翻訳と辞書 Words near each other ・ Segre Olympic Park ・ Segre surface ・ Segredo ・ SegReg ・ Segreganset River ・ Segregara ・ Segregate (taxonomy) ・ Segregated account ・ Segregated fund ・ Segregated portfolio company ・ Segregated prom ・ Segregating site ・ Segregation ・ Segregation academy ・ Segregation in concrete ・ Segregation in materials ・ Segregation in Northern Ireland ・ Segregation in Seattle ・ Segregationist (short story) ・ Segrelles Museum ・ Segression ・ Segretissimo ・ Segrik ・ Segrià ・ Segro ・ Segrois ・ Segrosome ・ Segré ・ Segré, Burkina Faso ・ Segré–Silberberg effect Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Segregation in materials ： ウィキペディア英語版 Segregation in materials Segregation in materials refers to the enrichment of a material constituent at a free surface or an internal interface of a material. In a polycrystalline solid, a segregation site can be a dislocation, grain boundary, stacking fault, or an interface with a precipitate or secondary phase within the solid. There are two recognized types of segregation: equilibrium segregation and non-equilibrium segregation. == History == Equilibrium segregation is associated with the lattice disorder at interfaces, where thre are sites of energy different from those within the lattice at which the solute atoms can deposit themselves. The equilibrium segregation is so termed because the solute atoms segregate themselves to the interface or surface in accordance with the statistics of thermodynamics in order to minimize the overall free energy of the system. This sort of partitioning of solute atoms between the grain boundary and the lattice was predicted by McLean in 1957 (). Non-equilibrium segregation, first theorized by Westbrook in 1964 (), occurs as a result of solutes coupling to vacancies which are moving to grain boundary sources or sinks during quenching or application of stress. It can also occur as a result of solute pile-up at a moving interface (). There are two main features of non-equilibrium segregation, by which it is most easily distinguished from equilibrium segregation. In the non-equilibrium effect, the magnitude of the segregation increases with increasing temperature and the alloy can be homogenized without further quenching because its lowest energy state corresponds to a uniform solute distribution. In contrast, the equilibrium segregated state, by definition, is the lowest energy state in a system that exhibits equilibrium segregation, and the extent of the segregation effect decreases with increasing temperature. The details of non-equilibrium segregation are not going to be discussed here, but can be found in the review by Harries and Marwick (). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Segregation in materials」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.