Title of article :
Fabrication and Characterization of In Situ Synthesized SiC/Al Composites by Combustion Synthesis and Hot Press Consolidation Method
Author/Authors :
Yang, Hongyu National Demonstration Center for Experimental Materials Science and Engineering Education - Jiangsu University of Science and Technology - Zhenjiang , China , Yuan, Yanyan National Demonstration Center for Experimental Materials Science and Engineering Education - Jiangsu University of Science and Technology - Zhenjiang , China , Dong, Erting Department of Materials Engineering - Henan Institute of Technology - Xinxiang , China , Zhang, Bingqi Datang Northeast Electric Power Test and Research Institute - Changchun , China , Shu, Shili State Key Laboratory of Luminescence and Applications - Changchun Institute of Optics - Fine Mechanics and Physics - Chinese Academy of Sciences - Changchun , China
Abstract :
The in situ SiC/Al composites were fabricated in Al-Si-C systems with different Si/C mass ratios and holding time by the methodof combustion synthesis and hot press consolidation. The influences of Si/C mass ratio and holding time on the phase constitution,microstructure, and hardness of the composites were investigated. The results indicate that the increase of Si/C mass ratio leadsto more uniform size distribution of the SiC particles in the Al matrix. Moreover, by improving the Si/C mass ratio from 4 : 1 to5 : 1, the maximum size of SiC particle was reduced from 4.1𝜇m to 2.0𝜇m. Meanwhile, the percentage of submicroparticles wasincreased from 22% to 63%, and the average hardness value of the composites was increased by 13%. In addition, when the holdingtime is set to be fifteen minutes, the Al4C3phase did not exist in the composites because of its total reactions with Si atoms to formSiC particles, and the average hardness value was 73.8 HB
Keywords :
Fabrication , Characterization , Situ Synthesized SiC/Al Composites , Combustion Synthesis , Hot Press Consolidation Method
