Authors: Satish Tailor R M Mohanty P R Soni A V Doub
Publish Date: 2016/01/30
Volume: 69, Issue: 6, Pages: 1179-1191
Abstract
Powders of AlSi 2024Al and 6061Al were separately ball milled with 15 wt SiC reinforcement in a highenergy attrition ball mill using stainless steel balls for 8 h The ball milled powders were plasma sprayed on the weathering steel CorTen substrates to get Al–SiC composite coating with as much high volume fraction as possible of SiC The microstructure characteristics of coatings were examined by SEM XRD and image analyzer XRD studies showed SiCp embedment in the Al matrix after ball milling and nano grains in the ball milled powder and coatings The thickness of coating and hardness were measured The high adhesionstrength of the coatings observed might be attributed to higher degree of diffusion at the interface The wear behaviors of the coatings were carried out under pinondisc wear test machine for 50 N load Results showed that hardness and wear resistance of coatings depended on SiCp fraction and crystallite size in the matrix The results of mechanical and wear tests also indicated that highenergy attrition ball milling and addition of SiC particles increased the strength hardness and wear resistance of the coatingsThe authors gratefully acknowledge the financial support of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST «MISiS» Grant № К42014081 and financial experimental support of Malaviya National Institute of Technology Jaipur India and Council of Scientific and Industrial Research CSIRHQS Rafi Marg New Delhi110001 India
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