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A Si–Mo–W Coating to Protect SiC‐Coated Carbon/Carbon Composites Against Oxidation
Author(s) -
Fu QianGang,
Li HeJun,
Li KeZhi,
Tong Ke
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03144.x
Subject(s) - coating , materials science , composite material , scanning electron microscope , microstructure , reinforced carbon–carbon , carbon fibers , penetration (warfare) , oxygen , composite number , chemistry , operations research , engineering , organic chemistry
In order to protect carbon/carbon (C/C) composites against oxidation, a Si–Mo–W coating was prepared on the surface of SiC‐coated C/C composites by a simple reaction method. The microstructures of the as‐received coating were characterized by scanning electron microscopy, X‐ray diffraction, and energy dispersive spectroscopy analyses. The results show that the SiC/Si–Mo–W coating can protect C/C composites from oxidation in air at 1673 K for 220 h with a mass loss of 0.003%, and at 1773 K for 252 h with a mass gain of 1.56%. The excellent oxidation‐resistant property of the SiC/Si–Mo–W coating at 1673–1773 K is attributed to the formation of SiO 2 film on the coating surface. The mass loss of the coated C/C composites during the oxidation test at 1873 K in air primarily resulted from the reaction of C/C substrate and oxygen diffusing through the penetration cracks in the coating.