Coating graphite by thermal spraying is next to impossible. There have been several attempts to protect graphite against oxidation and wear by various spray coatings, but all this remained in the labs. Theoretically, you can apply to a siliconized graphite surface something with a very low coefficient of thermal expansion, but in practice it is hard to realize. Other methods, primarily CVD, are much more promising for graphite coating than thermal spraying.
Coating graphite by thermal spraying is next to impossible. There have been several attempts to protect graphite against oxidation and wear by various spray coatings, but all this remained in the labs. Theoretically, you can apply to a siliconized graphite surface something with a very low coefficient of thermal expansion, but in practice it is hard to realize. Other methods, primarily CVD, are much more promising for graphite coating than thermal spraying.
Pure carbides (WC, Cr3C2, TaC, TiC, SiC, B4C and others) can not be applied by thermal spraying. Only the mixtures of such carbides with soft metal, for example WC-Co or Cr3C2-NiCr, can be sprayed on metallic substrates by means of HVOF or plasma spraying.
Pure carbides (WC, Cr3C2, TaC, TiC, SiC, B4C and others) can not be applied by thermal spraying. Only the mixtures of such carbides with soft metal, for example WC-Co or Cr3C2-NiCr, can be sprayed on metallic substrates by means of HVOF or plasma spraying.
Thank you very much for all the responses. Can I use silicon carbide as bond coat?
Thank you very much for all the responses. Can I use silicon carbide as bond coat?
More
VOTE
Thank you very much. But can I achieve higher thickness say 100 microns, from CVD ?
Thank you very much. But can I achieve higher thickness say 100 microns, from CVD ?
More
VOTE
Coating graphite by thermal spraying is next to impossible. There have been several attempts to protect graphite against oxidation and wear by various spray coatings, but all this remained in the labs.
Theoretically, you can apply to a siliconized graphite surface something with a very low coefficient of thermal expansion, but in practice it is hard to realize. Other methods, primarily CVD, are much more promising for graphite coating than thermal spraying.
Coating graphite by thermal spraying is next to impossible. There have been several attempts to protect graphite against oxidation and wear by various spray coatings, but all this remained in the labs.
Theoretically, you can apply to a siliconized graphite surface something with a very low coefficient of thermal expansion, but in practice it is hard to realize. Other methods, primarily CVD, are much more promising for graphite coating than thermal spraying.
More
VOTE
Pure carbides (WC, Cr3C2, TaC, TiC, SiC, B4C and others) can not be applied by thermal spraying. Only the mixtures of such carbides with soft metal, for example WC-Co or Cr3C2-NiCr, can be sprayed on metallic substrates by means of HVOF or plasma spraying.
Pure carbides (WC, Cr3C2, TaC, TiC, SiC, B4C and others) can not be applied by thermal spraying. Only the mixtures of such carbides with soft metal, for example WC-Co or Cr3C2-NiCr, can be sprayed on metallic substrates by means of HVOF or plasma spraying.
More
VOTE
Addtional adhesion layer in between is not required.
http://www.toyotanso.com/Products/new_developed_products/everedkoteb.html
Article Sintered tantalum carbide coatings on graphite substrates: H...
Addtional adhesion layer in between is not required.
http://www.toyotanso.com/Products/new_developed_products/everedkoteb.html
Article Sintered tantalum carbide coatings on graphite substrates: H...
More
VOTE
What about if use plasma spray process for TaC coating on graphite ?
What about if use plasma spray process for TaC coating on graphite ?
More
VOTE
See attached file.
See attached file.
More
VOTE
Thank you sir. But have you ever tried with MCrAly bond coat ?
Thank you sir. But have you ever tried with MCrAly bond coat ?
More
VOTE
Suppose if we go for CVD process, by chance can your company can support us for R and D ?
Suppose if we go for CVD process, by chance can your company can support us for R and D ?
More
VOTE