Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 35, Issue 12, Pages 2942-2949Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2019.07.005
Keywords
Chemical vapor deposition (CVD); Zirconium carbide; Silicon carbide; Composite coatings; Co-deposition mechanism
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In this work, the ZrC-SiC composite coatings were co-deposited by chemical vapor deposition (CVD) using ZrCl4, MTS, CH4 and H-2 as raw materials. The morphologies, compositions and phases of the composite coatings were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The results indicated that the morphologies, compositions and phases of the composite coatings were related to the deposition temperature, the flow rate of the carrier H-2 gas, and the ratio of C/Zr. Moreover, the co-deposition mechanism of the composite coatings was also studied. It was found that different deposition temperatures resulted in different deposition mechanisms. At temperatures in the range of 1150-1250 degrees C, the ZrC-SiC co-deposition was controlled by the surface kinetic process. At temperatures in the range of 1250-1400 degrees C, the ZrC-SiC co-deposition was controlled by the mass transport process. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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