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首页> 外文期刊>Chinese science bulletin >Preparation and mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures
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Preparation and mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures

机译：具有非晶和纳米晶结构的块状纯稀土金属的制备及机理研究

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摘要

The preparation and the mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures, which were produced by spark plasma sintering (SPS), were carried out in this paper. With different processing parameters, the amorphous, two phases of amorphous and nanocrystalline, and complete nanocrystalline microstructures have been obtained. The nano-grain sizes in the bulk nanocrystalline materials are found smaller than the original powder particles sizes, which may change the conventional viewpoint that the grains in the sintered bulk are generally coarser than the raw powder particles. The technique developed in the present work can be extended to the preparation of many other nano bulk metal materials, and thus enables the studies of the nano-size effects on the physical, chemical and mechanical properties of bulk nano materials.
机译：本文进行了火花等离子体烧结（SPS）生产的具有非晶和纳米晶结构的块状纯稀土金属的制备及机理研究。通过不同的加工参数，获得了非晶态，非晶态和纳米晶两相以及完整的纳米晶微结构。发现块状纳米晶体材料中的纳米颗粒尺寸小于原始粉末颗粒尺寸，这可能改变了常规观点，即烧结块体内的晶粒通常比原始粉末颗粒粗。本工作中开发的技术可以扩展到许多其他纳米块状金属材料的制备，因此可以研究纳米尺寸对块状纳米材料的物理，化学和机械性能的影响。

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