典型文献
Premature failure induced by non-equilibrium grain-boundary tantalum segregation in air-plasma sprayed ZrO2–YO1.5–TaO2.5thermal barrier coatings
文献摘要：
ZrO2–YO1.5–TaO2.5 (ZYTO) is a promising top-coat material for thermal barrier coatings (TBCs). The bulk properties of ZYTO have been reported by several studies, but its performances as TBCs are less-well understood. In this work, ZYTO TBCs were prepared by air plasma spraying (APS) and their thermal cycling performances were investigated at 1150°C. Despite of the good bulk properties, APS ZYTO TBCs present an extremely short thermal fatigue life. This is attributed to the non-equilibrium grain-boundary segregation of TaO2.5 induced by limited solubility and rapid quenching during APS process, resulting in a tetragonal (t) to cubic (c) and metastable-tetragonal (tm) phase trans-formation in ZYTO TBCs. The volume shrinkage (～0.74vol％) of phase transformation leads to many cracks at the c/tm phase boundaries after deposition. On the other hand, the formation of cubic phase with massive grain-boundary Ta segregation induces a large intergranular embrit-tlement and a weak bonding strength (～5.3 MPa), resulting in the premature failure of the ZYTO TBCs.
文献关键词：
中图分类号：
作者姓名：
Yao Yao;Di Wu;Xiaofeng Zhao;Fan Yang
作者机构：
Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming,Shanghai Jiao Tong University,Shanghai 200240,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
文献出处：
引用格式：
[1]Yao Yao;Di Wu;Xiaofeng Zhao;Fan Yang-.Premature failure induced by non-equilibrium grain-boundary tantalum segregation in air-plasma sprayed ZrO2–YO1.5–TaO2.5thermal barrier coatings)[J].矿物冶金与材料学报,2022(12):2189-2200
A类：
YO1,TaO2,5thermal,ZYTO,74vol,embrit,tlement
B类：
Premature,failure,induced,by,equilibrium,grain,boundary,tantalum,segregation,air,plasma,sprayed,ZrO2,barrier,coatings,promising,top,material,TBCs,bulk,properties,have,been,reported,several,studies,its,performances,less,well,understood,In,this,work,were,prepared,spraying,APS,their,cycling,investigated,Despite,good,present,extremely,short,fatigue,life,This,attributed,limited,solubility,rapid,quenching,during,process,resulting,tetragonal,cubic,metastable,tm,phase,volume,shrinkage,transformation,leads,many,cracks,boundaries,after,deposition,On,other,hand,massive,induces,large,intergranular,weak,bonding,strength,premature
AB值：
0.459109
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