Ceramic materials like Chromium oxide and Aluminium oxide have high melting point. The combustion flame can reach up to 3000 centigrade. However, The velocity of particle may not allow ceramic powder to melt completely.
But I want to know can we coat these materials by optimizing process parameters like flow rate of fuel gas, air and powder feeder?
Many commercially available spray powders of Cr2O3, Al2O3 and ZrO2/Y2O3 are suitable for plasma spraying and not for flame spraying. However, there are also a pair of spray powders that have been optimized for flame spraying. For example, Castolin sells such powders for its flame spray gun DS 8000:
https://www.castolin.com/de-DE/product/metaceram-28060
https://www.castolin.com/de-DE/product/metaceram-28020
Many commercially available spray powders of Cr2O3, Al2O3 and ZrO2/Y2O3 are suitable for plasma spraying and not for flame spraying. However, there are also a pair of spray powders that have been optimized for flame spraying. For example, Castolin sells such powders for its flame spray gun DS 8000:
https://www.castolin.com/de-DE/product/metaceram-28060
https://www.castolin.com/de-DE/product/metaceram-28020
Please check
https://patentimages.storage.googleapis.com/73/07/e3/7962055d40b9d1/US4645716.pdf
https://patentimages.storage.googleapis.com/86/06/65/f2d1333d487357/US3655425.pdf
Yes Nisar, now it is possible. We have designed a new generation Hybrid-LVOF gun by which all ceramic coatings are possible. Please go through our publication Article High-performance Al2O3 Coating by Hybrid LVOF (Low Velocity ...
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