Long-range and short-range F-type ordering in Zn–Mg–Ho icosahedral phase
Long-range and short-range F-type ordering in Zn–Mg–Ho icosahedral phase
复制标题
Zn-Mg-Ho二十面体相中的长程和短程F型有序化
DOI：
10.1016/s0921-5093(00)01209-0
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
T. Shimizu
中科院分区：
文献类型：
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作者：
T. Ishimasa;T. Shimizu
研究了Zn-Mg-Ho二十面体相F型超晶格的长程有序和短程有序行为。在Zn 60 Mg30 Ho 10组成下，在高温下退火的合金中观察到超晶格反射强度逐渐降低，即在544、549、559和563°C下。这一观测结果表明，长程有序参数在高温区减小。Zn_（60）Mg_（35）Ho_（5）合金中形成的无序二十面体相表现出与F型有序有关的圆形漫散射。电子显微镜显示，漫散射是由大约100纳米的畴引起的，它们根据反相关系而相关。
The behavior of the F-type superlattice in the Zn–Mg–Ho icosahedral phase was studied with respect to long-range ordering and short-range ordering. At the composition Zn60Mg30Ho10, a gradual decrease in intensities of superlattice reflections was observed in the alloys annealed at high temperatures, i.e. at 544, 549, 559 and 563°C. This observation indicated that the long-range order parameters decrease in the high temperature region. The disordered icosahedral phase formed in Zn60Mg35Ho5alloy exhibits circular diffuse scattering related to F-type ordering. Electron microscopy revealed that the diffuse scattering is caused by domains with approximate size of 100Å, which are related according to an anti-phase relationship.