Low Temperature Transformation of 3 mol% Yttria Stabilized Zirconia Coatings Deposited by Air Plasma Spraying

2009 ◽  
Vol 620-622 ◽  
pp. 413-416
Author(s):  
Bo Liang ◽  
Huang Chen ◽  
Chuan Xian Ding
Keyword(s):  
Raman Spectroscopy ◽  
Low Temperature ◽  
Water Temperature ◽  
Plasma Spraying ◽  
Deposition Efficiency ◽  
Yttria Stabilized Zirconia ◽  
Air Plasma ◽  
Air Plasma Spraying ◽  
Stabilized Zirconia ◽  
Temperature Transformation

The low temperature transformation of ZrO2-3 mol% Y2O3 coatings were investigated at 40 ~100oC using Raman spectroscopy. The results show that the low temperature transformation of ZrO2-3 mol% Y2O3 coatings is considerably effected by water temperature and mainly occurred on the coating surface. However, the transformation can be retarded by addition of Al2O3. The reasons lie in that the addition of Al2O3 can result in improvement of deposition efficiency and Young’s modulus of ZrO2-3 mol% Y2O3 coatings containing Al2O3.

Air Plasma Spraying of LSM/YSZ SOFC Composite Cathodes

2006 ◽  
Vol 15-17 ◽  
pp. 299-304 ◽  
Author(s):  
B.D. White ◽  
Olivera Kesler
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Plasma Spraying ◽  
Input Parameter ◽  
Deposition Efficiency ◽  
Powder Injection ◽  
Air Plasma ◽  
Air Plasma Spraying ◽  
Composition Control ◽  
Composite Cathodes ◽  
Parameter Values

Porous composite cathodes containing (La0.8Sr0.2)0.98MnO3 (LSM) and yttria stabilized zirconia (YSZ) for use in solid oxide fuel cells (SOFCs) have been produced by air plasma spraying. Deposition was carried out using axial powder injection for increased deposition efficiency and composition control. A number of composite cathodes were produced using different combinations of parameter values within the identified range. Successful coatings were then characterized for composition and porosity using EDX and SEM. As a result of these tests, combinations of input parameter values were identified that are best suited to the production of coatings with microstructures appropriate for use in SOFC composite cathodes.

scholarly journals Combined effect of thermal shock and hot corrosion on the failure of yttria stabilized zirconia thermal barrier coatings

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Changhai Zhou ◽  
X. W. Li ◽  
R.Y. Pan
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coatings ◽  
Hot Corrosion ◽  
Yttria Stabilized Zirconia ◽  
Combined Effect ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Air Plasma Spraying ◽  
Stabilized Zirconia ◽  
Barrier Coatings

The thermal barrier coatings (TBCs) of 8wt.% yttria stabilized zirconia (8YSZ) on a GH2132 alloy were deposited by air plasma spraying. The combined effect of thermal shock and hot corrosion on the failure of TBCs was highlighted investigated. The results showed that the combined effect of hot corrosion and thermal shock was prone to induce the failure of TBCs. The main failure of TBCs under the combined effect was in the form of penetrating crack to the bondcoat/substrate interface and oxidation at the penetrating crack front. 

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