nicral वाक्य

The content of this dissertation is about the modification of coatings by laser cladding nano - material on plasma - spraying coatings . introducing rapid prototyping into nano material processing , experimental researches on the selective sintering of nano material are carried out systematically , the main work accomplished and conclusions gotten in this dissertation are presented as follows : 1 under the aiding of plasma spraying , reasonable coating material systems are designed to fabricate alumina , nicral / a12o3 , nicral / a12o3 + 13 % wt . tio2 , nicral / wc - co coating