Grain Boundary Structure and Its Mobility
نویسندگان
چکیده
منابع مشابه
The relationship between grain boundary structure, defect mobility, and grain boundary sink efficiency
Nanocrystalline materials have received great attention due to their potential for improved functionality and have been proposed for extreme environments where the interfaces are expected to promote radiation tolerance. However, the precise role of the interfaces in modifying defect behavior is unclear. Using long-time simulations methods, we determine the mobility of defects and defect cluster...
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This brief review describes the major features of grain boundary mobility in metals and current limitations in our theoretical understanding. Although thermally activated exchange of atoms across boundaries provides a basic picture of grain boundary correct to within an order of magnitude, no refinement of this theory is available that accounts for the experimental characteristics of grain mobi...
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Ultra-high purity alumina was sintered in hydrogen at temperatures ranging from 13251 to 20201C. Normal grain growth was maintained in all samples and grain boundary mobilities were measured. The data represent the most complete measure of intrinsic grain boundary mobility for alumina grain growth currently available. There are two orders of magnitude of discrepancy between the calculated and m...
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Grain boundary plane orientation is a profoundly important determinant of character in polycrystalline materials that is not well understood. This work demonstrates how boundary plane orientation fundamental zones, which capture the natural crystallographic symmetries of a grain boundary, can be used to establish structure-property relationships. Using the fundamental zone representation, trend...
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Mechanical and functional properties of materials are strongly dependent on the grain boundaries (GBs) which has different atomic structures due to the disorder in periodicity. The grain boundary structures are also influenced by the dopant and vacancies segregated at GBs, providing the functional properties, which cannot be observed in a perfect crystal. In order to control GB structures to im...
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ژورنال
عنوان ژورنال: Tetsu-to-Hagane
سال: 1984
ISSN: 0021-1575,1883-2954
DOI: 10.2355/tetsutohagane1955.70.15_1819