High temperature oxidation protection of γ-titanium aluminide using (Cr,Al)ON coatings deposited by high-speed physical vapor deposition

2017 ◽  
Vol 332 ◽  
pp. 2-11 ◽  
Author(s):  
K. Bobzin ◽  
T. Brögelmann ◽  
C. Kalscheuer ◽  
T. Liang
Keyword(s):  
High Temperature ◽  
Vapor Deposition ◽  
Titanium Aluminide ◽  
Physical Vapor Deposition ◽  
High Speed ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Protection

Glass coatings on stainless steels for high-temperature oxidation protection: Mechanisms

2014 ◽  
Vol 82 ◽  
pp. 316-327 ◽  
Author(s):  
Minghui Chen ◽  
Wenbo Li ◽  
Mingli Shen ◽  
Shenglong Zhu ◽  
Fuhui Wang
Keyword(s):  
High Temperature ◽  
Stainless Steels ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Protection ◽  
Protection Mechanisms

Arc-Spraying Composite Coatings on Mild Steel for Long-Term High-Temperature Oxidation Protection

2013 ◽  
Vol 690-693 ◽  
pp. 2039-2045
Author(s):  
Zhong Li Zhang ◽  
Qi Shen Wang ◽  
Peng Rao Wei ◽  
Xue Gong
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Protective Coatings ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Arc Spraying ◽  
Al Alloy ◽  
Temperature Oxidation ◽  
Oxidation Protection

An arc-spraying composite coating system for high-temperature oxidation protection is composed of an inner Fe-Cr-Al alloy layer and an Al-Si alloy outer layer. The high-temperature oxidation behavior of the composite coatings on steel substrate was studied during isothermal exposures in air at 900°C. Experiments show that the coatings on steel substrate are not deteriorated and the substrate is protected well, being exposed to high temperatures up to 900°C. Inter diffusion of alloying elements within the protective coatings occur, while the elements, Cr and Al, are also diffusing to the core of the base metal. As test time proceeds, a large number of chromium oxides are generated in situ within the protective coatings, especially close to the coating/substrate interface. The oxides generated increase the bond strength of the coating to the steel substrate, and together with the surface alumina they provide a long-term effective anti-oxidant protection to steel substrate. The results on titanium sponge production site show that the protective coatings on the reactor have provided an effective protection and prolong the lifetime at least forty percent for the reactors.

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