An investigation into the correlation between nano-impact resistance and erosion performance of EB-PVD thermal barrier coatings on thermal ageing

被引：23

作者：

Chen, Jian ^{[1
,2
]}

Beake, Ben D. ^{[3
]}

Wellman, Richard G. ^{[4
]}

Nicholls, John R. ^{[4
]}

Dong, Hanshan ^{[2
]}

机构：

[1] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Adv Metall Mat, Nanjing 211189, Jiangsu, Peoples R China

[2] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[3] Micro Mat, Wrexham LL13 7YL, Wales

[4] Cranfield Univ, Sch Appl Sci, Bedford MK43 0AL, Beds, England

来源：

SURFACE & COATINGS TECHNOLOGY | 2012年 / 206卷 / 23期

基金：

英国工程与自然科学研究理事会;

关键词：

Erosion; Thermal barrier coatings; Nano-impact; Nanoindentation; TBC MORPHOLOGY; BULK MATERIALS; INDENTATION; ZIRCONIA;

D O I：

10.1016/j.surfcoat.2012.06.011

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanomechanical testing (nano-impact and nanoindentation mapping) has been carried out on the top surfaces of as-received and aged 8 wt.% yttria stabilised zirconia (YSZ) thermal barrier coatings (TBCs) produced by electron-beam physical vapour deposition (EB-PVD). The correlation between the nanomechanical test results and the previously reported erosion resistance of the TBCs has been investigated. The experimental results revealed that aged TBCs on zirconia for 24 h at 1500 degrees C or on alumina for 100 h at 1100 degrees C resulted in large increases in their hardness (H), modulus (E), H/E and H-3/E-2 ratios but their erosion resistance was reduced. Nano-impact tests showed a dramatic decrease in impact resistance following the ageing of these TBCs, which is consistent with the erosion results. The strong correlation between the nano-impact and erosion resistances has confirmed the premise that rapid laboratory impact tests must produce deformation with similar contact footprint to that produced in the erosion tests. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：4992 / 4998

页数：7

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