Effect of phase transformations on the fracture toughness of t′ yttria stabilized zirconia

被引：96
作者：
Loganathan, Archana [1 ]
Gandhi, Ashutosh S. [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 556卷
关键词：
Thermal barrier coatings (TBC); Yttria stabilized zirconia; Phase transformations; Toughness; Ferroelasticity; THERMAL BARRIER COATINGS; MARTENSITIC-TRANSFORMATION; BOND COAT; MECHANISMS; STRESS; YSZ; CONDUCTIVITY; DELAMINATION; EVOLUTION; OXIDATION;
D O I：
10.1016/j.msea.2012.07.095
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Monolithic ZrO2-8 mol% YO1.5 (YSZ) with t' tetragonal phase was found to have high indentation fracture toughness of similar to 91 J m(-2). The effect of transformation of t' phase by cubic zirconia (c) precipitation on fracture toughness was studied. Fracture toughness decreased rapidly at the onset of precipitation, by a factor of similar to 3 at 1150 degrees C after 12 h and similar to 2.6 at 1250 degrees C after 24 h. Ferroelasticity is the toughening mechanism at 1150 degrees C and up to 96 h at 1250 degrees C. Ferroelastic toughening was analyzed in terms of tetragonality of the major phase as well as microstructural changes such as coarsening, increasing cubic phase fraction and residual stresses. Transformation toughening was observed after 192 h at 1250 degrees C, with an increase in toughness by a factor of similar to 2.5. The results show that the toughness of initially t' YSZ thermal barrier coatings would evolve during service due to phase transformations. The toughening mechanism may change from ferroelasticity to transformation toughening with TBC aging. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：927 / 935
页数：9
相关论文
共 59 条
[1]   Kinetics of phase change I - General theory [J].
Avrami, M .
JOURNAL OF CHEMICAL PHYSICS, 1939, 7 (12) :1103-1112
[2]   Influence of aging on structure and thermal conductivity of Y-PSZ and Y-FSZ EB-PVD coatings [J].
Azzopardi, A ;
Mévrel, R ;
Saint-Ramond, B ;
Olson, E ;
Stiller, K .
SURFACE & COATINGS TECHNOLOGY, 2004, 177 :131-139
[3]   Ferroelastic and plastic deformation of t′-zirconia single crystals [J].
Baither, D ;
Bartsch, M ;
Baufeld, B ;
Tikhonovsky, A ;
Foitzik, A ;
Rühle, M ;
Messerschmidt, U .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2001, 84 (08) :1755-1762
[4]   Anisotropic TGO rumpling in EB-PVD thermal barrier coatings under in-phase thermomechanical loading [J].
Balint, D. S. ;
Kim, S. -S. ;
Liu, Yu-Fu ;
Kitazawa, R. ;
Kagawa, Y. ;
Evans, A. G. .
ACTA MATERIALIA, 2011, 59 (06) :2544-2555
[5]   Phase stability of thermal barrier oxides:: A comparative study of Y and Yb additions [J].
Cairney, Julie M. ;
Rebollo, Noemi R. ;
Ruehle, Manfred ;
Levi, Carlos G. .
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2007, 98 (12) :1177-1187
[6]   FERROELASTIC DOMAIN SWITCHING IN TETRAGONAL ZIRCONIA SINGLE-CRYSTALS MICROSTRUCTURAL ASPECTS [J].
CHAN, CJ ;
LANGE, FF ;
RUHLE, M ;
JUE, JF ;
VIRKAR, AV .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (04) :807-813
[7]   Characterization and modeling of a martensitic transformation in a platinum modified diffusion aluminide bond coat for thermal barrier coatings [J].
Chen, MW ;
Glynn, ML ;
Ott, RT ;
Hufnagel, TC ;
Hemker, KJ .
ACTA MATERIALIA, 2003, 51 (14) :4279-4294
[8]   Mechanisms governing the high temperature erosion of thermal barrier coatings [J].
Chen, X ;
He, MY ;
Spitsberg, I ;
Fleck, NA ;
Hutchinson, JW ;
Evans, AG .
WEAR, 2004, 256 (7-8) :735-746
[9]  
Christian J.W., 2002, THEORY TRANSFORMATIO
[10]   Materials design for the next generation thermal barrier coatings [J].
Clarke, DR ;
Levi, CG .
ANNUAL REVIEW OF MATERIALS RESEARCH, 2003, 33 :383-417
123456