采用粉末冶金法制备了碳化钨颗粒增强铜(WC/Cu)复合材料,研究了WC含量对WC/Cu)复合材料力学性能和微结构的影响,并考察了复合材料载流摩擦磨损性能.结果表明:随着WC质量分数增加,复合材料相对密度逐渐降低,硬度缓慢增大,电导率快速下降.WC含量较低时,大部分WC颗粒能较均匀分布于铜基体上;而WC含量较高时,WC颗粒的团聚现象较严重,团聚所形成的颗粒团体积较大.载流摩擦磨损测试中,随着WC质量分数增加,体积磨损率逐渐减小;未加载电流时,体积磨损率随载荷增大而增大;一定载荷和滑动速率时,复合材料体积磨损率随载流密度增加而增大.
WC particle reinforced Cu composites were prepared by powder metallurgy method.The effects of WC content on microstructure,mechanical properties and wear resistance of the composites under electrical current were investigated.The results indicate that with the increasing WC contents,the relative density of the composites gradually increases and the microhardness slightly improves whereas the electrical conductivity is sharply reduced.The WC particles are homogeneously dispersed in the Cu matrix for the composites with lower content of WC.When the WC content increasing,the agglomeration of the WC particles coccurs and the sizes of these agglomerates tended to be larger.The increase of WC content results in the decrease of the volume wear rate when the wear tests are performed under the electrical current.Without electrical current,the volume wear rate increases with the increasing of the load.The volume wear rate increases with the increasing electrical current density as the tests are carried out with specific load and sliding velocity.
参考文献
| [1] | 国秀花;宋克兴;梁淑华;赵培峰;张永振.制备工艺对Al2O3/Cu复合材料载流摩擦磨损性能的影响[J].材料热处理学报,2014(3):1-7. |
| [2] | 程建奕;敖学文;汪明朴;郭明星.Al_2O_3弥散粒子对Cu-Al_2O_3合金高温退火显微组织的影响[J].中国有色金属学报,2009(11):1928-1933. |
| [3] | 刘德宝;刘双进;崔春翔.添加铝对AlNp/Cu复合材料组织与热性能的影响[J].材料热处理学报,2007(2):7-11. |
| [4] | Mohsen Barmouz;Mohammad Kazem Besharati Givi;Javad Seyfi.On the role of processing parameters in producing Cu/SiC metal matrix composites via friction stir processing: Investigating microstructure, microhardness, wear and tensile behavior[J].Materials Characterization,20111(1):108-117. |
| [5] | S.F. Moustafa;Z. Abdel-Hamid;A.M. Abd-Elhay.Copper matrix SiC and Al_2O_3 particulate composites by powder metallurgy technique[J].Materials Letters,20024/5(4/5):244-249. |
| [6] | Zhao NQ;Li JJ;Yang XJ.Influence of the P/M process on the microstructure and properties of WC reinforced copper matrix composite[J].Journal of Materials Science,200415(15):4829-4834. |
| [7] | Jahangir Khosravi;Mohammad Kazem Beshrati Givi;Mohsen Barmouz;Abbas Rahi.Microstructural, mechanical, and thermophysical characterization of Cu/WC composite layers fabricated via friction stir processing[J].The International Journal of Advanced Manufacturing Technology,20145/8(5/8):1087-1096. |
| [8] | 许玮;胡锐;高媛;寇宏超;李金山;傅恒志.碳纳米管增强铜基复合材料的载流摩擦磨损性能研究[J].摩擦学学报,2010(3):303-307. |
| [9] | 杨琳;易茂中;冉丽萍.C/C-Cu复合材料的载流摩擦磨损行为[J].中国有色金属学报,2009(9):1613-1617. |
| [10] | 徐流杰;魏世忠;张永振;邢建东;龙锐.滑动率对高钒高速钢滚-滑动摩擦磨损行为的影响[J].材料热处理学报,2012(9):43-48. |
| [11] | 丁雨田;郭美华;许广济;史荣彬.单晶铜线材载流摩擦磨损行为研究[J].铸造技术,2006(12):1390-1394. |
| [12] | 郜建新;徐晓峰;国秀花;田保红;宋克兴.内氧化法制备Al2O3/Cu复合材料的载流摩擦磨损特性[J].特种铸造及有色合金,2006(07):462-464. |
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