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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Microstructure refinement and hardening of Ag-20 wt.%Cu alloy by rapid solidification
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Microstructure refinement and hardening of Ag-20 wt.%Cu alloy by rapid solidification

机译：Ag-20 wt。％Cu合金的快速凝固细化和硬化

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摘要

Ag-20 wt.%Cu (wt%) hypoeutectic alloy has been rapidly solidified by means of planar flow casting technique. Two fcc solid solutions have been identified by X-ray diffraction. Microstructures have been observed by electron microscopy. A refinement of the eutectic microstructure, as well as of the Ag-rich primary phase, has been observed for high quenching rates, leading to a hardness value up to 235 Vickers. The lattice parameter and phase fraction of the Ag-rich solid solution increase as a function of quenching rates (i.e. wheel speed). The solidification processes occurring during rapid quenching have been described on the basis of thermodynamic and kinetic arguments.
机译：Ag-20wt。％Cu（wt％）的亚共晶合金已经通过平面流铸技术快速固化。通过X射线衍射鉴定出两种fcc固溶体。通过电子显微镜观察到微观结构。对于高淬火速率，已经观察到共晶微观结构以及富含银的初生相的细化，导致硬度值高达235维氏。富银固溶体的晶格参数和相分数随淬火速率（即车轮速度）的变化而增加。在快速淬火过程中发生的凝固过程已根据热力学和动力学论证进行了描述。

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