真空 ›› 2022, Vol. 59 ›› Issue (2): 48-54.doi: 10.13385/j.cnki.vacuum.2022.02.10
徐天杨1,2, 李振东2, 詹华1, 司彦龙1, 刘继彬1, 汪瑞军1,2
XU Tian-yang1,2, LI Zhen-dong2, ZHAN Hua1, SI Yan-long1, LIU Ji-bin1, WANG Rui-jun1,2
摘要: 为提高铜合金表面硬质薄膜的抗冲击性能,在KK3铜合金表面制备了不同厚度Cr/CrN粘结层的铬掺杂类金刚石(Cr-DLC)碳基薄膜,采用扫描电镜、拉曼光谱仪、纳米压痕仪和连续冲击试验机分别分析了 Cr-DLC薄膜的截面形貌、微观结构、力学性能以及抗冲击性能。结果表明:Cr-DLC薄膜的残余应力、弹性模量、结合强度及抗冲击性能等与Cr/CrN粘结层厚度存在密切关系;铜合金表面Cr-DLC薄膜的残余应力随着粘结层厚度的增加先降后升,当粘结层厚度为1.01μm时,薄膜的残余应力最小,仅为-0.47GPa,硬度与弹性模量分别为11.68GPa和144.54GPa;薄膜的结合强度随粘结层厚度的增加呈先升后降的趋势,当粘结层厚度为1.01μm时结合强度最高,达到了50N;经30000次连续冲击试验后,不同厚度Cr/CrN粘结层的Cr-DLC薄膜样品表面均出现冲击坑,且中心区域均出现一定面积的薄膜剥落,其中粘结层厚度为1.01μm的Cr-DLC薄膜样品冲击坑体积最小,仅为9.241×106μm3,表现出最好的抗冲击性能。综上,针对铜合金表面不同厚度Cr/CrN粘结层的Cr-DLC碳基薄膜,当Cr/CrN粘结层厚度为1.01μm,总厚度不大于8μm时,其抗冲击性能最好。
中图分类号:
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