Journal
SURFACE ENGINEERING
Volume 32, Issue 10, Pages 713-724Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1743294415y.0000000031
Keywords
HVOF; Porosity; Hardness; Carbide; Diagnostic techniques; Cermet coatings; Thermal spray coatings; Nickel based; Manufacturing
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Funding
- Defence Materials Technology Centre
- Australian Government's Defence Future Capability Technology Centre (DFCTC) initiative
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Advanced particle diagnostic technology has been applied to establish process parameters to deposit high quality nickel based carbide cermet coatings for marine hydraulic applications. The cermet coatings are produced via the kerosene fuelled high velocity oxygen fuel (HVOF) spray process, which uses a hypersonic flame jet to melt and accelerate feedstock particles onto the component surfaces. The traditional 'trial and error' procedure is not technically robust, as well as being costly and time consuming. Instead, a superior method is implemented in the current study that performs real time monitoring of the process parameters associated with the HVOF flame jets. Subsequently, coatings can be produced with the knowledge of the inflight particle size, temperature and velocity profiles. The analytical results allow identification of suitable coating process parameters, which translate to coatings of lower porosity and enhanced mechanical performance.
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