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

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

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

Thermal cycling and oxidation resistance of B modified ZrB2–SiC coatings on SiC coated graphite

2015 ◽  
Vol 280 ◽  
pp. 330-337 ◽  
Author(s):  
Wang Peng ◽  
Zhou Shanbao ◽  
Zhang Xinghong ◽  
Gui Kaixuan ◽  
Li Yongxia ◽  
...  
Keyword(s):  
Thermal Cycling ◽  
Oxidation Resistance ◽  
Sic Coatings

Oxidation resistance of valve steels covered with thin SiC coatings, obtained by RF CVD

2018 ◽  
Vol 145 ◽  
pp. 16-25 ◽  
Author(s):  
Richard Gawel ◽  
Karol Kyzioł ◽  
Zbigniew Jurasz ◽  
Zbigniew Grzesik
Keyword(s):  
Oxidation Resistance ◽  
Sic Coatings

Deposition of SiO2/SiC Coating on Carbon Fiber to Enhance the Oxidation Resistance

2020 ◽  
Vol 999 ◽  
pp. 100-105
Author(s):  
Ai Ming Bu ◽  
Yong Fu Zhang ◽  
Yan Xiang ◽  
Yun Jie Yang ◽  
Wei Wei Chen ◽  
...  
Keyword(s):  
Fixed Point ◽  
Carbon Fiber ◽  
Oxidation Resistance ◽  
Photoelectron Spectroscopy ◽  
Relative Content ◽  
Properties Of Coatings ◽  
Spraying Parameters ◽  
Scanning Electronmicroscopy ◽  
Tg And Dtg ◽  
Sic Coatings

The objective of the present investigation is to study the oxidation resistance of SiO2/SiC coating on carbon fiber by electrolytic plasma spraying. The SiO2/SiC coating can be easily prepared within several tens seconds through this approach. The effect of spraying parameters (fixed point 5s and spray 5 times at the speed of 20mm/s) on the microstructure and oxidation resistance properties of coatings was discussed in this paper. Scanning electronmicroscopy (SEM), energy dispersive spectroscopy (EDS), x-ray photoelectron spectroscopy (XPS), thermogravimetric (TG) and DTG have been used to characterize the SiO2/SiC coatings. It was demonstrated that fixed-point spray 5s has better density and oxidation resistance coating, and the oxidation resistance increased by 12% compared with spray 5 times at the speed of 20mm/s. The fixed-point spray 5s coating was mainly composed of SiO2 and SiC. The SiO2 relative content was 72.6% and the SiC relative content was 27.4%.

Fabrication and Oxidation Resistance Property of SiC Coatings on Surface of Graphite by Chemical Liquid Deposition

2011 ◽  
Vol 55-57 ◽  
pp. 82-86
Author(s):  
Yun Hu Zhu ◽  
Hao Ran Geng ◽  
Guang Li Chen
Keyword(s):  
Optimum Condition ◽  
Mass Loss ◽  
Oxidation Resistance ◽  
Deposition Temperature ◽  
Test Results ◽  
Different Temperatures ◽  
Chemical Liquid Deposition ◽  
Liquid Deposition ◽  
Sic Coatings ◽  
Oxidation Behaviors

SiC coatings were fabricated by the Rapid Chemical Liquid Deposition (RCLD) on the surface of graphite, the influence of deposition temperature on the microstructure of SiC coatings was investigated, the oxidation behaviors of SiC coatings at different temperatures were analyzed. The results indicated that the optimum condition for the SiC coatings are at 1150°C, a smooth and dense coating will be obtained, the thickness of the coatings are between 80～120μm. The oxidation resistance test results indicated that after oxidation at 1000°C for 5h, the mass loss of the sample is only 21%.

Effect of phase composition on the oxidation resistance of ZrB2-SiC coatings

2022 ◽  
Author(s):  
Jianjie Hao ◽  
Jiayan Li ◽  
Binglin Zou ◽  
Xiaolong Cai ◽  
Wei Shi ◽  
...  
Keyword(s):  
Phase Composition ◽  
Oxidation Resistance ◽  
Sic Coatings

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

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