摘要
开展了镍基合金 Inconel617B 在 700 ℃/25 MPa 超临界水环境氧化实验研究。利用电子天平、SEM、XRD、XPS 以及 AFM 对金属氧化动力学、氧化膜微观形貌、物相成分进行了分析。结果表明:700 ℃时镍基合金 Inconel617B 的氧化动力学介于抛物线和直线规律之间。氧化物主要为 NiO、NiCr_(2)O_(4)以及 Cr_(2)O_(3),同时存在少量的Ni(OH)_(2)、CoO以及TiO_(2)。随着氧化时间的增加,氧化膜物相发生变化。三维形貌观察表明,氧化膜的生长源于金属离子的向外扩散。
Oxidation behavior of nickel-based alloy Inconel617B in 700 ℃/25 MPa supercritical water was studied by means of electron balance, SEM, XRD, XPS and AFM. The results show that the oxidation kinetics of Inconel617B at 700 ℃ obeys regulation in between parabolic and straight-line law, the formed oxide scales are composed mainly of NiO, NiCr_(2)O_(4) and Cr_(2)O_(3), and a small amount of Ni(OH)_(2),CoO and TiO_(2) are also detected. The phase constituents of the formed oxide scales varied with oxidation time. The three-dimensional morphology shows that the growth of the oxide scale can be attributed to the outward diffusion of metal ions. The growth mechanism of the oxide scale of Inconel617B in supercritica water was further discussed.
作者
朱忠亮
马辰昊
李宇旸
肖博
袁小虎
王硕
徐鸿
张乃强
ZHU Zhongliang;MA Chenhao;LI Yuyang;XIAO Bo;YUAN Xiaohu;WANG Shuo;XU Hong;ZHANG Naiqiang(Key Laboratory of Power Station Energy Transfer,Conversion and System,Ministry of Education,North China Electric Power University,Beijing 102206,China;School of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;State Key Laboratory of Long-Life High Temperature Materials,Dongfang Electric Corporation Dongfang Turbing Co.Ltd.,Deyang 618000,China;State Key Laboratory of Efficient and Clean Coal-fired Utility Boilers,Harbin Boiler Company Limited,Harbin 150046,China)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2022年第4期655-661,共7页
Journal of Chinese Society For Corrosion and Protection
基金
国家重点研发计划(2020YFF0218101)
国家自然科学基金(52071140)
中央高校基本科研业务费(2020MS007)。
关键词
镍基合金
氧化
超临界水
生长机理
氧化膜
nickel-based alloy
oxidation
supercritical water
oxidation mechanism
oxide film
