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N含量对ZrCuAl(N)涂层结构及抗腐蚀性能的影响
吴玉美1,2, 葛芳芳2, 黄峰2, 王刚1
1.上海大学 材料科学与工程学院, 上海 200444;2.中国科学院宁波材料技术与工程研究所 中国科学院海洋新材料与应用技术重点实验室, 宁波 315201
摘要:
采用磁控溅射方法在ZrCuAl非晶涂层中掺杂不同含量N,采用X射线衍射仪、扫描电子显微镜、透射电子显微镜、原子力显微镜等对涂层的显微结构进行表征,采用纳米压痕仪、显微硬度仪、划痕仪评估涂层的力学性能,通过极化试验评估涂层的抗腐蚀性能。结果表明,N掺杂可将涂层的硬度提高约3倍,弹性模量提高约2倍,结合力从1.51 N增加到22.76 N,但涂层的韧性有所下降。同时,N掺杂可使涂层发生钝化现象,提高涂层的耐腐蚀能力。当掺杂N原子数分数为35.8%时,涂层经极化试验后无点蚀现象,表面保持良好的形貌,无腐蚀迹象。因此,一定含量的N掺杂能同时提高Zr基非晶涂层的力学性能和耐蚀能力。
关键词:  N含量  ZrCuAl(N)涂层  磁控溅射  力学性能  耐蚀性  钝化
DOI:10.11933/j.issn.1007-9289.20180928001
分类号:TG174.444;TG178
基金项目:国家重点研发计划(2016YFC1400605);浙江省重点研发计划(2017C01001)
Effects of N Content on Microstructure and Anticorrosion Behavior of ZrCuAl(N) Coating
WU Yumei1,2, GE Fangfang2, HUANG Feng2, WANG Gang1
1.College of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;2.Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Abstract:
Different N content were added into the ZrCuAl amorphous coating by magnetron sputtering. X-ray diffractometry, scanning electron microscopy, transmission electron microscopy and atomic force microscopy were performed to analyze the microstructure of the coatings. Meanwhile, the mechanical properties of the coatings were measured by nanoindentation, scratch tester as well as microhardness tester, and the corrosion behaviors of the coatings were evaluated by polarization experiments as well as salt spray tests. The results show that the hardness and elastic modulus of ZrCuAlN coatings increase by about 3 times and 2 times, respectively, and the adhesive strength increases from 1.51 N to 22.76 N; however, the toughness decreases slightly. Moreover, the coatings containing N atom occur passivate behavior and have better pitting resistance. When the N content is 35.8%, the coating does not exhibit pitting behavior after the polarization test, and the surface maintains good morphology without signs of corrosion. Therefore, a certain amount of N addition can simultaneously improve the mechanical properties and corrosion resistance of zirconium-based amorphous coatings.
Key words:  N content  ZrCuAl(N) coatings  magnetron sputtering  mechanical property  anticorrosion behavior  passivation