TEM study of the early stages of Ti2AlC oxidation at 900 °C

被引：30
作者：
Cui, Bai [1 ]
Jayaseelan, Daniel Doni
Lee, William Edward
机构：
[1] Univ London Imperial Coll Sci Technol & Med, CASC, London SW7 2AZ, England
来源：
SCRIPTA MATERIALIA | 2012年 / 67卷 / 10期
基金：
英国工程与自然科学研究理事会;
关键词：
MAX phases; Oxidation; Microstructure; Ti2AlC; HIGH-TEMPERATURE OXIDATION; MICROSTRUCTURAL EVOLUTION; TIN+1ALXN N=1-3; STABILITY; CORROSION; BEHAVIOR; TI3ALC2;
D O I：
10.1016/j.scriptamat.2012.07.045
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The cross-sectional microstructure on Ti2AlC oxidized for 1 h at 900 degrees C was investigated using focused ion beam/transmission electron microscopy. An Al-depleted intermediate layer formed between the oxide scale and the substrate that consisted of nonstoichiometric Ti2AlxC nanocrystallites. The oxide scale consisted of a TiO2-rich outer layer and an Al2O3-rich inner layer. Ti2AlC has been theoretically predicted to preserve its crystal structure down to a sub-stoichiometry of Ti2Al0.5C, and such a Ti2AlxC phase was observed in this study. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：830 / 833
页数：4
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