High-temperature compressive creep behavior and mechanism of Hf6Ta2O17 ceramic as a candidate for thermal barrier coatings

被引：3

作者：

Zheng, Y. X. ^{[1
,2
]}

Hu, X. P. ^{[1
,2
]}

Liu, S. ^{[1
,2
]}

Liu, Q. ^{[1
,2
]}

Zou, Y. ^{[1
,2
]}

Guo, J. W. ^{[1
,2
]}

Zhu, W. ^{[1
,2
]}

机构：

[1] Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Key Film Mat & Applicat Equipment Hunan Pr, Xiangtan 411105, Hunan, Peoples R China

[2] Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Low Dimens Mat & Applicat Technol, Minist Educ, Xiangtan 411105, Hunan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 18期

关键词：

High-temperature creep; Creep mechanism; Grain boundary sliding; Dislocation movement; YTTRIA-STABILIZED ZIRCONIA; PLASTIC-DEFORMATION; CONDUCTIVITY; FLOW;

D O I：

10.1016/j.ceramint.2023.06.248

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel Hf6Ta2O17 ceramics is prepared by a solid-state reaction method. High-temperature creep behavior of Hf6Ta2O17 and 8YSZ ceramics are investigated by compressive creep test combined with a digital image correlation (DIC) method. It is found that the creep mechanism of Hf6Ta2O17 ceramics is controlled by grain boundary sliding associated with dislocation movement (stress exponent-2-3, and activation energy of 600-620 kJ/mol). Grain boundary sliding accommodated to the interface reaction is the main creep mechanism of 8YSZ ceramics (stress exponent-2, and activation energy of 425-465 kJ/mol). Hf6Ta2O17 ceramics have higher creep resistance than 8YSZ ceramics under the same conditions.

引用

页码：29905 / 29912

页数：8

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