文献类型：期刊文献

英文题名：High temperature oxidation of HP40 alloy under H2-H2O and air atmospheres: a surface study

作者：Bao, Binbin[1];Liu, Jinglei[1];Zhang, Kai[1];Xu, Hong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：49

期号：9

起止页码：873

外文期刊名：SURFACE AND INTERFACE ANALYSIS

收录：;EI(收录号：20171903645086);WOS:【SCI-EXPANDED(收录号:WOS:000407288800010)】；

基金：This work is supported by the Research Fund for the Doctoral Program of Higher Education of China (20110074110009) and Sinopec Corp., China.

语种：英文

外文关键词：selective oxidation; H-2-H2O; MnCr2O4; HP40; chemical valence state

摘要：In the present work, high temperature oxidation of HP40 alloy was carried out at 1050 degrees C under H-2-H2O and air atmospheres; the influence of atmosphere on surface morphology and composition was studied. Octahedral crystals with considerable spalled regions are present on the surface of alloy oxidized under air, the oxide scale composes of MnCr2O4, Cr2O3 and (Fe, Ni)Cr2O4 and spalled regions exhibit base alloy and SiO2-rich regions. The surface of alloy oxidized under H-2-H2O is fully covered by small granular crystals and blade-type structures without spallation, and the oxide scale composes of MnCr2O4 and Cr2O3. Moreover, X-ray photoelectron spectroscopy analysis shows considerable difference in chemical valence states of Mn, Cr and O elements on both alloy surfaces, and hydroxyl compounds exist on the alloy oxidized under H-2-H2O atmosphere. Copyright (c) 2017 John Wiley & Sons, Ltd.