Thermal stability of zirconia/alumina thin coatings produced by magnetron sputtering

被引:33
作者
Andritschky, M
Cunha, I
Alpuim, P
机构
[1] Univ Minho, Inst Mat, P-4810 Guimaraes, Portugal
[2] Inst Politecn, Viana Do Castelo, Portugal
关键词
zirconia; phase transformation; grain growth; thin coating;
D O I
10.1016/S0257-8972(97)00492-1
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Thin ZrO2-Al2O3-Y2O3 coatings were deposited by reactive magnetron sputtering technique onto steel substrates. Annealing at 1273 K the ceramic ZrO2-Al2O3 mixtures in air crystallise In the tetragonal phase and grain growth is observed. The AlO3 content limits the maximum observed grain size between 25 and 30 nm during the observation time of this study of about 1.8 x 10(6) s (500 h). In contrast, the ZrO2-Y2O3 coatings revealed tetragonal grains with a size of about 200 nm. Diffusion processes cause the grain growth as well as the observed decrease of the intrinsic coating stress, Zirconia coatings stabilised by Al2O3 (without Y2O3) generally show tetragonal grains but prolonged annealing at 1273 K decreases the effect of the rigid Al2O3 matrix and the zirconia transforms into its monoclinic phase modification. Multilayered coatings of ZrO2 with layer thickness lower to 6 nm also retained the tetragonal phase. Nevertheless, 1-nm thick Al2O3 spacing layers are not sufficient to suppress the diffusion, growth and subsequent phase transformation of the zirconia. (C) 1997 Elsevier Science S.A.
引用
收藏
页码:144 / 148
页数:5
相关论文
共 10 条
[1]   Thermodynamics of tetragonal zirconia formation in a nanolaminate film [J].
Aita, CR ;
Wiggins, MD ;
Whig, R ;
Scanlan, CM ;
GajdardziskaJosifovska, M .
JOURNAL OF APPLIED PHYSICS, 1996, 79 (02) :1176-1178
[2]   GRAIN-GROWTH OF DIFFERENTLY DOPED ZIRCONIA [J].
ALLEMANN, JA ;
MICHEL, B ;
MARKI, HB ;
GAUCKLER, LJ ;
MOSER, EM .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1995, 15 (10) :951-958
[3]   CORROSION AND ADHERENCE OF STABILIZED ZRO2 COATINGS AT HIGH-TEMPERATURES [J].
ANDRITSCHKY, M ;
REBOUTA, L ;
TEIXEIRA, V .
SURFACE & COATINGS TECHNOLOGY, 1994, 68 :81-85
[4]  
Brook R.J., 1976, Treatise on Materials Science & Technology, V9, P331
[5]   STABILIZATION OF TETRAGONAL ZRO2 WITH AL2O3 IN REACTIVE MAGNETRON SPUTTERED THIN-FILMS [J].
GILMORE, CM ;
QUINN, C ;
QADRI, SB ;
GOSSETT, CR ;
SKELTON, EF .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1987, 5 (04) :2085-2087
[6]  
Keijser T.H.D., 1983, J APPL CRYSTALLOGR, V16, P309
[7]   STRUCTURAL STABILITY OF ZRO2-AL2O3 THIN-FILMS DEPOSITED BY MAGNETRON SPUTTERING [J].
QADRI, SB ;
GILMORE, CM ;
QUINN, C ;
SKELTON, EF ;
GOSSETT, CR .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1989, 7 (03) :1220-1224
[8]   MECHANICAL-PROPERTIES OF AL2O3 PARTICLE-Y-TZP MATRIX COMPOSITE AND ITS TOUGHENING MECHANISM [J].
SHI, JL ;
LI, BS ;
YEN, TS .
JOURNAL OF MATERIALS SCIENCE, 1993, 28 (15) :4019-4022
[9]   GRAIN-GROWTH OF ZNO IN ZNO-BI2O3 CERAMICS WITH TIO2, ADDITIONS [J].
SUZUKI, H ;
BRADT, RC .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (05) :1354-1360
[10]  
TEIXEIRA V, 1993, HIGH TEMP HIGH PRESS, V25, P213