Deposition of graded SiO2/SiC coatings using high-velocity solution plasma spray |
| |
| Affiliation: | 1. Centro de Ciência e Tecnologia de Plasmas e Materiais – PlasMat, Instituto Tecnológico de Aeronáutica – ITA, São José dos Campos 12228-900, SP, Brazil;2. São Paulo State University – Unesp, Instituto de Ciência e Tecnologia, São José dos Campos 12247-004, SP, Brazil;1. Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, 75 Daxue Road, Zhengzhou 450052, China;2. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, China;2. Science and Technology of Advanced Functional Composite Materials Laboratory, Aerospace of Research Institute of Materials and Processing Technology, Beijing, 100076, China |
| |
| Abstract: | Carbon/carbon (C/C) composites are widely used in structural components, particularly in the aerospace and aeronautics sectors. However, the application of C/C composites is limited by low oxidation resistance at high temperatures. In order to overcome this problem, graded SiO2/SiC coatings were deposited on C/C composites by a high-velocity solution plasma spray (HVSPS) process. Graded coatings were formed by reactions between the Si(OH)4 sprayed liquid precursor and the C/C substrate; these reactions were promoted by the high temperature of the plasma torch. The morphologies, microstructures, and chemical compositions of the coatings were investigated by X-ray diffraction, Raman spectroscopy, Fourier-transform infrared spectroscopy, and scanning electron microscopy/energy-dispersive X-ray spectroscopy. By altering the deposition time, the coating thickness was controlled, therefore demonstrating SiC formation and realizing graded SiO2/SiC coatings. |
| |
| Keywords: | Solution plasma spray Supersonic plasma torch Ceramic coatings Graded coatings |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
