文献类型：期刊文献

英文题名：Deposition and properties of a multilayered thermal barrier coating

作者：Yu, Z. X.[1,2];Huang, J. B.[1];Wang, W. Z.[1];Yu, J. Y.[1];Wu, L. M.[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Safety Sci Pressurized Syst, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Technol Belfort Montbeliard, F-90010 Belfort, France

年份：2016

卷号：288

起止页码：126

外文期刊名：SURFACE & COATINGS TECHNOLOGY

收录：;EI(收录号：20160801969269);WOS:【SCI-EXPANDED(收录号:WOS:000371549200015)】；

基金：The authors gratefully appreciate the support of National Natural Science Foundation of China (No. 51275172), Science and Technology Commission of Shanghai Municipality Project (No. 14DZ2261205), (Aviation Fund 2015ZES7001, 2013ZFS7001) and Shanghai Pujiang Program (15PJD009).

语种：英文

外文关键词：Thermal barrier coatings; Yttria stabilized zirconia (YSZ); Plasma sprayed; Multilayer

摘要：The widely used air plasma sprayed thermal barrier coatings (TBCs) in industrial gas turbine engines are limited by its durability. The failure of plasma sprayed TBCs in thermal cycling is usually induced by the spallation of ceramic coating within the ceramic coating near the top coat/bond coat interface. In this research, a multilayered ceramic coating architecture is introduced comprised of the layers of segmentation cracks, porous and dense. The segmented yttria stabilized zirconia (YSZ) layer was deposited at the substrate temperature of 750 degrees C without any artificial cooling, which resulted in the formation of YSZ layer with obvious columnar crystal structure and segmentation cracks. And a dense top YSZ layer was also included on the top to restrain the penetration of oxygen and the molten calcium-magnesium-alumina-silicate (CMAS) glass deposits. Additionally, the conventional porous YSZ coating was preserved in order to get the low thermal conductivity. The thermal cycling tests show that the lifetime of the multilayered TBCs increases by a factor of 2 compared with that of the conventional one, which could attribute to the high strain tolerance and fracture toughness of the segmented and columnar microstructure. Oxidation resistance and CMAS corrosion resistance are also better for the multilayered TBCs compared with that of the conventional one, due to the suppression function of dense top YSZ layer. It is potential to obtain the high performance TBCs by adjusting plasma spraying. (C) 2016 Elsevier B.V. All rights reserved.