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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Liquid phase separation in immiscible Ag-Ni-Nb alloy and formation of crystalline/amorphous composite
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Liquid phase separation in immiscible Ag-Ni-Nb alloy and formation of crystalline/amorphous composite

机译：不相溶的Ag-Ni-Nb合金中的液相分离和结晶/非晶态复合物的形成

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摘要

Phase decomposition in liquid miscibility gap presents a unique opportunity for designing amorphous/crystalline composites with a multilayer structure. One of typical monotectic systems, Ag-Ni alloy, is selected, and element Nb is added in the Ag-Ni alloy. The new ternary Ag-Ni-Nb monotectic alloys are rapidly quenched by using melt spinning technique. It is revealed that the ternary alloy undergoes a liquid-liquid phase decomposition and forms two immiscible Ag-rich and NiNb-rich liquids. Subsequently, the immiscible liquids solidify into Ag-rich crystalline and NiNb-based amorphous phases, respectively. Self-assembled amorphous/crystalline composites with double layer and sandwich type structures have been developed. The structure of the alloy ribbons with a dependence on the composition changes from a particle-dispersed structure to double layer structure and to sandwich type structure. The phase formation and thermal property of the quenched alloys are investigated. The formation mechanism of the crystalline/amorphous composite structures has been discussed.
机译：液体混溶间隙中的相分解为设计具有多层结构的非晶/晶体复合材料提供了独特的机会。选择典型的单晶体系之一，Ag-Ni合金，并在Ag-Ni合金中添加元素Nb。新型三元Ag-Ni-Nb单晶合金通过熔融纺丝技术快速淬火。发现三元合金经历了液相-液相分解并形成了两种不混溶的富Ag和富NiNb的液体。随后，不混溶的液体分别固化成富含银的结晶相和基于NiNb的非晶相。已经开发了具有双层和夹心型结构的自组装非晶/晶体复合材料。依赖于组成的合金薄带的结构从颗粒分散结构变为双层结构和夹心型结构。研究了淬火合金的相形成和热性能。讨论了晶体/非晶复合结构的形成机理。

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