Abstract
An 8 (wt.) % yttria partially stabilized zirconia (YSZ) coating isothermally oxidized in air at 1100 °C for up to 3000 h was investigated by means of indentation and electron microscopy analyses. It is found that the growth kinetics of thermally grown oxides followed a parabolic law. The apparent porosity within the coatings decreased after isothermal oxidation. The tetragonal prime YSZ phase transformed into cubic and then monoclinic phases during isothermal oxidation. Elastic modulus, microhardness and fracture toughness of the coating increased as oxidation duration prolonged. The correlation between microstructural variation and mechanical properties was discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 8815-8823 |
| Number of pages | 9 |
| Journal | Ceramics International |
| Volume | 45 |
| Issue number | 7 |
| DOIs | |
| State | Published - May 1 2019 |
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Keywords
- Isothermal oxidation
- Mechanical properties
- Microstructural evolution
- Thermal barrier coatings (TBCs)
- Transmission electron microscopy (TEM)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry
Cite this
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Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings. / Liu, Y. Z.; Hu, Xiaobing; Zhu, Y. L.; Wei, H.; Dravid, Vinayak P; Zhang, W. W.
In: Ceramics International, Vol. 45, No. 7, 01.05.2019, p. 8815-8823.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effects of isothermal oxidation on microstructure and mechanical properties of thermal barrier coatings
AU - Liu, Y. Z.
AU - Hu, Xiaobing
AU - Zhu, Y. L.
AU - Wei, H.
AU - Dravid, Vinayak P
AU - Zhang, W. W.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - An 8 (wt.) % yttria partially stabilized zirconia (YSZ) coating isothermally oxidized in air at 1100 °C for up to 3000 h was investigated by means of indentation and electron microscopy analyses. It is found that the growth kinetics of thermally grown oxides followed a parabolic law. The apparent porosity within the coatings decreased after isothermal oxidation. The tetragonal prime YSZ phase transformed into cubic and then monoclinic phases during isothermal oxidation. Elastic modulus, microhardness and fracture toughness of the coating increased as oxidation duration prolonged. The correlation between microstructural variation and mechanical properties was discussed.
AB - An 8 (wt.) % yttria partially stabilized zirconia (YSZ) coating isothermally oxidized in air at 1100 °C for up to 3000 h was investigated by means of indentation and electron microscopy analyses. It is found that the growth kinetics of thermally grown oxides followed a parabolic law. The apparent porosity within the coatings decreased after isothermal oxidation. The tetragonal prime YSZ phase transformed into cubic and then monoclinic phases during isothermal oxidation. Elastic modulus, microhardness and fracture toughness of the coating increased as oxidation duration prolonged. The correlation between microstructural variation and mechanical properties was discussed.
KW - Isothermal oxidation
KW - Mechanical properties
KW - Microstructural evolution
KW - Thermal barrier coatings (TBCs)
KW - Transmission electron microscopy (TEM)
UR - http://www.scopus.com/inward/record.url?scp=85060759914&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060759914&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2019.01.208
DO - 10.1016/j.ceramint.2019.01.208
M3 - Article
AN - SCOPUS:85060759914
VL - 45
SP - 8815
EP - 8823
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 7
ER -