Microstructure and anti-oxidation property of Si–W–Cr coating for SiC coated carbon–carbon composites

Xia, Qiang; Li, Hejun; Zhang, Yulei; Guo, Linjun; Wei, Jianfeng

doi:10.1016/j.jallcom.2011.04.069

Cited by 13 publications

(5 citation statements)

References 19 publications

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“…And some holes and cracks are also found in the PC SiC coating due to the grains piling up not close and the mismatch of CTE between SiC coating and C/C substrate. These defects could supply diffusion channels for oxygen, which will react with C/C matrix and result in failure of single PC SiC coating . On the other hand, the defects in the PC SiC coating and rough surface of the coating could make the outer layer have strong interface bonding with PC SiC coated C/C matrix .…”

Section: Resultsmentioning

confidence: 99%

“…These defects could supply diffusion channels for oxygen, which will react with C/C matrix and result in failure of single PC SiC coating. 26 On the other hand, the defects in the PC SiC coating and rough surface of the coating could make the outer layer have strong interface bonding with PC SiC coated C/C matrix. 27 Therefore, PC SiC coating was produced as the buffer layer of the special coating systems for C/C composites.…”

Section: Methodsmentioning

confidence: 99%

“…Carbon/carbon (C/C) composites, which have advantageous properties, such as low density, high strength-to-weight ratio, excellent thermal shock resistance, and nonbrittle fracture behavior at elevated temperatures, are considered as the promising candidate materials in aerospace industry. [1][2][3] Unfortunately, C/C composites will start oxidation at low temperature (723 K) in aerobic environment, which prevents C/C composites from being applied widely in high-temperature structural components. 4,5 The key for solving this problem is to explore new coating technologies and oxidation-resistant coating systems.…”

Section: Introductionmentioning

confidence: 99%

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Oxidation resistance of SiC nanowires reinforced SiC coating prepared by a CVD process on SiC‐coated C/C composites

Xia

Zhang

et al. 2018

Int J Applied Ceramic Tech

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Oxidation protective SiC nanowires‐reinforced SiC (SiCNWs‐SiC) coating was prepared on pack cementation (PC) SiC‐coated carbon/carbon (C/C) composites by a simple chemical vapor deposition (CVD) process. This double‐layer SiCNWs‐SiC/PC SiC‐coating system on C/C composites not only has the advantages of SiC buffer layer but also has the toughening effects of SiCNWs. The microstructure and phase composition of the nanowires and the coatings were examined by SEM, TEM, and XRD. The single‐crystalline β‐SiC nanowires with twins and stacking faults were deposited uniformly and oriented randomly with diameter of 50‐200 nm and length ranging from several to tens micrometers. The dense SiCNWs‐SiC coating with some closed pores was obtained by SiC nanocrystals stacked tightly with each other on the surface of SiCNWs. After introducing SiCNWs in the coating system, the oxidation resistance is effectively improved. The oxidation test results showed that the weight loss of the SiCNWs‐SiC/PC SiC‐coated samples was 4.91% and 1.61% after oxidation at 1073 K for 8 hours and at 1473 K for 276 hours, respectively. No matter oxidation at which temperature, the SiCNWs‐SiC/PC SiC‐coating system has better anti‐oxidation property than the single‐layer PC SiC coating or the double‐layer CVD SiC/PC SiC coating without SiCNWs.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Oxidation resistance of SiC nanowires reinforced SiC coating prepared by a CVD process on SiC‐coated C/C composites

Xia

Zhang

et al. 2018

Int J Applied Ceramic Tech

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“…A C C E P T E D ACCEPTED MANUSCRIPT 3 times higher than that of conventional CVI process. CLVD process combines the advantages of both continual vapor deposition of chemical vapor infiltration process and high liquid infiltration efficiency of PIP process, thus it improves the efficiency of deposition, shortens the preparation period.…”

Section: A N U S C R I P Tmentioning

confidence: 96%

“…It is well known that they are ideal materials as aerospace materials in nozzles of solid rocket motor, sharp leading edges for hypersonic vehicles, and heat shields [1][2][3]. However with the development of new spacecrafts, currently used C/C composites can not meet all the demands of the components [4].…”

Section: Introductionmentioning

confidence: 99%