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OALib Journal期刊
ISSN: 2333-9721
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铁基块体非晶合金玻璃形成能力与特征自由体积的关系
DOI: 10.3724/SP.J.1037.2012.00417, PP. 1329-1334
Keywords: 块体非晶合金,自由体积,结构弛豫,玻璃转变,玻璃形成能力,热膨胀
Abstract:
运用循环热膨胀法获得了块体非晶合金与其晶态合金的体膨胀差曲线Δ(dV(T)/V0),由此定义出块体非晶合金的2个特征自由体积,即结构弛豫中释放出的自由体积ΔVf-sr和玻璃转变中生成的自由体积ΔVf-gt.Fe-(Er)-Cr-Mo-C-B系列块体非晶合金的实验结果表明非晶合金的玻璃形成能力与其特征自由体积关系密切,临界尺寸Dc最大的非晶合金的ΔVf-gt也最大;且Dc随ΔVf-sr变化趋势明显,Dc2或Dc可以拟合成ΔVf-sr的负指数函数,回归系数高达0.998.
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