机械合金化改性硫化亚铁/铜合金粉末的特性

Characteristics of Mechanical Alloying Modified FeS/Cu Alloy Powders

为了解决FeS/Cu粉末冶金复合材料中FeS易团聚以及界面结合差的问题,采用机械合金化技术制备了FeS/Cu复合材料粉末。利用扫描电镜、X射线衍射仪、金相显微镜等对不同球磨时间的质量分数为6%的FeS/Cu合金粉末的混合特性、压制特性及烧结后的力学性能进行检测和分析,结果表明:机械合金化可有效改善FeS颗粒与基体合金粉末的混合均匀性,烧结后材料的密度、硬度均得到提高,FeS和Cu界面结合良好;由于FeS颗粒均匀弥散地分布在铜合金基体中,割裂了基体材料的连续性,反而使复合材料的韧性和压溃强度有所降低。

In order to solve the problems that the FeS/Cu-based powder metallurgy materials were agglomerated and the interfaces were poor after sintering,FeS/Cu-based materials were prepared by mechanical alloying technique.The mixing characteristics,pressing properties and mechanical properties after sintering of 6%mass fraction FeS/Cu alloy powders with different ball milling time were tested and analyzed by means of scanning electron microscopy,X-ray diffraction,metallographic microscope and so on.The results show that mechanical alloying may effectively improve the mixing of FeS particles and matrix alloy powder uniformity.After sintering the material density and hardness are improved,and the interface bonding of FeS and Cu possesses good quality.As the FeS particles were uniformly dispersed in the copper alloy matrix,the continuity of the matrix materials was separated,making the toughness and crushing strength of the composites reduce.