Journal
JOURNAL OF THERMAL SPRAY TECHNOLOGY
Volume 19, Issue 6, Pages 1238-1243Publisher
SPRINGER
DOI: 10.1007/s11666-010-9544-6
Keywords
composite coatings; electrical resistivity; SiC; TiN; vacuum cold spray
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Funding
- National Natural Science Foundation of China [50705075]
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Three different contents of nano-sized TiN powers of 20 nm in size were added to nano-sized SiC powders of 40 nm. Vacuum cold spray (VCS) process was used to deposit SiC-TiN composite coatings on Al2O3 substrates. Microstructure and phase structure analysis of the samples was performed by scanning electron microscopy (SEM) and x-ray diffraction (XRD). Sheet resistance of the VCS coatings was measured using a four-point probe method. The influences of TiN additions on the electrical resistivity of SiC-TiN composite coatings and the conductive mechanisms were investigated. The electrical resistivity of SiC-TiN coatings decreases with increasing TiN contents, reaching a minimum of 1.82 Omega m with 50 mol% TiN.
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