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首页> 外文期刊>Diffusion and Defect Data. Solid State Data, Part B. Solid State Phenomena >Morphology of tungsten growth forms in quasicrystalline AI_(65)Cu_(20)Fe_(14)W alloys
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Morphology of tungsten growth forms in quasicrystalline AI_(65)Cu_(20)Fe_(14)W alloys

机译：准晶AI_（65）Cu_（20）Fe_（14）W合金中钨生长形式的形态

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摘要

The growth morphology and arrangement of tungsten and β-phase (Al (Fe, Cu)) in Al-Cu-Fe-W alloy were analyzed. The composition of Al65Cu20Fe14W1 (at.%) was used for preparation of ingots containing the icosahedral quasicrystalline phase. The ingots were obtained in a two-stage process. At the first stage the induction melting of the elements and preliminary homogenization by mechanical mixing were carried out. The second stage was realized by vertical Bridgman technique of directional crystallization. The X-ray phase analysis, optical and scanning electron microscopy (SEM) observations and chemical analysis were performed. It was stated that the whiskers of tungsten were irregularly distributed in the volume of ingots. They often form a clump-like agglomerations. The whiskers have different diameters and length. Minimal diameter of the whiskers was about 10 - 100 nm and maximal - several dozen micrometers. The whiskers of tungsten formed a clump-like frames on which the membrane form of p-phase was stretched out or a non-planar oval forms.
机译：分析了Al-Cu-Fe-W合金中钨和β相（Al（Fe，Cu））的生长形态和排列。 Al65Cu20Fe14W1的组成（原子％）用于制备含有二十面体准晶相的晶锭。锭是通过两步法获得的。在第一阶段，通过机械混合进行元素的感应熔化和初步均质化。第二阶段是通过垂直布里奇曼定向结晶技术实现的。进行了X射线相分析，光学和扫描电子显微镜（SEM）观察以及化学分析。据称，钨晶须在铸锭中不规则分布。它们通常形成团块状的聚集体。晶须具有不同的直径和长度。晶须的最小直径为约10-100 nm，最大为几十微米。钨的晶须形成了块状的框架，在其上伸展了p相的膜形式或非平面的椭圆形。

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