Investigation on the phase stability, sintering and thermal conductivity of Sc2O3-Y2O3-ZrO2 for thermal barrier coating application

被引：81

作者：

Liu, Huaifei ^{[1
,2
]}

Li, Songlin ^{[1
]}

Li, Qilian ^{[2
]}

Li, Yongming ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Beijing Aeronaut Mfg Technol Res Inst, Natl Key Lab High Energy Dens Beam Proc Technol, Beijing 100024, Peoples R China

来源：

MATERIALS & DESIGN | 2010年 / 31卷 / 06期

关键词：

Thermal barrier coatings; Scandia; Yttria-stabilized zirconia; Phase stability; Sintering resistance; Thermal conductivity; HIGH-TEMPERATURE STABILITY; ZRO2-Y2O3-LA2O3; COATINGS; EB-PVD; ZIRCONIA; YSZ; SCANDIA; RESISTANCE; BEHAVIOR; SYSTEM; LA2O3;

D O I：

10.1016/j.matdes.2009.12.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rare earth oxides co-doped zirconia have been developed for application in thermal barrier coating systems to promote the performance and durability of gas turbines. 8 mol%Sc2O3, 0.6 mol%Y2O3-stabilized ZrO2 (ScYSZ) powder was synthesized by chemical co-precipitation method. The phase stability, sintering resistance and thermo-physical properties of ScYSZ and 8 wt%Y2O3 stabilized ZrO2 (8YSZ) were investigated. The results indicated that both ScYSZ and 8YSZ show single tetragonal phase before heat treatment. After heat treating at 1500 degrees C for 300 h, ScYSZ exhibits excellent phase stability with 100% metastable tetragonal (t') phase, whereas the content of monoclinic phase in 8YSZ reached 49.4 mol%. ScYSZ also exhibits higher sintering resistance and lower thermal conductivity than 8YSZ. ScYSZ can be considered to be explored as candidate material for TBC application. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2972 / 2977

页数：6

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