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Understanding the role of Pt addition on structure and thermal stability of CrWN glass molding coating in nitrogen molding atmosphere
Zhang, Weilun1; Yang, Di1; Gong, Feng2; Chen, Yongjun1; Chen, Tian3; Xie, Zhiwen1; Yang, Sirui4
2024-02-01
摘要A novel Pt doping was designed to improve the thermal stability of CrWN coating in a nitrogen atmosphere. The deposited CrWN coating possessed a multilayer structure and a coherent growth mode, resulting in considerable mechanical strength and large size grain. An uneven atomic migration also occurred during the coating depo-sition resulting in a coarse cluster surface. The W atom enrichment layer was rapidly oxidized during the ni-trogen annealing and thus led to serious mechanical degradation. The doping of Pt atoms effectively blocks the coherent growth of the grains, which creates a significant mixing effect, leading to a smooth surface with uniform element distribution. Although local incoherent growth compromised the mechanical behavior of CrWN-Pt coating, but the prominent pinning effect of dispersed Pt oxides can reduce oxidative erosion rate and stabilize the oxide layer up to some extent during nitrogen annealing.
关键词CrWN coating Pt doping Nitrogen annealing Growth structure Thermal stability Precision glass molding
DOI10.1016/j.vacuum.2023.112815
发表期刊VACUUM
ISSN0042-207X
卷号220页码:11
通讯作者Gong, Feng(gongfeng@szu.edu.cn) ; Chen, Yongjun(chenyongjun-net@163.com) ; Xie, Zhiwen(xzwustl@126.com)
收录类别SCI
WOS记录号WOS:001127442700001
语种英语