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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 >Effect of Mo-Fe substitution on glass forming ability and thermal stability of Fe-C-B-Mo-Cr-W bulk amorphous alloys
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Effect of Mo-Fe substitution on glass forming ability and thermal stability of Fe-C-B-Mo-Cr-W bulk amorphous alloys

机译：Mo-Fe替代对Fe-C-B-Mo-Cr-W块体非晶态合金玻璃形成能力和热稳定性的影响

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摘要

Amorphous Fe67-xC10B9Mo7+xCr4W3 (x = 1-7 at.%) plates with 0.64 mm thickness were prepared by copper mold casting. The thermal properties and microstructural development during heat treatments were investigated by a combination of differential scanning calorimetry, differential thermal analysis, and X-ray diffraction. The glass forming ability (GFA) and activation energy for crystallization have a distinct dependence on Mo content. Fe62C10B9Mo12Cr4W3 was the best glass former in this study, demonstrating a supercooled liquid region, Delta T-x =51 K, and an activation energy for crystallization, Q=453 kJ/mol. The GFA of alloys in this system was governed by elastic strain optimization resulting directly from the variation in Mo content. Heat treatments were performed to demonstrate resistance to crystallization under typical processing conditions. Alloys in this system exhibited a three phased evolution during crystallization. A second set of heat treatments was performed to identify each phase. An analysis of phase evolution revealed a distinct dependence of phase evolution with stepwise substitution of Mo for Fe in this system.
机译：通过铜铸模制备厚度为0.64mm的非晶态Fe67-xC10B9Mo7 + xCr4W3（x = 1-7 at。％）板。通过差示扫描量热法，差示热分析和X射线衍射相结合的方法研究了热处理过程中的热性能和微观结构。玻璃形成能力（GFA）和结晶活化能对Mo含量有明显的依赖性。 Fe62C10B9Mo12Cr4W3是该研究中最好的玻璃成型剂，显示了过冷的液体区域Delta T-x = 51 K，以及结晶激活能Q = 453 kJ / mol。该系统中合金的GFA受弹性应变优化的支配，该优化直接来自Mo含量的变化。进行热处理以证明在典型加工条件下的抗结晶性。该系统中的合金在结晶过程中表现出三相演变。进行第二组热处理以识别每个相。对相演化的分析表明，在该系统中用Mo逐步取代Fe可以明显地依赖于相演化。

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