The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Pengyun Wang - One of the best experts on this subject based on the ideXlab platform.
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a c sic gradient oxidation Protective Coating for carbon carbon composites
Surface & Coatings Technology, 2006Co-Authors: Yulei Zhang, Jian Wei, Pengyun WangAbstract:In order to eliminate the mismatch of the thermal expansion coefficient between SiC Coating and C/C composites, a C/SiC gradient oxidation Protective Coating has been produced by a two-step technique. The first step is to prepare a slurry coated carbon layer, and the second one is to obtain a dense C/SiC concentration gradient Coating by a pack cementation technique. The structures of the Coatings were characterized by XRD, SEM and EDS analyses. Oxidation behaviour of the C/SiC coated C/C composites was also investigated. It was found that the as-prepared C/SiC gradient Coating could effectively improve the oxidation resistance of SiC Coating and could protect C/C composites from oxidation at 1773 K in air for 35 h with a weight loss of 2.46%. The gradient distributions of Si and C elements in the Coating, which can suppress the generation of the thermal stresses, induce the excellent anti-oxidation ability of the C/SiC gradient Coating.
Huang Jianfeng - One of the best experts on this subject based on the ideXlab platform.
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sicn sic oxidation Protective Coating for carbon carbon composites
Carbon, 2009Co-Authors: Huang Jianfeng, Liu Miao, Cao Liyun, Xia Changkui, Wu JianpengAbstract:Abstract Nano-SiC (SiCn) Coating was deposited on SiC pre-coated C/C composites by a hydrothermal electrophoretic deposition. The phase compositions, surface and cross-section microstructures, and anti-oxidation properties of the multilayer Coatings were investigated. Results show that hydrothermal electrophoretic deposition is an effective route to prepare smooth and homogeneous SiCn Coating on SiC–C/C composites. The as-prepared SiCn/SiC multilayer Coatings can effectively protect C/C composites from oxidation in air at 1773 K for 202 h with a weight loss of 0.79% and at 1873 K for 64 h with a weight loss of 1.3%.
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Progress on the oxidation Protective Coating of carbon-carbon composites
New Carbon Materials, 2005Co-Authors: Huang Jianfeng, Xiong Xin-bo, Zeng Xie-rong, Li Kezhi, Fu Ye-wei, Huang Min, C CompositesAbstract:The recent development of oxidation Protective Coating materials for C/C composites,such as glass,noble metal,ceramics and multi-layer Coating systems are reviewed.New advances in the traditional preparation technologies of carbon/carbon composite Coatings and the exploitation of new techniques for the preparation of oxidation Protective Coatings in recent years are also introduced.Combined with the future applications of coated carbon-carbon composites in aviation,spaceflight and military fields,the next development direction in the investigation of the oxidation resistant Coating is also proposed.It is shown that there is an obvious gap between the present research results and application in severe environments.The low preparation cost and long service life of the oxidation Protective Coating at high temperature and in a high rate gas eroding environment will be the main emphasis for future development.Improvement of the bonding between Coating and matrix and the exploitation of new preparation techniques are the most important topics in for future research.Multi-layer and gradient ceramic coated carbon/carbon composites could work for a long time at high temperature and in a high gas rate eroding environment.
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mullite al2o3 sic oxidation Protective Coating for carbon carbon composites
Carbon, 2003Co-Authors: Huang Jianfeng, Zeng Xierong, Li Hejun, Xiong Xinbo, Huang MinAbstract:In order to exploit the unique high temperature mechanical properties of carbon/carbon (C/C) composites, a new type of oxidation Protective Coating has been produced by a two-step pack cementation technique in an argon atmosphere. XRD analysis showed that the internal Coating obtained from the first step was a gradient SiC layer that acts as a buffer layer, and the multi-layer Coating formed in the second step was an Al2O3-mullite layer. It was found that the as-received Coating characterized by excellent thermal shock resistance on the surface of C/C composites during exposure to an oxidizing atmosphere at 1873 K, could effectively protect the C/C composites from oxidation for 45 h. The failure of the Coating is due to the formation of bubble holes on the Coating surface.
Yanhui Chu - One of the best experts on this subject based on the ideXlab platform.
