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| 概要 |
TTT curves for crystallization on super-cooled liquid were calculated by the equations of isothermal crystallized velocity, nucleated velocity and crystal growth velocity, and compared these TTT curve...s with experimental results. It is possible to suppose the TTT curve theoretically, however experimental results can not be satisfactory explained by this theory, for this theory includes some suppositions. It is nessesary to modify this theory by experimental results. The critical cooling rate R_c for glass forming and the liquidus viscosity η_L were measured for some systems and discussed between log R_c vs. logη_L. Log R_c vs. logη_L diagram had approximately the relationship of a straight line. On the other hand, the relationship of log R_c and logη_L was calculated by the equation of crystallized on cooling process from molten state. From this theoretical study, the gradient of log R_c and logη_L was ideally minus one. However, the gradient of experimental results didn't agree with minus one. We think that the disagreement occures from stokes's law, and a coefficient of correction ^α was introduced in the law. In consequence, log R_c vs. logη_L diagram can be explained by a straight line included all systems.続きを見る
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Mendeley出力
