;SHEN Jing-yuan;LI Chao;HU Lian-xi(Wuxi Institute of Technology,Wuxi 214121,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]无锡职业技术学院,江苏无锡214121 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《粉末冶金工业》2019年第6期66-70,共5页Powder Metallurgy Industry

摘　　要：试验研究了超细WC-纳米Al2O3弥散强化Cu基复合材料粉末的机械球磨制备工艺。采用XRD、SEM、EDS等表征手段,研究了机械球磨过程WC/Al2O3/Cu粉末形貌、强化相WC与Al2O3分布形态、Cu基体晶粒尺寸的变化规律。通过室温压制试验,研究了所制备粉末的压制特性。结果表明:在球磨转速300 r/min、球料比10:1(质量比)的条件下,经过100 min球磨,可获得WC、Al2O3颗粒均匀分布的Cu基复合材料粉末,Cu基体晶粒尺寸细化到约0.4μm。机械球磨WC/Al2O3/Cu复合材料粉末具有较好的压制成形性,其压制特性可用黄培云双对数压制方程描述。The process of mechanical milling for synthesis of Cu matrix composite powders reinforced with ultrafine WC and nano-sized Al2O3 particles was experimentally investigated.The evolution of the WC/Al2O3/Cu powder morphology,the distribution of the reinforcing WC and Al2O3 phases,and the grain size of the Cu matrix,due to mechanical milling,were characterized by XRD,SEM,and EDS analysis.The compaction behavior of the composite powders was characterized by room-temperature compaction tests.The results show that,by milling for 100 min with a rotation speed of 300 r/min and a ball to powder mass ratio of 10:1,Cu-based composite powders with uniformly distributed ultrafine WC and nano-sized Al2O3 reinforcing particles and an average size of about 0.4μm for Cu crystallite grains can be obtained.In addition,the mechanically synthesized WC/Al2O3/Cu composite powders possess good compaction formability,and the compaction characteristics can be depicted by the wellknown Huang’s double-logarithmic compaction equation.

关 键 词：机械球磨 Cu基复合材料粉末 弥散强化 压制特性 

分 类 号：TB33[一般工业技术—材料科学与工程]