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zrb2 sic gradient oxidation Protective Coating for carbon carbon composites
Ceramics International, 2014Co-Authors: Xuanru Ren, Yanhui ChuAbstract:Abstract To improve the oxidation Protective ability of carbon/carbon composites, ZrB 2 –SiC gradient Coating was prepared on the surface of C/C composites by an in-situ reaction method. The ZrB 2 –SiC gradient Coating consisted of an inner ZrB 2 –SiC layer and an outer ZrB 2 –SiC–Si Coating. The phase composition and microstructures of the multiphase Coating were characterized by XRD, EDS and SEM. Results showed that the inner Coating is mainly composed of ZrB 2 and SiC, while the outer multiphase Coating is composed of ZrB 2 , SiC and Si. The multilayer Coating is about 200 μm in thickness, which has no penetration crack or big hole. The oxidation behavior of the coated C/C composites at 1773 K in air was investigated. Results show that the gradient ZrB 2 –SiC oxidation Protective Coating could protect C/C from oxidation for 207 h with only (4.56±1.2)×10 −3 g/cm 2 weight loss, owing to the compound silicate glass layer with the existence of thermally stable phase ZrSiO 4 .
Yulei Zhang - One of the best experts on this subject based on the ideXlab platform.
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a c sic gradient oxidation Protective Coating for carbon carbon composites
Surface & Coatings Technology, 2006Co-Authors: Yulei Zhang, Jian Wei, Pengyun WangAbstract:In order to eliminate the mismatch of the thermal expansion coefficient between SiC Coating and C/C composites, a C/SiC gradient oxidation Protective Coating has been produced by a two-step technique. The first step is to prepare a slurry coated carbon layer, and the second one is to obtain a dense C/SiC concentration gradient Coating by a pack cementation technique. The structures of the Coatings were characterized by XRD, SEM and EDS analyses. Oxidation behaviour of the C/SiC coated C/C composites was also investigated. It was found that the as-prepared C/SiC gradient Coating could effectively improve the oxidation resistance of SiC Coating and could protect C/C composites from oxidation at 1773 K in air for 35 h with a weight loss of 2.46%. The gradient distributions of Si and C elements in the Coating, which can suppress the generation of the thermal stresses, induce the excellent anti-oxidation ability of the C/SiC gradient Coating.
Huang Min - One of the best experts on this subject based on the ideXlab platform.
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Progress on the oxidation Protective Coating of carbon-carbon composites
New Carbon Materials, 2005Co-Authors: Huang Jianfeng, Xiong Xin-bo, Zeng Xie-rong, Li Kezhi, Fu Ye-wei, Huang Min, C CompositesAbstract:The recent development of oxidation Protective Coating materials for C/C composites,such as glass,noble metal,ceramics and multi-layer Coating systems are reviewed.New advances in the traditional preparation technologies of carbon/carbon composite Coatings and the exploitation of new techniques for the preparation of oxidation Protective Coatings in recent years are also introduced.Combined with the future applications of coated carbon-carbon composites in aviation,spaceflight and military fields,the next development direction in the investigation of the oxidation resistant Coating is also proposed.It is shown that there is an obvious gap between the present research results and application in severe environments.The low preparation cost and long service life of the oxidation Protective Coating at high temperature and in a high rate gas eroding environment will be the main emphasis for future development.Improvement of the bonding between Coating and matrix and the exploitation of new preparation techniques are the most important topics in for future research.Multi-layer and gradient ceramic coated carbon/carbon composites could work for a long time at high temperature and in a high gas rate eroding environment.
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mullite al2o3 sic oxidation Protective Coating for carbon carbon composites
Carbon, 2003Co-Authors: Huang Jianfeng, Zeng Xierong, Li Hejun, Xiong Xinbo, Huang MinAbstract:In order to exploit the unique high temperature mechanical properties of carbon/carbon (C/C) composites, a new type of oxidation Protective Coating has been produced by a two-step pack cementation technique in an argon atmosphere. XRD analysis showed that the internal Coating obtained from the first step was a gradient SiC layer that acts as a buffer layer, and the multi-layer Coating formed in the second step was an Al2O3-mullite layer. It was found that the as-received Coating characterized by excellent thermal shock resistance on the surface of C/C composites during exposure to an oxidizing atmosphere at 1873 K, could effectively protect the C/C composites from oxidation for 45 h. The failure of the Coating is due to the formation of bubble holes on the Coating surface.
