The Application of Sic Coatings by CVD to Large CC Composite Parts for Enhanced Oxidation Resistance

2008 ◽  
pp. 832-839
Author(s):  
P. E. Grayson ◽  
N. J. Archer
Keyword(s):  
Oxidation Resistance ◽  
Enhanced Oxidation ◽  
Sic Coatings

scholarly journals Preparation of MCrAlY–Al2O3 Composite Coatings with Enhanced Oxidation Resistance through a Novel Powder Manufacturing Process

2019 ◽  
Vol 28 (3) ◽  
pp. 433-443 ◽  
Author(s):  
Mingwen Bai ◽  
Bo Song ◽  
Liam Reddy ◽  
Tanvir Hussain
Keyword(s):  
Oxidation Resistance ◽  
Manufacturing Process ◽  
Composite Powder ◽  
Composite Coatings ◽  
Submicron Particles ◽  
Second Phase ◽  
Mcraly Coatings ◽  
Powder Feedstock ◽  
Enhanced Oxidation ◽  
Powder Manufacturing

Abstract MCrAlY–Al2O3 composite coatings were prepared by high-velocity oxygen fuel thermal spraying with bespoke composite powder feedstock for high-temperature applications. Powder processing via a suspension route was employed to achieve a fine dispersion of α-Al2O3 submicron particles on the MCrAlY powder surface. This was, however, compromised by ~ 50% less flowability of the feedstock during spraying. Nevertheless, the novel powder manufacturing process introduced in this study has shown potential as an alternative route to prepare tailored composite powder feedstock for the production of metal matrix composites. In addition, the newly developed MCrAlY–Al2O3 composite coatings exhibited superior oxidation resistance, compared to conventional MCrAlY coatings, with the formation of nearly exclusively Al2O3 scale after isothermal oxidation at 900 °C for 10 h. The addition of α-Al2O3 particles in the MCrAlY coatings as a second phase was found to have promoted the formation of YAG oxides (YxAlyOz) during spraying and also accelerated the outwards diffusion of Al, which resulted in enhanced oxidation resistance.

Oxidation Resistance of HfB2-SiC Coatings for Pro...

2005 ◽  
Author(s):  
P. Lespade ◽  
N. Richet ◽  
P. Goursat
Keyword(s):  
Oxidation Resistance ◽  
Sic Coatings

scholarly journals Enhanced oxidation resistance of active nanostructures via dynamic size effect

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Yun Liu ◽  
Fan Yang ◽  
Yi Zhang ◽  
Jianping Xiao ◽  
Liang Yu ◽  
...  
Keyword(s):  
Size Effect ◽  
Oxidation Resistance ◽  
Enhanced Oxidation

Oxidation of nanocrystalline Mo–Si–N and nanolayered Mo–Si–N/SiC coatings

1999 ◽  
Vol 14 (9) ◽  
pp. 3552-3558 ◽  
Author(s):  
P. Torri
Keyword(s):  
Activation Energy ◽  
Water Vapor ◽  
Oxidation Resistance ◽  
Rate Constant ◽  
Arrhenius Plot ◽  
Single Layer ◽  
Water Vapor Atmosphere ◽  
Oxidation Properties ◽  
Sputter Deposited ◽  
Sic Coatings

Oxidation of sputter-deposited nanocrystalline Mo–Si–N (MoSi2.2N2.5) coatings in oxygen–water vapor atmosphere has been studied in the temperature range 400–850 °C. In addition, the oxidation properties of nanolayered Mo–Si–N/SiC coatings at 700 °C were studied and compared to those of single-layer coatings of both components. No pest disintegration was observed in Mo–Si–N up to 200 h of oxidation. A preexponential rate constant of (3.7 ± 0.5) × 109 (1015 atoms/cm2)2/h and activation energy 1.03 ± 0.02 eV were determined from an Arrhenius plot for parabolic oxygen buildup on Mo–Si–N. Up to 20% less oxygen was detected in the oxidized nanolayered coatings compared to either of the components as a single layer, indicating an improvement in oxidation resistance.

Oxidation Resistance of HfB2-SiC Coatings for Protection of Carbon Fiber Based Composites

2004 ◽  
Vol 264-268 ◽  
pp. 1047-1050 ◽  
Author(s):  
N. Richet ◽  
P. Lespade ◽  
Paul Goursat ◽  
E. Laborde
Keyword(s):  
Carbon Fiber ◽  
Oxidation Resistance ◽  
Sic Coatings

Synthesis of chemically bonded phosphate ceramic coatings with tailored curing behaviour and enhanced oxidation resistance

2020 ◽  
Vol 46 (12) ◽  
pp. 20448-20455
Author(s):  
Mei Yang ◽  
Fujiao Liu ◽  
Zhixing Guo ◽  
Bing Han ◽  
Xia Luo
Keyword(s):  
Oxidation Resistance ◽  
Ceramic Coatings ◽  
Enhanced Oxidation
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