3、Si梯度复合材料;颗粒增强;耐磨性;磨损机制+ 中图分类号:TG146.2 1;TB333 文献标志码:AFriction andwearproperties of particle reinforced graded aluminummatrix compositesCHENCongcong,CHENGang,YANHongge,SUBin (CollegeofMaterialsScience and Engineering,Hunan University,Changsha410082,China)Abst
4、ract:The Al17Sifunctionallygradedmaterial(FGM)with SiCvolume fraction of0−30%continuously were synthesizedusingnewspraydeposition technique.Furthermore,themicrostructure,hardnessand wearabilityofthis functionallygraded materialwere studied with SEM, MHV−2000
5、 HerveyhardnesstesterandMG−2000 pinondiscfriction and weartestingmachine.The resultsshowthatthe frictioncoefficientdecreaseswith increasingthe applied load and slidingspeed.The wearrate rises with the increaseofappliedload anditreachesthemaximumatspeed of500
6、r/min firstly,and then falls withincreasing the slidingspeed.Because ofthe existence ofdefects,such asthe hole,themainly wearwayofthedeposition is abrasive and delamination,whilethecomposites afterhotpressingismainlyabrasiveand adhesive.Thehardness and wearr