A rapid route for synthesizing Ti-(AlxTiy/UFG Al) core-multishell structured particles reinforced Al matrix composite with promising mechanical properties

作者：Hu, Zheng-Yang; Zhang, Zhao-Hui^*; Wang, Hu; Li, Sheng-Lin; Yin, Shi-pan; Song, Qi; Cheng, Xing-Wang

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2018, 721: 61-64.

DOI：10.1016/j.msea.2018.02.065

• Al matrix
• Core-multishell structure
• Ultrafine-grained Al-grains
• Tensile property

A new type of Al-matrix composites reinforced by in-situ Ti-(AlxTiy/Ultrafine-grained Al) core-multishell structured particles were successfully fabricated at relatively low temperature (450-580 degrees C) by SPS technique within a very short time. The composite sintered at 580 degrees C exhibits a yield strength improvement of 64.5% over the unreinforced matrix and a satisfactory elongation of 27%. The defects, UFG-Al grains and local-connection accelerated the Al-Ti inter-diffusion and consolidation process of composites. Although residual voids near AlxTiy/Al interface may induce the cracks, discontinuous tough intermetallic-phases inside AlxTiy layer and soft Ti-core can effectively decelerate the crack-propagation.

• 出版日期2018-4-4
• 单位北京理工大学