Improving the hot corrosion resistance of plasma sprayed ceria-yttria stabilized zirconia thermal barrier coatings by laser surface treatment

被引：77

作者：

Ahmadi-Pidani, Raheleh ^{[1
]}

Shoja-Razavi, Reza ^{[1
]}

Mozafarinia, Reza ^{[1
]}

Jamali, Hossein ^{[1
]}

机构：

[1] Malek Ashtar Univ Technol, Dept Mat Engn, Shahinshahr, Isfahan, Iran

来源：

MATERIALS & DESIGN | 2014年 / 57卷

关键词：

Laser glazing; Thermal barrier coating; Ceria-yttria stabilized zirconia; Air plasma spraying; Hot corrosion; CYCLIC OXIDATION BEHAVIOR; MICROSCOPIC OBSERVATION; YSZ; TEMPERATURE; EVOLUTION; MICROSTRUCTURE;

D O I：

10.1016/j.matdes.2013.12.075

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ceria-yttria stabilized zirconia (CYSZ) thermal barrier coatings (TBCs) were deposited by air plasma spraying on NiCoCrAlY-coated Inconel 738LC substrates. After that, the surface of plasma sprayed CYSZ TBCs were glazed using a pulsed Nd:YAG laser. The effects of laser glazing on hot corrosion resistance of the coatings were evaluated in presence of 45 wt%Na2SO4 + 55 wt% V2O5 corrosive molten salt at 1000 degrees C. The results revealed that the hot corrosion resistance of plasma sprayed CYSZ TBCs were enhanced more than twofold by laser surface glazing due to reducing specific reactive area of the dense glazed surface layer and consequently, decreasing the reaction between molten salt and zirconia stabilizers. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：336 / 341

页数：6

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