Corrosion of combustion-synthesized β-SiAlONs in supercritical water

被引:4
|
作者
Yi, Xuemei [2 ]
Yamauchi, Akira [1 ]
Kurokawa, Kazuya [1 ]
Akiyama, Tomohiro [1 ]
机构
[1] Hokkaido Univ, Ctr Adv Res Energy & Mat, Kita Ku, Sapporo, Hokkaido 0608628, Japan
[2] Hokkaido Univ, Grad Sch Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan
关键词
Ceramic; Weight loss; High temperature corrosion; BEHAVIOR; OXIDATION; CERAMICS; COMBINATION; ALLOYS; NANOPARTICLES; METHANOL; STEEL;
D O I
10.1016/j.corsci.2011.11.009
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The corrosion of beta-Si(6-z)Al(z)O(z)N(8-z)s (z = 1, 2, and 3) prepared by combustion synthesis (CS) followed by spark plasma sintering (SPS) was investigated in supercritical water at 400 degrees C/30 MPa for 100 h. The corrosion behavior was studied by means of gravimetry, X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy dispersive X-ray spectrometer (EDS). The mass loss and corroded layer decreased with the increasing in z value, and the results of XRD showed the oxide formed on beta-SiAlONs (z = 1, 2, and 3) is aluminum silicate (Al2SiO5). Finally, we proposed the reaction mechanism of these materials in supercritical water. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:153 / 157
页数:5
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