Outstanding durability of sol-gel thermal barrier coatings reinforced by YSZ-fibers

被引：10

作者：

Delon, E. ^{[1
]}

Ansart, F. ^{[1
]}

Duluard, S. ^{[1
]}

Bonino, J. P. ^{[1
]}

Monceau, D. ^{[2
]}

Rouaix, A. ^{[2
]}

Mainguy, R. ^{[2
]}

Thouron, C. ^{[2
]}

Malie, A. ^{[3
]}

Joulia, A. ^{[4
]}

Bianchi, L. ^{[3
]}

Gomez, P. ^{[5
]}

机构：

[1] Univ Toulouse 3 Paul Sabatier, Univ Toulouse, CIRIMAT, CNRS,INPT,UPS, Bat CIRIMAT,118 Route Narbonne, F-31062 Toulouse 9, France

[2] Univ Toulouse, CIRIMAT, INP ENSIACET, CNRS,INPT,UPS,CIRIMAT ENSIACET, 4 Alle Emile Monso,BP 44362, F-31030 Toulouse 4, France

[3] SAFRAN AIRCRAFT ENGINES Site Chatellerault, Rue Maryse Bastie,BP 129, F-86101 Chatellerault, France

[4] SAFRA Tech, Pole Mat & Proc, Rue Jeunes Bois,CS 80112, F-78772 Magny Les Hameaux, France

[5] DGA Tech Aeronaut, 47 Rue St Jean 93123, F-31131 Balma, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2018年 / 38卷 / 14期

关键词：

Thermal barrier coatings; Sol-gel; Fibers; Cyclic oxidation; YTTRIA-STABILIZED ZIRCONIA; CYCLIC OXIDATION LIFE; PORE-FORMING AGENT; SINTERING TEMPERATURE; RAMAN-SPECTROSCOPY; BRITTLE COATINGS; GAS-TURBINES; CERAMICS; MECHANISMS; CONDUCTIVITY;

D O I：

10.1016/j.jeurceramsoc.2018.06.025

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：

Thermal barrier coatings (TBC) were fabricated with commercial powders of yttria stabilized zirconia with spherical and fiber-like morphologies. The influence of fiber percentage and sintering temperature on the thermomechanical behavior was studied. TBCs with 60%-80% fibers content had the best lifetime in cyclic oxidation with less than 10% of coating spallation after 1000 cycles, with very good reproducibility. They reached lifetimes higher than industrial TBCs made by EB-PVD. The enhancement of durability is believed to be due to an increase in the thermomechanical constraints accommodation thanks to higher porosity and higher tenacity due to the presence of well anchored fibers, indeed deviation of the cracks were observed. Moreover, the morphology of the thermally grown oxide (TGO) layer is also favorable as it includes anchorage points of the TGO with fibers. This increased the adherence at the substrate interface and improved lifetime.

引用

页码：4719 / 4731

页数：13

共 42 条

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