Microstructure and performance properties of 1200 °C-servicing gradiently aluminized NiCrAlYSi coating for single-crystal nickel-based superalloy

被引：13

作者：

Kang, Jie ^{[1
]}

Liu, Yuan ^{[1
]}

Geng, Lilun ^{[2
]}

Zhang, Heng ^{[3
]}

Ru, Yi ^{[3
]}

Zhao, Wenyue ^{[3
]}

Pei, Yanling ^{[3
]}

Li, Shusuo ^{[1
]}

Gong, Shengkai ^{[3
]}

机构：

[1] Beihang Univ, Res Inst Aeroengine, Xueyuan Rd, Beijing 100191, Peoples R China

[2] Beihang Univ, Sch Mat Sci & Engn, Xueyuan Rd, Beijing 100191, Peoples R China

[3] Beihang Univ, Frontier Res Inst Innovat Sci & Technol, Xueyuan Rd, Beijing 100191, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 924卷

关键词：

Coating materials; Superalloy; SEM; Al content; Cyclic oxidation; THERMAL-BARRIER COATINGS; CHEMICAL-VAPOR-DEPOSITION; CYCLIC-OXIDATION; HIGH-TEMPERATURE; CORROSION BEHAVIOR; HIGH-MO; AL; DIFFUSION; EVOLUTION; MECHANISMS;

D O I：

10.1016/j.jallcom.2022.166619

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Enhancing service temperature of commercial MCrAlY series coatings to above 1100 degrees C becomes a new challenge. The aluminization seems be a possible solution. In this work, different Al contents aluminized NiCrAlYSi coatings were prepared. The microstructure, elemental distribution and cyclic oxidation performance of aluminized NiCrAlYSi coating with different Al contents have been investigated, using a substrate of Mo-rich single-crystal nickel-based superalloy. The Al content dependence of coating-air oxidation resistance and coating-substrate diffusion behavior is obtained at 1200 degrees C. These results demonstrate that this gradient aluminization is a cost-effective way to resolve service temperature enhancement. This also establishes a trade-off that adding Al content increases formation of dense Al2O3 scales with the sacrifice of surface smoothness. (C) 2022 Elsevier B.V. All rights reserved.

引用

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