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首页> 外文会议>International Conference on Composite Materials Science and Technology >Phase Evolution - Property Relationships of PIMed 5-40 Vol. SiCp - Reinforced Aluminium Composite
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Phase Evolution - Property Relationships of PIMed 5-40 Vol. SiCp - Reinforced Aluminium Composite

机译：阶段演化 - PIMED 5-40 Vol。％SICP - 增强铝合金复合材料的性质关系

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摘要

Microstructure-mechanical property relationships of powder injection molded aluminium composite reinforced with 5 - 40 vol.% silicon carbide particulate(SiCp)has been investigated via thermal and phase analyses along with density and hardness testing.The samples were injection molded and sintered at 645 - 800 °C in N2 atmosphere.Thermal analysis showed endothermic reactions around 632 - 643 °C,related to liquid phase formation.Exothermic reactions about 458 - 461 °C and weight gains around 471 - 479 °C were plausibly associated with AlN formation,which facilitated liquid phase sintering.The composite microstructure exhibited close interfaces between SiCp - Al and Al - Al for 5-20 vol.% SiCp addition.Higher SiCp addition however led to SiCp clustering,creating large pores and unreacted SiCp - SiCp interface,which prohibited both liquid flow and rearrangement of the solid grains and pore fdling during liquid phase sintering.Optimum SiCp addition was achieved at 15 vol.%,giving the maximum bulk density at 2.68 g.cm~(-3)or at 94.2 % theoretical density.The maximum macro Vickers hardness values at 138.9 and 166.6 Hv were obtained in the as - sintered and age - hardened conditions respectively.
机译：用5 - 40体积5-40体积的粉末注射成型铝复合材料的组织 - 机械性能关系。通过热量和硬度试验研究了碳化硅颗粒（SICP）的碳化硅颗粒（SICP）。样品注射成型并在645时烧结 - 在N 2大气中的800℃。热分析显示出约632-443℃的吸热反应，与液相形成有关。热量反应约458-461℃和471-479℃的重量增量与ALN形成相关，促进液相烧结。复合微观结构在SiCP - Al和Al - Al之间表现出5-20体积的紧密界面。％SICP添加。但是L导出SICP聚类，造成大型孔隙和未反应的SICP - SICP接口，禁止在液相烧结期间固体晶粒和孔叉的液体流量和重排。在15体积％的情况下实现了优化SICP加法。％，给出了Maximu M堆积密度为2.68 g.cm〜（-3）或约94.2％的理论密度。分别在烧结和年龄硬化条件下获得138.9和166.6 HV的最大宏观维克硬度值。

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