Journal
JOURNAL OF THERMAL SPRAY TECHNOLOGY
Volume 22, Issue 5, Pages 744-755Publisher
SPRINGER
DOI: 10.1007/s11666-013-9895-x
Keywords
copper; gas shroud; hybrid plasma torch; influence of spray parameters; nuclear fusion; oxidation; tungsten
Categories
Funding
- Czech Ministry of Industry and Trade [FR-TI2/702]
- Technology Agency of the Czech Republic [TA01010300]
Ask authors/readers for more resources
Tungsten-based coatings have potential application in the plasma-facing components in future nuclear fusion reactors. By the combination of refractory tungsten with highly thermal conducting copper, or steel as a construction material, functionally graded coatings can be easily obtained by plasma spraying, and may result in the development of a material with favorable properties. During plasma spraying of these materials in the open atmosphere, oxidation is an important issue, which could have adverse effects on their properties. Among the means to control it is the application of inert gas shrouding, which forms the subject of this study and represents a lower-cost alternative to vacuum or low-pressure plasma spraying, potentially applicable also for spraying of large surfaces or spacious components. It is a continuation of recent studies focused on the effects of various parameters of the hybrid water-argon torch on the in-flight behavior of copper and tungsten powders and the resultant coatings. In the current study, argon shrouding with various configurations of the shroud was applied. The effects of torch parameters, such as power and argon flow rate, and powder morphology were also investigated. Their influence on the particle in-flight behavior as well as the structure, composition and properties of the coatings were quantified. With the help of auxiliary calculations, the mass changes of the powder particles, associated with oxidation and evaporation, were assessed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available