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Indian Institute of Technology (IIT) Roorkee 
A method of cladding/coating metallic powder on metallic substrate by microwave irradiation 
Apurbba Kumar Sharma and Dheeraj Gupta  
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2010-03-09 
Application Number:
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Indian Institute of Technology (IIT) Roorkee 
A method of cladding/coating of metallic and non-metallic powders on metallic substrate by microwave irradiation comprising steps of pre placement of powder particles on metallic substrate, exposure to microwave irradiation in a susceptor environment for cladding/coating followed by cooling and solidification to form a cladding/coating, wherein the coating takes place at a frequency of 2:45 GHz and power of 600 Watt-900 Watt for 3-6 minutes. Said metallic/non-metallic powder is masked with a masking material. Said masking material includes graphite which acts as a separator. Said separator is covered by a susceptor material used to facilitate microwave hybrid heating for initial coupling of microwaves with the metallic and non-metallic powders including ceramic. Said susceptor is such as charcoal. Said metallic substrate comprises cast iron, mild steel, stainless steel, and nickel based alloy including Inconel. Said metallic and/or non-metallic powders are preplaced on the metallic substrate. Said metallic powder for cladding is hard facing powder comprising of super alloy and cermets. 

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