Yb 2 O 3 ‐Gd 2 O 3 codoped strontium zirconate composite ceramics for potential thermal barrier coating applications

2020 ◽  
Vol 17 (4) ◽  
pp. 1608-1618
Author(s):  
Jingxin Zhang ◽  
Yu Bai ◽  
Enbo Li ◽  
Hongying Dong ◽  
Wen Ma
Keyword(s):  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Composite Ceramics ◽  
Strontium Zirconate ◽  
Barrier Coating

Sc2O3 and Gd2O3 Co-Doped Strontium Zirconate as a New Thermal Barrier Coating Material

2011 ◽  
Vol 239-242 ◽  
pp. 1457-1462 ◽  
Author(s):  
Wen Ma ◽  
Feng Yu Song ◽  
Wen Shan Lun ◽  
Dong Xing Wang ◽  
Hong Ying Dong ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Barrier Coating ◽  
Positive Influence ◽  
Thermal Barrier ◽  
Second Phase ◽  
Strontium Zirconate ◽  
Co Doping ◽  
Thermal Expansion Coefficients ◽  
Barrier Coating ◽  
Co Doped

An advanced ceramic material of perovskite structure, Sc2O3(5 mol%)and Gd2O3(5 mol%) co-doped SrZrO3, was investigated as a material for thermal barrier coating (TBC) applications. Sr(Zr0.9Sc0.05Gd0.05)O2.95(SZSG) was synthesized using ball milling prior to solid-state sintering, and had a minor second phase of Gd2O3. The material showed good phase stability not only from room temperature to 1400°C, but also at high temperature of 1450°C for a long period, analyzed by DSC and XRD, respectively. The thermal expansion coefficients (TECs) of the sintered bulk SZSG were recorded by a high-temperature dilatometer and revealed a positive influence on phase transitions of SrZrO3by co-doping Sc2O3and Gd2O3. The thermal conductivity of SZSG had much lower values in contrast to that of SrZrO3and Sr(Zr0.8Gd0.2)O2.9in whole tested temperature range. The good chemical compatibility was observed for SZSG with 8YSZ or Al2O3powders. All the results revealed that SZSG might be a potential material for TBC applications at higher temperatures compared with 8YSZ.

Double Rare-Earth Oxides Co-doped Strontium Zirconate as a New Thermal Barrier Coating Material

2012 ◽  
Vol 22 (2-3) ◽  
pp. 104-109 ◽  
Author(s):  
Wen Ma ◽  
Dongxing Wang ◽  
Hongying Dong ◽  
Wenshan Lun ◽  
Weiyan He ◽  
...  
Keyword(s):  
Rare Earth ◽  
Thermal Barrier Coating ◽  
Rare Earth Oxides ◽  
Coating Material ◽  
Thermal Barrier ◽  
Strontium Zirconate ◽  
Barrier Coating ◽  
Co Doped

HOT CORROSION OF CERIA-YTTRIA STABILIZED ZIRCONIA PLASMA SPRAYED THERMAL BARRIER COATING BY EUTECTIC VANDIUM PENTAOXIDE-SODIUM SULFATE

2018 ◽  
Vol 18 (1) ◽  
pp. 182-192 ◽  
Author(s):  
Mohammed J Kadhim ◽  
Mohammed H Hafiz ◽  
Maryam A Ali Bash
Keyword(s):  
Thermal Barrier Coating ◽  
Hot Corrosion ◽  
Monoclinic Phase ◽  
Volume Fraction ◽  
High Volume ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Plan View ◽  
Barrier Coating ◽  
Plasma Sprayed

The high temperature corrosion behavior of thermal barrier coating (TBC) systemconsisting of IN-738 LC superalloy substrate, air plasma sprayed Ni24.5Cr6Al0.4Y (wt%)bond coat and air plasma sprayed ZrO2-20 wt% ceria-3.6 wt% yttria (CYSZ) ceramic coatwere characterized. The upper surfaces of CYSZ covered with 30 mg/cm2 , mixed 45 wt%Na2SO4-55 wt% V2O5 salt were exposed at different temperatures from 800 to 1000 oC andinteraction times from 1 up to 8 h. The upper surface plan view of the coatings wereidentified for topography, roughness, chemical composition, phases and reaction productsusing scanning electron microscopy, energy dispersive spectroscopy, talysurf, and X-raydiffraction. XRD analyses of the plasma sprayed coatings after hot corrosion confirmed thephase transformation of nontransformable tetragonal (t') into monoclinic phase, presence ofYVO4 and CeVO4 products. Analysis of the hot corrosion CYSZ coating confirmed theformation of high volume fraction of YVO4, with low volume fractions of CeOV4 and CeO2.The formation of these compounds were combined with formation of monoclinic phase (m)from transformation of nontransformable tetragonal phase (t').

Evaluation of Spatial Resolution of Nondestructive Testing of Thermal Barrier Coating by Terahertz Imaging

2012 ◽  
Vol 132 (10) ◽  
pp. 864-870
Author(s):  
Tetsuo Fukuchi ◽  
Norikazu Fuse ◽  
Mitsutoshi Okada ◽  
Tomoharu Fujii ◽  
Maya Mizuno ◽  
...  
Keyword(s):  
Nondestructive Testing ◽  
Thermal Barrier Coating ◽  
Spatial Resolution ◽  
Terahertz Imaging ◽  
Thermal Barrier ◽  
Barrier Coating

Surface Roughness Measurement of Thermal Barrier Coating using Terahertz Waves

2017 ◽  
Vol 137 (3) ◽  
pp. 147-152 ◽  
Author(s):  
Tetsuo Fukuchi ◽  
Norikazu Fuse ◽  
Mitsutoshi Okada ◽  
Tomoharu Fujii ◽  
Maya Mizuno ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Roughness Measurement ◽  
Terahertz Waves ◽  
Surface Roughness Measurement ◽  
Barrier Coating

Structure Evolution of 7YSZ Thermal Barrier Coating During Thermal Shock Testing

2015 ◽  
Vol 30 (12) ◽  
pp. 1261
Author(s):  
ZHANG Xiao-Feng ◽  
ZHOU Ke-Song ◽  
ZHANG Ji-Fu ◽  
ZHANG Yong ◽  
LIU Min ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coating ◽  
Structure Evolution ◽  
Thermal Barrier ◽  
Shock Testing ◽  
Barrier Coating
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