PTFE/Cu材料动态压缩特性  

Dynamic compressive behavior of PTFE/Cu composite materials

作　　者：汤雪志 王志军[1] 张雪朋 徐永杰[1,2] TANG Xuezhi;WANG Zhijun;ZHANG Xuepeng;XU Yongjie(College of Mechatronic Engineering,North University of China,Taiyuan 030051,China;Chongqing Hongyu Precision Industrial Co.,Ltd.,Chongqing 402760,China)

机构地区：[1]中北大学机电工程学院,太原030051 [2]重庆红宇精密工业集团有限公司,重庆402760

出　　处：《粉末冶金技术》2024年第2期153-158,164,共7页Powder Metallurgy Technology

基　　金：山西省高校科技创新项目(2019L602);山西省基础研究计划资助项目(2021690)。

摘　　要：通过冷等静压和冷压烧结制备出六种不同密度的聚四氟乙烯(polytetrafluoroethylene,PTFE)/Cu复合材料,并采用霍普金森系统研究了密度和制备方法对PTFE/Cu动态力学性能影响。结果表明,冷压烧结试样在其烧结过程中发生纵向膨胀,导致密度降低,且试样表面生成一层金属膜;冷压烧结试样的动态压缩性能优于冷等静压试样;冷压烧结后的PTFE/Cu材料中PTFE晶体发育更好,对Cu颗粒包裹力更大,界面结合力更高,提升了冷压烧结PTFE/Cu材料的力学性能。Six kinds of polytetrafluoroethylene(PTFE)/Cu materials with the different Cu contents were prepared by cold isostatic pressing and cold press sintering,respectively.The effects of density and preparation method on the dynamic mechanical properties of PTFE/Cu materials were studied by split Hopkinson bar testing(SHPB).The results show that the density of the cold press sintered specimen decreases due to the longitudinal expansion during the cold press sintering process,and a metal film is formed on the specimen surface.The dynamic mechanical properties of the cold press sintered specimen are better than that of the cold isostatic pressed specimen.The PTFE crystals in the cold press sintered PTFE/Cu materials are better developed,and the PTFE encapsulation force on the Cu particles is greater,resulting in the greater interfacial bonding force and improving the mechanical properties of the cold press sintered PTFE/Cu materials.

关 键 词：PTFE/Cu复合材料 冷等静压 冷压烧结 动态压缩性能 

分 类 号：TF124.5[冶金工程—粉末冶金]