Oxide-scale growth on Cr2AlC ceramic and its consequence for self-healing

被引：63
|
作者：
Yang, H. J.
Pei, Y. T. [1 ]
De Hosson, J. Th. M.
机构：
[1] Univ Groningen, Dept Appl Phys, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands
来源：
SCRIPTA MATERIALIA | 2013年 / 69卷 / 02期
关键词：
Cr2AlC ceramics; Oxidation; Diffusion; Alumina scale; Self-healing; FE-CR-AL; OXIDATION; TI2ALC; PERFORMANCE; MORPHOLOGY; DIFFUSION;
D O I：
10.1016/j.scriptamat.2013.04.013
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Outward growth of oxide scale on Cr2AlC surface during multiple annealing at 1100 degrees C was investigated with ex situ microscopy. A dense alumina scale was formed on the surface of Cr2AlC samples after annealing for 40 h. A wedge-shaped specimen with varying thickness of oxide scale was prepared by focused ion beam slicing for further annealing. It is concluded that the outward diffusion of Al ions via grain boundaries dominates the growth of oxide scale during repeated annealing. This result is relevant to the self-healing kinetics of exposed cracks in MAX phase ceramics via cyclic heating. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：203 / 206
页数：4
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