Effect of Milling Time on the Microstructure and Tensile Properties of Ultrafine Grained Ni–SiC Composites at Room Temperature》.pdf

Journal of Materials Science Technology 31 (2015) 923–929 Contents lists available at ScienceDirect Journal of Materials Science Technology journal homepage: Effect of Milling Time on the Microstructure and Tensile Properties of Ultrafine Grained Ni–SiC Composites at Room Temperature Hefei Huang 1,*, Chao Yang 1, Massey de los Reyes 2, Yongfeng Zhou 1, Long Yan 1, Xingtai Zhou 1,** 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2 Institute of Materials Engineering, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia A R T I C L E I N F O Bulk metallic nickel–silicon carbide nano-particle (Ni–SiCNP ) composites, with milling time ranged from Article history: 8 to 48 h, were prepared in a planetary ball mill and sintered using a spark plasma sintering (SPS) Received 3 September 2014 furnace. The microstructure of the Ni–SiCNP composites was characterized by transmission electron Received in revised form microscopy (TEM) and their mechanical properties were investigated by tensile measurements. The 2 December 2014 TEM results showed well-dispersed SiCNP particles, either within the matrix, between twins or along Accepted 8 December 2014 grain boundaries (GB), as well as the presence of stacking faults and twin structures, characteristics of Available online 17 April 2015 materials with low stacking fault energy. Dislocation lines were also observed to interact with the SiCN