Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries
نویسندگان
چکیده
منابع مشابه
Diffraction Studies of the Atomic Structure of Grain Boundaries
The recent results of the application of diffraction techniques to study the atomic structure of grain boundaries are reviewed. The outcome of the first determination of a grain boundary structure using diffraction information alone is examined. The influence of a particular metal on the grain boundary structure is examined. The variation of grain boundary structural width with parameters such ...
متن کاملHard Sphere Models for the Structure of Grain Boundaries
Hard sphere models have been constructed for symmetric tilt and twist boundaries between f.c.c. crystals, and the sizes of the interstitial and substitutional sites have been calculated. Comparison to boundary structures obtained by computer relaxation nethods, and consideration of the possible importance of impurity atoms at the boundary, show that hard sphere mode ling may be a useful first a...
متن کاملAtomic Structure of Grain Boundaries and Intergranular Segregation
— Some Important aspects of the atomic structure of grain boundaries in pure metals, in particular the structural model of general grain boundaries and the multiplicity of structures, are discussed first. An empirical scheme for the desciption of atomic interactions in alloys is then outlined. General, structure independent, properties of segregation are examined in the framework of this scheme...
متن کاملPredicting structure and energy of dislocations and grain boundaries
A microscopic phase field (MPF) model is formulated to describe quantitatively the core structure and energy of dislocations using ab initio data as input. Based on phase field microelasticity theory implemented in the slip plane using Green’s function to describe the longrange elastic interaction, the MPF model is a three-dimensional generalization of the Peierls model. Using the same generali...
متن کاملOn the structure of grain/interphase boundaries and interfaces
Grain/interphase boundaries/interfaces of varying misorientations, free volume fractions, curvatures and irregularities are present in materials, both 3D and 2D, regardless of whether these materials are crystalline or amorphous/glassy. Therefore, a question arises about the central idea on which a general description of grain/interphase boundaries/interfaces can and should be based. It is sugg...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2002
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.1456969