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王万华,王红霞,任广笑,程伟丽,张少雄.热挤压对不同搅拌时间制备的纳米SiCp/Mg-9Al-1Zn复合材料组织和性能的影响[J].稀有金属材料与工程(英文),2017,46(10):2847~2851.[Wang Wanhua,Wang Hongxia,Ren Guangxiao,Cheng Weili and Zhang Shaoxiong.Effect of hot extrusion on the microstructure and mechanical properties of the SiCp/Mg-9Al-1Zn nanocomposite fabricated by different stir time[J].Rare Metal Materials and Engineering,2017,46(10):2847~2851.]
Effect of hot extrusion on the microstructure and mechanical properties of the SiCp/Mg-9Al-1Zn nanocomposite fabricated by different stir time
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Received:July 22, 2016  Revised:January 08, 2017
DOI:
Key words: SiCp/Mg-9Al-1Zn nanocomposite  stir time  bimodal microstructure  mechanical properties
Foundation item:国家自然科学基金项目;山西省国际合作项目;山西省高校科技创新项目
Author NameAffiliation
Wang Wanhua,Wang Hongxia,Ren Guangxiao,Cheng Weili and Zhang Shaoxiong  
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Abstract:
      1wt% SiC nanoparticles reinforced Mg-9Al-1Zn magnesium matrix composite was fabricated by stir casting and hot extrusion. Effect of stirring for 10min and 30min respectively on microstructure and mechanical properties of SiCp/Mg-9Al-1Zn nanocomposite was researched. The results show that the grains of the matrix in the as-cast SiCp/Mg-9Al-1Zn nanocomposite stirring for 30min are mainly refined. But the mechanical properties of nanocomposite decline due to the increase of agglomerated SiC nanoparticles and Mg17Al12 phases with network morphology along the grain boundaries. After hot extrusion, a bimodal microstructure composed of alternate arrays of fine DRXed grains and relatively coarse DRXed grains is formed. Particularly, for as-extrusion nanocomposites stirring for 30min, the fine DRXed region can be increased and the distribution of SiC nanoparticles is more homogenous, which can exhibit superior mechanical properties compared with as-extruded SiCp/Mg-9Al-1Zn nanocomposite stirring for 10min.
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