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.

引用

页数：10

共 38 条

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