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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 >Nanocrystal composites in Zr-Nb-Cu-Al metallic glasses
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Nanocrystal composites in Zr-Nb-Cu-Al metallic glasses

机译：Zr-Nb-Cu-Al金属玻璃中的纳米晶体复合材料

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摘要

Adding Nb to Zr-Cu-Al amorphous alloys induces the primary transformation occurring on heating. Nanocrystalline-amorphous composites were produced by annealing Zr70-yNbxCu30-xAly (X= 5-7.5 and y= 8-12 at.%) metallic glasses. Their structures, after completing the primary transformation by annealing, were found to consist of fine crystals with a scale less than 15 nm dispersed homogeneously in an amorphous matrix. The nanostructured alloys show increased tensile strength and hardness with good bending ductility at a volume fraction of nanoparticles less than 50%,. We suggest that the stronger attractive interaction between Zr-Al is the reason of the presence of the quenched-in embryos in as-solidified samples, and the quenched-in embryos therefore provide nucleation sites for nanocrystal formation. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 15]
机译：在Zr-Cu-Al非晶态合金中添加Nb会引起加热时发生的初次转变。通过对Zr70-yNbxCu30-xAly（X = 5-7.5和y = 8-12 at。％）金属玻璃进行退火来生产纳米晶-非晶态复合材料。在通过退火完成一次转化后，发现它们的结构由尺寸小于15 nm的细小晶体均匀分散在非晶态基质中组成。纳米结构合金在小于50％的纳米颗粒的体积分数下显示出增加的拉伸强度和硬度以及良好的弯曲延展性。我们认为，Zr-Al之间更强的吸引力相互作用是凝固样品中存在淬火胚的原因，因此，淬火胚为纳米晶体的形成提供了成核位点。 （C）2000 Elsevier Science B.V.保留所有权利。 [参考：15]

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