Varied linear phason strain and its induced domain structure in quasicrystalline precipitates of Zr-Al-Ni-Cu-Nb bulk metallic glass matrix composites
Varied linear phason strain and its induced domain structure in quasicrystalline precipitates of Zr-Al-Ni-Cu-Nb bulk metallic glass matrix composites
复制标题
Zr-Al-Ni-Cu-Nb块体金属玻璃基复合材料准晶析出物中的变化线性相子应变及其诱导域结构
DOI：
10.1557/jmr.2012.351
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发表时间：
2012-12
影响因子：
2.7
通讯作者：
Sun, Yufeng
中科院分区：
文献类型：
--
作者：
Lu, Lu;Xiong, Dongxia;Wang, Jianbo;Zhao, Dongshan;Sun, Yufeng
用透射电子显微镜系统地研究了ZrAlNiCuNb合金中的准晶析出相。结果表明，沉淀物中总含有各种线性相位子应变。通过电子衍射分析，确定了只有一个非零元的应变矩阵描述的两种垂直于入射光束方向不同的线性相量应变。通过测量衍射点的偏差并与它们的倒易晶格矢量的垂直分量进行定量拟合，得到了相子应变矩阵。磁区结构是由沿等概率方向的线性相子应变变量形成的。电子衍射和高分辨率电子成像为这一结果提供了支持证据。
Quasicrystalline precipitates in ZrAlNiCuNb alloy were systematically studied by transmission electron microscopy. It was found that precipitates always contain various linear phason strains. By electron diffraction analysis, two types of linear phason strain with two different directions perpendicular to the incident beam described by strain matrices with only one nonzero element were identified. After measuring the deviations of diffraction spots and quantitatively fitting against their perpendicular components of the reciprocal lattice vectors, the phason strain matrices were obtained. Domain structures formed as a result of linear phason strain variants along directions with equal probability. Electron diffraction and high-resolution electron imaging provide supportive evidence of this result.