期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 34, 期 3, 页码 561-569出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2016.11.001
关键词
Ni-based alloy; XPS; Supercritical water; High temperature corrosion; High temperature oxidation; Oxide film
资金
- Science and Technology Foundation of China [51671201, 51371174]
- Science and Technology Project of Yunnan Province
- Technology Development (Cooperation) Fund from Yunnan Wenshan Dounan Manganese Industry Co., Ltd.
- Innovation Fund of Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS)
The oxide films formed on Alloy 690 exposed to 600 degrees C supercritical water were characterized using mass measurement, X-ray diffraction, Raman spectroscopy, scanning electron microscopy equipped with energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. It was found that the mass gain of the alloy in supercritical water decreased with increasing exposure time. The oxide films have a double-layer structure, with an inner layer rich in Cr and outer layer rich in Ni and Fe after short time and long time exposure. The penetration of the oxide along the grain boundaries was observed, and the penetration depth increased with increasing exposure time. The grain boundaries and voids are the short-path of oxygen diffusion into the metal. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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