化学包覆Cu基纳米Al_2O_3复合材料的摩擦磨损行为研究
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摘要
选用纳米级Al2O3陶瓷颗粒作为增强相,采用超声波增强化学镀的方法完成对纳米Al2O3陶瓷颗粒金属铜的包覆,热压烧结成块材,并在特定的磨损条件下,对两种纳米Al2O3含量(10wt%Al2O3和30wt%Al2O3)的铜基复合材料进行摩擦磨损实验,探索纳米颗粒在陶瓷增强铜基复合材料中的增强和磨损机制。结果表明:复合材料在磨损过程中的磨损失重并不是单调增加的,而是存在两个阶段。Al2O3增强相颗粒的含量及分散性对复合材料的硬度及耐磨性有重要影响。
Using nano-sized Al2O3 ceramic particles as enhancement phase,the copper coating particles coated with nano Al2O3 were prepared by ultrasonic electroless deposition,and then were sintered into ceramic particles reinforced copper-matrix composites by hot pressing.Under the condition of specific wear and tear,the friction and wear test was studied by using copper-matrix composites with two kinds of nano Al2O3 content coating 10wt% and 30wt% of Al2O3 respectively.Enhancement and the wear mechanism of nanoparticles in ceramic reinforced copper-matrix composites was explored.The results showed that in the process of wear and tear,the wear weightless of composite materials exhibited two phases rather than monotone increasing.The content and dispersion of Al2O3 ceramic particles influenced the hardness and wear resistance of composite materials greatly.
Using nano-sized Al2O3 ceramic particles as enhancement phase,the copper coating particles coated with nano Al2O3 were prepared by ultrasonic electroless deposition,and then were sintered into ceramic particles reinforced copper-matrix composites by hot pressing.Under the condition of specific wear and tear,the friction and wear test was studied by using copper-matrix composites with two kinds of nano Al2O3 content coating 10wt% and 30wt% of Al2O3 respectively.Enhancement and the wear mechanism of nanoparticles in ceramic reinforced copper-matrix composites was explored.The results showed that in the process of wear and tear,the wear weightless of composite materials exhibited two phases rather than monotone increasing.The content and dispersion of Al2O3 ceramic particles influenced the hardness and wear resistance of composite materials greatly.
引文
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[2]曹同坤,郑建新.自润滑材料及其摩擦特性的影响因素[J].材料导报,2004,18(12):80-84.
[3]刘雪峰,赵劲松,谢建新,等.不锈钢背锡青铜梯度自润滑材料的评价[J].复合材料学报,2008,25(4):131-137.
[4]王黎钦,应丽霞,古乐.固体自润滑复合材料研究进展及其制备技术发展趋势[J].机械工程师,2002(9):23-25.
[5]陈岁元,邢蕊蕊,刘常升,等.新型铜基自润滑材料的制备[J].东北大学学报:自然科学版,2007,28(9):1285-1288.
[6]刘超峰.国内自润滑轴承用材料的研究和开发[J].铸造技术,2006,27(4):416-420.
[7]Moustafa S F,El Badry S A,Sanad A M,et al.Friction and wear of copper-graphite composites made and uncoated graphite powders[J].Wear,2002,253(7/8):699-710.
[8]Dong S R,Tu J P,Zhang X B.An investigation of the sliding wear behavior of Cu-matrix composite reinforced by carbon nano-tubes[J].Materials Science and Engineering,2001,31(3):83-87.
[9]Hirotaka K,Masahiro T,Yoshiro I,et al.Wear and mechanical properties of sintered copper-tin composites containing graphite or molybdenum disulfide[J].Wear,2003,255(1/6):573-578.
[10]丁红燕,符学龙,戴起勋,等.粉末冶金法制备Cu/Al2O3复合材料及其性能研究[J].金属热处理,2007,32(6):37-40.
[11]全永听.工程摩擦学[M].浙江大学出版社,1994:102-105.
[12]Moshkovich A,Perfilyev V,Yutujyan K,et al.Friction and wear of solid lubricant films deposited by different types of burnishing[J].Wear,2007,263(7/12):1324-1427.