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High volume fraction TiC_x/Al composites with good comprehensive performance fabricated by combustion synthesis and hot press consolidation

机译:通过燃烧合成和热压固结制备的具有高综合性能的高体积分数TiC_x / Al复合材料

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摘要

In situ high volume fraction (50-70 vol.%) TiCx/Al composites were successfully fabricated by combustion synthesis and hot press consolidation in an Al-Ti-C system. Microstructure characterization of the TiCx/Al composites shows relatively uniform distribution of the TiCx particles with the particle size in the range of about 1-5 μm. All of the yield strength (σ_(0.2)), hardness and abrasive wear resistance of the TiC_x/Al composites increase with the increase in the TiC_x content, and the σ_(UCS) firstly increases and then decreases. The σ_(0.2).σ_(UCS), fracture strain (ε_f) and hardness of the 70 vol.% TiC_x/Al composite are 576 MPa, 744 MPa, 3.09% and 253.5 ± 6 Hv, respectively. The abrasive wear resistance of the 70 vol.% TiC_c/Al composite is about 4 times higher than that of the cast hypereutectic Al-Si alloy when the applied load is no more than 25 N and the Al_2O_3 abrasive particle size is no more than 20 μm.
机译:通过燃烧合成和热压固结在Al-Ti-C系统中成功地原位制备了高体积分数(50-70%(体积))的TiCx / Al复合材料。 TiCx / Al复合材料的微观结构表征显示,粒径在约1-5μm范围内的TiCx颗粒分布相对均匀。 TiC_x / Al复合材料的所有屈服强度(σ_(0.2)),硬度和耐磨性都随TiC_x含量的增加而增加,而σ_(UCS)首先增加然后减小。 70%(体积)TiC_x / Al复合材料的σ_(0.2).σ_(UCS),断裂应变(ε_f)和硬度分别为576 MPa,744 MPa,3.09%和253.5±6 Hv。当施加的载荷不超过25 N且Al_2O_3磨料粒度不超过20时,70%(体积)TiC_c / Al复合材料的耐磨性比铸造的过共晶Al-Si合金高约4倍。微米

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  • 来源
    《Materials Science and Engineering》 |2011年第5期|p.1931-1936|共6页
  • 作者单位

    Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University,No. 5988 Renmin Street, Changchun, 130025, PR China;

    Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University,No. 5988 Renmin Street, Changchun, 130025, PR China;

    Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University,No. 5988 Renmin Street, Changchun, 130025, PR China;

    Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University,No. 5988 Renmin Street, Changchun, 130025, PR China;

    Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University,No. 5988 Renmin Street, Changchun, 130025, PR China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    mechanical characterization ceramics composites wear;

    机译:机械表征陶瓷复合材料磨损;

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