TY - JOUR
T1 - Preparation of SiC/Cr-Al-Si coating for C/C composites by two-step pack cementation method
AU - Huang, Min
AU - Li, Ke Zhi
AU - Li, He Jun
AU - Fu, Qian Gang
AU - Wang, Yu
AU - Luo, She Ji
PY - 2009
Y1 - 2009
N2 - SiC/Cr-Al-Si anti-oxidation coating on the surface of carbon-carbon composites is prepared by two-step pack cementation method. The phase compositions, microstructure and element distribution on the section of samples of the received SiC/Cr-Al-Si coating are studied by XRD, SEM, and the isothermal oxidation test of samples in air is finished at 1500°C. The study results show that a SiC/Cr-Al-Si coating of 120 mm thickness is obtained, which consists of mainly three phases of SiC, AlCr 2Si and Al 4Si 2C. Compared with the SiC coating prepared by one-step pack cementation method, the SiC/Cr-Al-Si coating prepared by two-step pack cementation method shows better oxidation resistance. The weight loss of the carbon-carbon sample with SiC/Cr-Al-Si coating is less than 5% after oxidizing for 12 hours. There are microcracks in the SiC/Cr-Al-Si coating, which is thought the main reason why the received SiC/Cr-Al-Si coating failed. In the secondary pack cementation, Cr-Al-Si diffuses into SiC coating but not covers on SiC coating, which is though the other reason why the received SiC/Cr-Al-Si coating failed.
AB - SiC/Cr-Al-Si anti-oxidation coating on the surface of carbon-carbon composites is prepared by two-step pack cementation method. The phase compositions, microstructure and element distribution on the section of samples of the received SiC/Cr-Al-Si coating are studied by XRD, SEM, and the isothermal oxidation test of samples in air is finished at 1500°C. The study results show that a SiC/Cr-Al-Si coating of 120 mm thickness is obtained, which consists of mainly three phases of SiC, AlCr 2Si and Al 4Si 2C. Compared with the SiC coating prepared by one-step pack cementation method, the SiC/Cr-Al-Si coating prepared by two-step pack cementation method shows better oxidation resistance. The weight loss of the carbon-carbon sample with SiC/Cr-Al-Si coating is less than 5% after oxidizing for 12 hours. There are microcracks in the SiC/Cr-Al-Si coating, which is thought the main reason why the received SiC/Cr-Al-Si coating failed. In the secondary pack cementation, Cr-Al-Si diffuses into SiC coating but not covers on SiC coating, which is though the other reason why the received SiC/Cr-Al-Si coating failed.
KW - Carbon/carbon (C/C) composites
KW - Cr-Al-Si coating
KW - Oxidation resistant coating
KW - SiC coating
KW - Two-step pack cementation method
UR - http://www.scopus.com/inward/record.url?scp=84863338202&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:84863338202
SN - 1673-064X
VL - 24
SP - 89
EP - 92
JO - Xi'an Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of Xi'an Shiyou University, Natural Sciences Edition
JF - Xi'an Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of Xi'an Shiyou University, Natural Sciences Edition
IS - 2
ER -