Latent Order in High-Angle Grain Boundary of GaN
نویسندگان
چکیده
منابع مشابه
Grain boundary order-disorder transitions
The conditions for grain boundary (GB) structural transitions are determined from a diffuse interface model that incorporates structural disorder and crystallographic orientation. A graphical construction and numerical calculations illustrate the existence of a first-order GB order–disorder transition below the bulk melting point. When thermodynamic conditions permit their existence, disordered...
متن کاملModeling of resistance curve of high-angle grain boundary in Fe–3 wt.% Si alloy
When a propagating cleavage front encounters a high-angle grain boundary it first penetrates through the grain boundary stably. With increasing penetration depth the resistance of the grain boundary rises, resulting in the well-known R-curve. When the balance between the rates of the energy release rate and the grain boundary resistance is reached, the crack advance becomes unstable and the gra...
متن کاملCharacteristic length scale in cleavage cracking across high-angle grain boundary
The factors that govern cleavage cracking across high-angle grain boundaries are investigated theoretically. According to previous experimental observations, a cleavage front overcomes the resistance of a high-angle grain boundary by first penetrating across it at a number of break-through points (BTP) and then separating apart persistent grain-boundary islands (PGBI). In the current study, thi...
متن کاملResistance to cleavage cracking and subsequent shearing of high-angle grain boundary
In a previous experimental study, it was observed that the break-through process of a cleavage front across a high-angle grain boundary can be highly nonuniform. While the central part of the boundary can be cleaved quite smoothly, the rest parts must be sheared apart. In this paper, the trapping effect of grain boundary shearing is analyzed in considerable detail. Before the shearing is comple...
متن کاملMixed-mode cleavage front branching at a high-angle grain boundary
In a previous study it was observed that a cleavage front can penetrate through a high-angle grain boundary in either regular or irregular mode. In this article, we report the third mode, which has a self-similar characteristic. In this mode, the cleavage front branches into a number of segments and the breakthrough points are in clusters, which can be regarded as the combination of regular and...
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: Scientific Reports
سال: 2018
ISSN: 2045-2322
DOI: 10.1038/s41598-018-22603-3