反应球磨烧结制备Al2O3/Cu复合材料的组织与性能
Microstructure and Properties of Al2O3/Cu Composite Prepared by Reaction Milling Following Sintering
摘 要
以铜铝合金粉为原料,利用反应球磨并结合放电等离子烧结工艺制备了Al2O3/Cu复合材料,研究了球磨不同时间后合金粉的形貌、物相以及铝含量对复合材料组织与性能的影响。结果表明:铜铝合金粉球磨20 h后,生成了粒径为2~5 μm的类球状颗粒,Cu相衍射峰发生明显的宽化,在铜基体中原位生成了纳米α-Al2O3颗粒相;Al2O3颗粒的尺寸及其在基体中的分布与铝含量有关,随着铝含量增加,Al2O3颗粒逐渐长大、富集甚至团聚;复合材料的相对密度和导电率均随着铝含量的增加逐渐降低,显微硬度则逐渐升高;当铝的质量分数为0.7%时,复合材料具有最佳的综合性能。
Al2O3/Cu复合材料
显微硬度
导电率
reaction milling
Al2O3/Cu composite
microhardness
electrical conductivity
Abstract
Taking Cu-Al alloy powder as raw materials,Al2O3/Cu composite was prepared by reaction milling and spark plasma sintering. The morphology and phases of alloy powders after milling were studied,as well as the effects of Al contents on microstructure and properties of the composite. The results show that the spheroid powder particles with the size of 2-5 μm were generated after milling for 20 h,Cu phase diffraction peak exhibited obvious broad,and α-Al2O3 nano-particles were generated in situ in Cu matrix. The size and distribution of Al2O3 particles were affected by Al contents,and Al2O3 particles gradually grew up,enriched and agglomeration with the increase of Al contents. Relative density and electrical conductivity of the composite decreased gradually with the increase of Al contents,but the microhardness increased. When the Al content was 0.7wt%,the composite owned the best overall properties.
中图分类号 TB333
所属栏目 新材料新工艺
基金项目 重点实验室基金资助项目(9140C850201110C85);“十二五”装备预先研究项目(51326020202)
收稿日期 2013/11/1
修改稿日期 2014/8/29
网络出版日期
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备注刘贵民(1971-),男,山东阳谷人,教授,博士。
引用该论文: LIU Gui-min,LI Bin,YAN Tao,ZHENG Xiao-hui,DING Hua-dong. Microstructure and Properties of Al2O3/Cu Composite Prepared by Reaction Milling Following Sintering[J]. Materials for mechancial engineering, 2015, 39(1): 63～67
刘贵民,李斌,闫涛,郑晓辉,丁华东. 反应球磨烧结制备Al2O3/Cu复合材料的组织与性能[J]. 机械工程材料, 2015, 39(1): 63～67
被引情况:
【1】王天国,覃群, "烧结温度对铜基粉末冶金摩擦材料组织和性能的影响",机械工程材料 40, 39-42(2016)
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【7】RAJKOVIC V,BOZIC D,JOVANOVIC M T. Effects of copper and Al2O3 particles on characteristics of Cu-Al2O3 composites［J］.Materials and Design,2010,31:1962-1970.
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【13】TJONG S C. Novel nanoparticle-reinforced metal matrix composites with enhanced mechanical properties［J］.Advanced Engineering Materials,2007,8:639-652.
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