摘要
研究了4种不同Al/Si含量的Ni-Fe-Cr合金在700℃/25 MPa超临界水环境中的高温氧化行为,揭示了合金的氧化动力学、表面氧化膜组成及微观结构。结果表明,当Cr含量达到25%(质量分数)时,Ni-Fe-Cr合金在超临界水中能够形成稳定的保护性Cr_2O_3膜,合金中Si含量的增加有助于保护性氧化膜的快速形成,而较低的Al含量无法提高保护性氧化膜的化学稳定性。
The oxidation behavior of four Ni-Fe-xCr based alloys with different contents of Al/Si was studied in supercritical water at 700 ℃ under 25 MPa. Oxidation kinetics of the alloys was obtained after 200h exposure. The surface oxide scales were characterized by SEM/EDS and XRD. The results showed that a protective chromia scale formed as the content of Cr increased up to 25%(mass fraction),which was stable during the test. The strengthening phase element-Si was beneficial to the quick formation of protective chromia scale, meanwhile the Al showed little effect on the stability of protective chromia scale.
作者
谢冬柏
周游宇
鲁金涛
王文
朱圣龙
王福会
XIE Dongbai;ZHOU Youyu;LU Jintao;WANGWen;ZHU Shenglong;WANG Fuhui(Department of Forensic Science and Technology,Xinjiang Police College,Urumqi 830011,China;Laboratory of Corrosion and Protection,Institue of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;National Energy R&D Center of Clean and High-efficiency Fossil-fired Power Generation Technology,Xi′an Thermal Power Research Institute Co.,Ltd.,Xi′an 710032,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2019年第1期68-76,共9页
Journal of Chinese Society For Corrosion and Protection
基金
公安部科技强警基础工作专项(2017GABJC11)
痕迹检验鉴定技术公安部重点实验室及西安热工研究院有限公司电站清洁燃烧国家工程研究中心~~
关键词
镍基合金
Al/Si含量
超临界水
高温氧化
Ni-based alloy
Al/Si content
supercritical water
high temperature oxidation
