引用本文:白羽,黄平,葛芳芳,黄峰.N含量对Cr-N涂层结构和抗高温水蒸汽氧化性能的影响[J].中国表面工程,2020,33(2):87~96
Bai Yu,Huang Ping,Ge Fangfang,Huang Feng.Effects of N Content on Microstructure and High-temperature Steam Oxidation Resistance of Cr-N Coating[J].China Surface Engineering,2020,33(2):87~96
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N含量对Cr-N涂层结构和抗高温水蒸汽氧化性能的影响
白羽1,2, 黄平1, 葛芳芳2, 黄峰2
1.西安交通大学 金属材料强度国家重点实验室, 西安 710049;2.中国科学院宁波材料技术与工程研究所 先进能源材 料工程实验室, 宁波 315201
摘要:
为提高锆( Zr)合金的抗高温水蒸气性能,采用磁控溅射技术,通过改变沉积过程中的 N2 流量,在 Zr 合金表面制备不同 Cr/ N 比的涂层,研究不同 N 含量对涂层结构和抗高温水蒸汽氧化性能的影响。 利用扫描电镜、 能谱仪、X 射线衍射仪对涂层氧化前后的表面与截面形貌、化学组成、相结构进行观察和分析,利用纳米压痕仪测量涂层的力学性能,通过高温水蒸汽氧化试验评估涂层的抗氧化性能。 结果表明,随 N 含量的增加,涂层的生长结构分别为“疏松柱状” 、“致密非柱状” 、“致密柱状” 。 其中,“ 致密非柱状” 结构的涂层具有最高的硬度,是“ 疏松柱状”涂层的 2 倍。 同时,该涂层在氧化过程中生成的 Cr2O3 氧化层均匀致密,可以有效防护 Zr 合金基底 6 h 不被氧化。
关键词:  N 含量  Cr-N 涂层  磁控溅射  微观结构  抗高温水蒸汽氧化性能
DOI：10.11933/j.issn.1007-9289.20191231002
分类号:TG174.444
文章编号:1007-9289(2020)02-0087-10
文献标识码:A
基金项目:国家自然科学基金(51871231)
Effects of N Content on Microstructure and High-temperature Steam Oxidation Resistance of Cr-N Coating
Bai Yu1,2, Huang Ping1, Ge Fangfang2, Huang Feng2
1.State Key Laboratory for Mechanical Behavior of Metal Materials, Xi’ an Jiaotong University, Xi’ an 710049 , China;2.Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201 , China
Abstract:
In order to improve the safety of zirconium fuel cladding under accident conditions, three different kinds of micro- structure Cr-N coatings were prepared by magnetron sputtering on zirconium alloy substrates. The surface morphology, cross-sec- tional structure, chemical composition and phase structure of the coatings were characterized by scanning electron microscope, energy dispersive spectrometer and X-ray diffractometry. The mechanical properties of the coatings were measured by nanoindent- ation. The oxidation resistance of the coatings were evaluated by high temperature steam oxidation test. The results show that the growth structures of coatings are " porous columnar" , " dense non-columnar" and " dense columnar" , with the increase of N con- tent, respectively. The hardness of " dense non-columnar" coating is 2 times higher than the " porous columnar" . At the same time, the oxidation scale of the coating with " dense columnar" structure is uniform and dense during the oxidation process, which can effectively protect Zr alloy from oxidation for 6 hours.
Key words:  N content  Cr-N coatings  magnetron sputtering  microstructure  high-temperature steam oxidation resistance
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