Oxidation behavior of nano-structured (Al2O3 + Y2O3)/AlY coating on γ-TiAl upon exposure to 1200 °C

被引：7

作者：

Xu, Yi ^{[1
,2
]}

Shi, Pengfei ^{[1
]}

Cui, Shiyu ^{[3
]}

Li, Yanhui ^{[2
]}

Xu, Aoni ^{[2
]}

Wang, Jiaming ^{[2
]}

Yao, Zhengjun ^{[3
]}

Zhou, Xuefeng ^{[1
]}

Yuan, Ting ^{[1
]}

Liu, Wanhui ^{[1
]}

Chen, Jiayuan ^{[1
]}

机构：

[1] Changshu Inst Technol, Dept Chem & Mat Engn, Changshu 215500, Jiangsu, Peoples R China

[2] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[3] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211106, Jiangsu, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2019年 / 45卷 / 04期

关键词：

Nano-structure; Grain growth; Oxidation resistance; Thermal application; GAMMA-TIAL ALLOY; COATINGS; MICROSTRUCTURE; PERFORMANCE; RESISTANCE; SI;

D O I：

10.1016/j.ceramint.2018.11.142

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Developing gamma-TiAl intermetallic alloys as candidate materials for manufacturing components of aircraft gas turbines has been limited because of their poor oxidation resistance at high temperature. In this study, a nano-structured (Al2O3 + Y2O3)/AlY coating was deposited on a gamma-TiAl alloy by sputtering, to improve its oxidation resistance. To evaluate this coating under real-life critical operating conditions in aircraft engines, the isothermal oxidation exposure at an elevated temperature of 1200 degrees C was carried out. The analysis results indicated that Al and Y diffused through the grain boundary to synthesize or grow oxides outward, toward the testing atmosphere during the oxidation tests. During this process, oxygen was somewhat prevented from penetrating the coating because of the strong oxytropism of the coating surface to form Al and Y oxides. The coating exhibited a nanosized Al and Y oxides surface morphology after 100 h of oxidation. Weight change kinetics revealed that the weight gain of the coating was 7.49 mg/cm(2), while that of the substrate fluctuated because of oxide scale spallation. The nano-structured (Al2O3 + Y2O3)/AlY coating improved the oxidation resistance of the gamma-TiAl alloy at elevated temperature.

引用

页码：5163 / 5167

页数：5

共 17 条

[1]

[Anonymous], 1855, Ann. Phys. Chem, DOI [DOI 10.1002/ANDP.18551700105, 10.1002/andp.18551700105]

[2] Al-Si and Al-Si-Y coatings deposited by HS-PVD for the oxidation protection of γ-TiAl [J].

Bobzin, K. ;

Broegelmann, T. ;

Kalscheuer, C. ;

Liang, T. .

SURFACE & COATINGS TECHNOLOGY, 2018, 350 :587-595

[3] Preparation and characterization of Cr/CrC multilayer on γ-TiAl alloy by the double glow plasma surface alloying technology [J].

Chen Xiaohu ;

Zhang Pingze ;

Wei Dongbo ;

Ding Feng ;

Li Fengkun ;

Wei Xiangfei ;

Ma Shijian .

MATERIALS LETTERS, 2018, 215 :292-295

[4] Mechanical performance and oxidation resistance of an ODS γ-TiAl alloy processed by spark plasma sintering and laser additive manufacturing [J].

Kenel, C. ;

Lis, A. ;

Dawson, K. ;

Stiefel, M. ;

Pecnik, C. ;

Barras, J. ;

Colella, A. ;

Hauser, C. ;

Tatlock, G. J. ;

Leinenbach, C. ;

Wegener, K. .

INTERMETALLICS, 2017, 91 :169-180

[5] Ion-plated Al-Al2O3 films as diffusion barriers between NiCrAlY coating and orthorhombic-Ti2AlNb alloy [J].

Li, H. Q. ;

Wang, Q. M. ;

Jiang, S. M. ;

Gong, J. ;

Sun, C. .

CORROSION SCIENCE, 2010, 52 (05) :1668-1674

[6] Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings [J].

Liu, ZY ;

Gao, W ;

Dahm, KL ;

Wang, FH .

ACTA MATERIALIA, 1998, 46 (05) :1691-1700

[7] Preparation and high-temperature properties of Au nano-particles doped α-Al2O3 composite coating on TiAl-based alloy [J].

Ma, Xiaoxu ;

He, Yedong ;

Wang, Deren .

APPLIED SURFACE SCIENCE, 2011, 257 (23) :10273-10281

[8] Materials science - Thermal barrier coatings for gas-turbine engine applications [J].

Padture, NP ;

Gell, M ;

Jordan, EH .

SCIENCE, 2002, 296 (5566) :280-284

[9] High temperature behavior of functional TiAlBSiN nanocomposite coatings [J].

Pshyk, A. V. ;

Coy, L. E. ;

Nowaczyk, G. ;

Kempinski, M. ;

Peplinska, B. ;

Pogrebnjak, A. D. ;

Beresnev, V. M. ;

Jurga, S. .

SURFACE & COATINGS TECHNOLOGY, 2016, 305 :49-61

[10]

Shen M., 2016, NAT COMMUN, P1

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