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Cu_(1-x)Au_x固溶体原子近邻结构的EXAFS研究 被引量:1

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摘要 本文用扩展X射线吸收精细结构谱(EXAFS)研究了Cu_(1-x)Au_x固溶体中Cu,Au原子近邻结构.文中分别给出了不同成分时Cu-Cu,Au-Au和Au-Cu 原子对间距,发现它们与成分有着各自不同的依赖关系.表明了Cu_(1-x)Au_x固溶体中结构畸变的特征.由各原子对的间距计算出的合金平均原子间距随成分的变化与X射线衍射测量的结果一致,对Vegard定律有正偏离.文中还讨论了原子近邻间距的变化对这种偏离的影响.结果也表明,Cu_(1-x)Au_x固溶体中Cu原子有较大的无序度.此外,文中还对EXAFS数据处理和误差分析做了仔细的考虑和一些新的尝试.
出处 《中国科学(A辑)》 CSCD 1992年第4期390-397,共8页 Science in China(Series A)
基金 国家自然科学资金
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