Water vapor corrosion resistance and failure mechanism of SiCf/SiC composites completely coated with plasma sprayed tri-layer EBCs

2021 ◽  
Author(s):  
Gui Li ◽  
Lu Qin ◽  
Xueqiang Cao ◽  
Xiangrong Lu ◽  
Yunwei Tu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Water Vapor ◽  
Failure Mechanism ◽  
Sic Composites ◽  
Plasma Sprayed ◽  
Water Vapor Corrosion

Water vapor corrosion behavior and failure mechanism of plasma sprayed mullite/Lu2Si2O7-Lu2SiO5 coatings

2018 ◽  
Vol 44 (12) ◽  
pp. 14177-14185 ◽  
Author(s):  
Xunxun Hu ◽  
Fangfang Xu ◽  
Kunwei Li ◽  
Gen Jin ◽  
Yue Xu ◽  
...  
Keyword(s):  
Water Vapor ◽  
Failure Mechanism ◽  
Corrosion Behavior ◽  
Plasma Sprayed ◽  
Water Vapor Corrosion

High Temperature Hydro Corrosion Resistance of Silica Based Oxide Ceramics

2003 ◽  
Author(s):  
Shunkichi Ueno ◽  
Naoki Kondo ◽  
D. Doni Jayaseelan ◽  
Tatsuki Ohji ◽  
Shuzo Kanzaki
Keyword(s):  
Phase Transition ◽  
Corrosion Resistance ◽  
Surface Layer ◽  
Water Vapor ◽  
High Temperature ◽  
Corrosion Test ◽  
Oxide Ceramics ◽  
Rich Phase ◽  
Water Vapor Corrosion ◽  
Phase Phase

Water vapor corrosion behavior of Ln2Si2O7 (Ln = Nd, Er, Lu), mullite, CaYb4Si3O13 and Al2O3 were investigated at 1500°C. In Ln2Si2O7 phases, Ln = Nd and Er samples were completely dissolved in water vapor environment. CaYb4Si3O13 phase underwent decomposition during the corrosion test. Lu2Si2O7 and mullite showed excellent water vapor corrosion protection. In the case of mullite, Al2O3 rich phase was formed on the surface and the corrosion progression was successfully protected. In the case of Lu2Si2O7 phase, phase transition occurred and the grain boundaries of surface layer were slightly corroded by the corrosion test.

Water vapor corrosion behaviors of plasma sprayed RE2SiO5 (RE = Gd, Y, Er) coatings

2020 ◽  
Vol 167 ◽  
pp. 108529 ◽  
Author(s):  
Yawen Wang ◽  
Yaran Niu ◽  
Xin Zhong ◽  
Minhao Shi ◽  
Fengqi Mao ◽  
...  
Keyword(s):  
Water Vapor ◽  
Corrosion Behaviors ◽  
Plasma Sprayed ◽  
Water Vapor Corrosion

Water vapor corrosion behaviors of plasma sprayed ytterbium silicate coatings

2020 ◽  
Vol 46 (18) ◽  
pp. 28237-28243
Author(s):  
Yawen Wang ◽  
Yaran Niu ◽  
Xin Zhong ◽  
Minhao Shi ◽  
Fengqi Mao ◽  
...  
Keyword(s):  
Water Vapor ◽  
Corrosion Behaviors ◽  
Plasma Sprayed ◽  
Ytterbium Silicate ◽  
Water Vapor Corrosion

Fabrication and Water-vapor Corrosion Resistance of Ba0.25Sr0.75Al2Si2O8 Environmental Barrier Coating

2011 ◽  
Vol 26 (7) ◽  
pp. 701-706 ◽  
Author(s):  
Lin-Jing LU ◽  
Lai-Fei CHENG ◽  
Zhi-Liang HONG ◽  
Yi-Guang WANG ◽  
Li-Tong ZHANG
Keyword(s):  
Corrosion Resistance ◽  
Water Vapor ◽  
Environmental Barrier ◽  
Environmental Barrier Coating ◽  
Barrier Coating ◽  
Water Vapor Corrosion

Comparison of Water Vapor Corrosion Behaviors of Ln2Si2O7 (Ln=Yb and Lu) and ASiO4 (A=Ti, Zr and Hf) EBC's

2006 ◽  
Vol 317-318 ◽  
pp. 557-560 ◽  
Author(s):  
Shunkichi Ueno ◽  
Daniel Doni Jayaseelan ◽  
Hideki Kita ◽  
Tatsuki Ohji ◽  
Hua Tay Lin
Keyword(s):  
Thermal Expansion ◽  
Corrosion Resistance ◽  
Water Vapor ◽  
Silicon Nitride ◽  
Corrosion Test ◽  
Coated Sample ◽  
Reaction Sintering ◽  
Thermal Expansion Mismatch ◽  
Corrosion Behaviors ◽  
Water Vapor Corrosion

The corrosion behaviors of Ln2Si2O7 (Ln=Yb and Lu) and ASiO4 (A=Ti, Zr and Hf) EBC's were examined at 1500oC in water vapor environment. These oxides were coated on silicon nitride specimens by oxidation-bonded reaction sintering technique. Among Ln2Si2O7 system, though the thermal expansion coefficient of Yb2Si2O7 phase is closer to silicon nitride than that of Lu2Si2O7 phase, the corrosion resistance of silicon nitride with Lu2Si2O7 EBC was higher than that of Yb2Si2O7 EBC sample. In these EBC materials, boundary silica phase was easily corroded by water vapor. Among ASiO4 system, though the corrosion rate of HfSiO4 bulk was larger than that of ZrSiO4 and TiSiO4 phases, the oxidation of the silicon nitride substrate for HfSiO4 coated sample was smaller than that of other two. Many cracks were in ASiO4 EBC layer during the corrosion test. The introduced crack length in HfSiO4 EBC layer is shorter than in ZrSiO4 EBC layer due to the thermal expansion mismatch between EBC materials and the silicon nitride substrate.

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