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Patent Details

Indian Institute of Technology (IIT) Roorkee 
High Temperature oxidation resistant glassy coating 
P.S Mishra and Kamlesh Chandra  
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2010-01-27 
Application Number:
Applied at:
Entered by:
Indian Institute of Technology (IIT) Roorkee 
This invention relates to a single layer high temperature oxidation resistant coating comprising of Alumina or lime, silica and carburizing compound in powder form and the process for preparation thereof comprising the steps of, (a) preparing the ceramic coating by appropriate mixture of powdered ceramic constituents based upon oxide and carbon based ceramics of suitable chemistry; (b) preparing a paste/paint like suspension of the mixture prepared in step (a) by mixing a fluid containing another ceramic constituent such that the paste/paint like suspension remains fluid for a short duration having desired setting time; (c) applying the paint like suspension immediately over polished surface of a component for further heat treatment with the help of brush to yield thin coating over it; (d) applying the desired heat treatment on the components by charging into a high temperature furnace having air as a medium so that the coating liquefies at the treatment temperature, remains adherent with component and does not allow any alternation in the chemistry of component being treated by decarbisation, carbisation or nitridation etc. 

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