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Processing of bulk A17075 alloy by spark plasma sintering

机译：通过火花等离子体烧结加工散装A17075合金

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The main advantages of powder metallurgy processing route are the possibility to produce near-net-shape compacts and to minimize the finish machining and material loss. The main problem in particle consolidation process is to suppress porosity, to remove oxide layers, and to retain the microstructure of powder materials. Spark plasma sintering (SPS) combines concurrent uniaxial pressure and direct heating by a pulsed DC current. Sintering occurs at relatively low temperatures for a short time and does not influence significantly the microstructure in the interiors of original powder particles. The efficiency of SPS in producing compacts with low porosity might be dependent on the distribution of particle size in original powder material. The gas atomized A17075 powder was sieved to several charges and then sintered by SPS. Microstructure of sintered compacts was studied by light and scanning electron microscopy. The phase composition was investigated using X-ray diffraction. The mechanical behaviour was tested by bending tests.
机译：粉末冶金加工途径的主要优点是生产近净形块的可能性，并最大限度地减少饰面加工和材料损失。颗粒固结过程中的主要问题是抑制孔隙率，去除氧化物层，并保留粉末材料的微观结构。火花等离子体烧结（SPS）结合了同时的单轴压力并通过脉冲DC电流直接加热。烧结在相对较低的温度下发生短时间，并且不会显着影响原始粉末颗粒的内部的微观结构。 SPS在具有低孔隙率的压块中的效率可能取决于原始粉末材料中粒径的分布。将气体雾化A17075粉末筛分为几个电荷，然后通过SPS烧结。通过光和扫描电子显微镜研究烧结块的微观结构。使用X射线衍射研究相组合物。通过弯曲试验测试机械行为。

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