Understanding the growth mechanisms of TiO2/Al2O3 mixed scales formed on Al-depleted Ti2AlC at 1000-1200?C

被引：4
作者：
Liu, Xuanzhen [1 ]
Chen, Ying [2 ,3 ]
Li, Ling [1 ]
Zhang, Han [1 ]
Huang, Aihui [1 ]
Fan, Xiaohui [1 ]
Zhao, Xiaofeng [1 ]
Lu, Jie [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv High Temp Mat & Precis Formin, Shanghai 200240, Peoples R China
[2] Univ Manchester, Dept Mat, Manchester M13 9PL, England
[3] Univ Manchester, Henry Royce Inst, Manchester M13 9PL, England
来源：
CORROSION SCIENCE | 2022年 / 204卷
基金：
中国国家自然科学基金;
关键词：
Ti2AlC; Oxidation; Microstructure evolution; Mixed oxide scales; HIGH-TEMPERATURE OXIDATION; MAX PHASE; M(N+1)AX(N) PHASES; TIN+1ALXN N=1-3; TI-AL; TI3ALC2; BEHAVIOR; DIFFUSIVITY; EVOLUTION; OXYGEN;
D O I：
10.1016/j.corsci.2022.110393
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present a detailed study of thermally grown oxide scales on a bulk Ti2AlC material and explore its oxide growth mechanisms at 1000 degrees C, 1100 degrees C and 1200 degrees C, respectively. The oxide scale predominantly consists of an outer TiO2-rich layer and an inner TiO2/Al2O3 mixed layer. The formation of such a duplex microstructure is caused by the phase transformation from Ti2AlC to TiC at the scale/substrate interface and the Al depletion due to the formation of impurities. The insufficient supply of Al to scale/substrate interface, together with the competition from growth of TiO2, prevents formation of a continuous Al2O3 scale.
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页数：10
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