Advanced transmission electron microscopy study on premartensitic state of Ti50Ni48Fe2
Advanced transmission electron microscopy study on premartensitic state of Ti50Ni48Fe2
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Ti50Ni48Fe2 预马氏体状态的先进透射电子显微镜研究
DOI：
10.1016/s1468-6996(00)00008-5
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发表时间：
2000
影响因子：
5.5
通讯作者：
Y. Murakami
中科院分区：
文献类型：
--
作者：
D. Shindo;Y. Murakami
采用先进的透射电子显微镜，利用能量过滤和原位暗场成像技术，对Ti50Ni48Fe2预马氏体态的显微结构进行了广泛的分析。从能量过滤的电子衍射研究，小于5 nm的横向原子位移的微畴被澄清，优选地在（110 l）方向上延伸。仔细的能量过滤暗场电子显微镜显示，每个微区具有单一的横向类型的原子位移，其传播和位移方向分别为[011]和[]方向。此外，从原位暗场电子显微镜，微畴的生长过程中动态观察到的第一次。根据晶格应变讨论了微区的尺寸限制，而没有伴随横向原子位移的平移对称性。© 2000 Elsevier Science Ltd.保留所有权利。
Microstructure of the premartensitic state in Ti50Ni48Fe2 is extensively analyzed by advanced transmission electron microscopy utilizing energy filtering and in situ dark-field imaging. From the energy-filtered electron diffraction study, microdomains less than 5 nm with transverse atomic displacement are clarified to extend preferably in the (110l) directions. Careful energy-filtered dark-field electron microscopy reveals that each microdomain has a single transverse type of atomic displacement whose propagation and displacement directions are such as the [011] and [] directions, respectively. Furthermore, from in situ dark-field electron microscopy, the growth process of the microdomains is observed dynamically for the first time. Size limitation of the microdomains is discussed in terms of the lattice strain without the translational symmetry accompanying the transverse atomic displacement.© 2000 Elsevier Science Ltd. All rights reserved.