Thermal cycling behavior of nanostructured and conventional yttria-stabilized zirconia thermal barrier coatings via air plasma spray  

作　　者：Cheng-Yang Jiang Min Feng Chun-Tang Yu Ze-Bin Bao Sheng-Long Zhu Fu-Hui Wang 

机构地区：[1]Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang,110819,China [2]Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China

出　　处：《Rare Metals》2023年第11期3859-3869,共11页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51671202 and51301184);the Defense Industrial Technology Development Program (No.JCKY2016404C001);the“Liaoning Baiqianwan Talents Program.”。

摘　　要：Two thermal barrier coating(TBC)systems comprising NiCoCrAlY bond coat onto a second-generation Ni-based single crystal superalloy and nano structured4 mol%Y_(2)O_(3)-stabilized ZrO_(2)(4YSZ)and conventional yttria-stabilized zirconia(YSZ)top coats upwardly were deposited by approaches of arc ion plating(AIP)and air plasma spray(APS).As indicted by the experimental results,the 4YSZ TBCs exhibited superior thermal cycling resistance compared with conventional YSZ TBCs at 1100℃.The 4YSZ top coat exhibited higher toughness due to its intrinsic property of nanocrystalline structure,homogeneously distributed and diverse directions of pores and preexisted cracks.The cracks and spallation in 4YSZ TBCs occurred at the interface of top coat and thermally grown oxide(TGO)layer.Instead,the crack initiation and propagation started along the lamellar interface in the top coat of conventional YSZ TBCs,leading to the rapid crack bridging and subsequent spalling of top coat.Additionally,before and after oxidation,the 4YSZ top coat showed higher hardness compared to conventional YSZ top coat.Degradation mechanism and distribution of residual stress in TGO for the 4YSZ TBCs were investigated in the current study.

关 键 词：TBC NANOCRYSTALLINE TGO Thermal cycling TOUGHNESS 

分 类 号：TG174.4[金属学及工艺—金属表面处理]