Investigation of the Al–Cr γ-range

详细信息	查看全文 | 推荐本文 |

• 作者：B. Grushko ; E. Kowalska-Strzę ; ciwilk ; B. Przepió ; rzyń ; ski and M. Surowiec
• 刊名：Journal of Alloys and Compounds
• 出版年：2005
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：2005
• 卷：402
• 期：1-2
• 页码：98-104
• 文件大小：359 K

摘要

The range of Al–Cr between 25 and 50 at.%Cr was reinvestigated by powder X-ray diffractometry, differential thermal analysis, scanning and transmission electron microscopy. Experiments point to the existence of only one high-temperature and one low-temperature phase extending in the compositional range between about 30 and 42 at.%Cr. The low-temperature phase (γ₂) has a rhombohedrally distorted γ-brass structure with α < 90° continuously varying with the composition. This phase exhibited twin-oriented domains, which, in turn, consisted of the second-order twins. At 36 at.%Cr and below very fine and periodically arranged stripes were formed, which resulted in additional reflections in the corresponding electron diffraction patterns.