Influence of the preparation temperature on the phase, microstructure and anti-oxidation property of a SiC coating for C/C composites

Huang, Jianfeng; Zeng, Xierong; Li, Hejun; Xiong, Xinbo; Fu, Yewei

doi:10.1016/j.carbon.2004.01.066

Cited by 190 publications

(28 citation statements)

References 15 publications

(11 reference statements)

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“…According to FERGUS and WORRELL [23], once the pressure of the outward diffusion gas exceeds 0.1 MPa, the gas product can bubble through the SiO 2 film because of the low viscosity of glass layer at 1 623 K. So, after the gas bubbles break up, a big hole forms. The similar evidence can also be found in the work of HUANG et al [17]. As fewer defects are contained in the modified sample, thus, fewer holes are formed on the coating surface, and as a result the oxidation resistance of the coating improves obviously.…”

Section: Oxidation Behaviorssupporting

confidence: 60%

“…However, up to now, much work has been devoted to technologies of pack cementation [17], chemical vapor deposition (CVD) [18], laser-induced chemical decomposition (LICD) [19] and slurry-sintering [20] to prepare SiC coating on C/C composites, while little work has been performed on developing new techniques with potential applications. With respect to these developed technologies, CVD and LICD are regarded as expensive techniques that are difficult to achieve a perfectly dense structure.…”

Section: Introductionmentioning

confidence: 99%

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Improved oxidation resistance of chemical vapor reaction SiC coating modified with silica for carbon/carbon composites

Yang

Zou

Huang

et al. 2010

J. Cent. South Univ. Technol.

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To protect carbon/carbon (C/C) composites from oxidation, a SiC coating modified with SiO 2 was prepared by a complex technology. The inner SiC coating with thickness varying from 150 to 300 µm was initially coated by chemical vapor reaction (CVR): a simple and cheap technique to prepare the SiC coating via siliconizing the substrate that was exposed to the mixed vapor (Si and SiO 2 ) at high temperatures (1 923−2 273 K). Then the as-prepared coating was processed by a dipping and drying procedure with tetraethoxysilane as source materials to form SiO 2 to fill the cracks and holes. Oxidation tests show that, after oxidation in air at 1 623 K for 10 h and thermal cycling between 1 623 K and room temperature 5 times, the mass loss of the CVR coated sample is up to 18.21%, while the sample coated with modified coating is only 5.96%, exhibiting an obvious improvement of oxidation and thermal shock resistance of the coating. The mass loss of the modified sample is mainly contributed to the reaction of C/C substrate with oxygen diffusing through the penetrating cracks formed in thermal shock tests.

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Section: Oxidation Behaviorssupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Improved oxidation resistance of chemical vapor reaction SiC coating modified with silica for carbon/carbon composites

Yang

Zou

Huang

et al. 2010

J. Cent. South Univ. Technol.

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show abstract

“…Therefore, the oxidation rate would mainly be decided by the oxygen diffusion along the defects in this case. If the oxidation process is controlled by process (c), the oxidation weight loss is determined by the oxygen diffusion rate along the defects of SiC coating, which would result in quick weight loss rate [12] . In general, the oxidation process of the multi-layer coating is controlled by process that has the slowest oxygen diffusion rate.…”

Section: Resultsmentioning

confidence: 99%

Structure and oxidation behavior of a plasma sprayed yttrium silicates coated SiC-C/C with a glass outer sealant from 1 573K to 1 873K

Huang

Zeng

et al. 2008

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Different compositions of yttrium silicates coatings were deposited on SiC-C/C by plasma spraying and an outer borosilicate glass was applied on the yttrium silicates coatings surfaces. The structure of the multi-layer coatings was characterized by XRD and SEM analyses. High temperature oxidation behavior of the multi-layer coatings coated C/C composites was investigated. Results show that SiC/2SiO 2 •Y 2 O 3 /1.5SiO 2 • Y 2 O 3 / SiO 2 •Y 2 O 3 /glass multi-layer coating has better high temperature oxidation resistance, protecting carbon/ carbon composites from oxidation at 1 773 K in air for 164 h with the weight loss of 1.65%. The oxidation weight loss of the coated C/C with time accorded with parabolic rule in the temperature range 1 573 K-1 873 K; and the corresponding oxidation activation energy of the coated carbon/carbon composites is 132.2 kJ/mol.

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“…All the powders were analytical grade, and the temperature chosen was expecting a thicker coating. 19 The oxidation test was carried out in air at 1173 K and at 1773 K respectively. Thermal shock test was also carried out between 1773 K and room temperature.…”

Section: Methodsmentioning

confidence: 99%

Double layer ZrSi₂–ZrC–SiC/SiC oxidation protective coating for carbon/carbon composites

et al. 2015

Surface Engineering

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A ZrSi 2 -ZrC-SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi 2 , ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0?37 and 0?12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0?12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.

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Influence of the preparation temperature on the phase, microstructure and anti-oxidation property of a SiC coating for C/C composites

Cited by 190 publications

References 15 publications

Improved oxidation resistance of chemical vapor reaction SiC coating modified with silica for carbon/carbon composites

Improved oxidation resistance of chemical vapor reaction SiC coating modified with silica for carbon/carbon composites

Structure and oxidation behavior of a plasma sprayed yttrium silicates coated SiC-C/C with a glass outer sealant from 1 573K to 1 873K

Double layer ZrSi₂–ZrC–SiC/SiC oxidation protective coating for carbon/carbon composites

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Influence of the preparation temperature on the phase, microstructure and anti-oxidation property of a SiC coating for C/C composites

Cited by 190 publications

References 15 publications

Improved oxidation resistance of chemical vapor reaction SiC coating modified with silica for carbon/carbon composites

Improved oxidation resistance of chemical vapor reaction SiC coating modified with silica for carbon/carbon composites

Structure and oxidation behavior of a plasma sprayed yttrium silicates coated SiC-C/C with a glass outer sealant from 1 573K to 1 873K

Double layer ZrSi2–ZrC–SiC/SiC oxidation protective coating for carbon/carbon composites

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Product

Resources

About

Double layer ZrSi₂–ZrC–SiC/SiC oxidation protective coating for carbon/carbon composites