Assessment of the Ti-Rich Corner of the Ti-Si Phase Diagram: The Recent Dispute About the Eutectoid Reaction
Assessment of the Ti-Rich Corner of the Ti-Si Phase Diagram: The Recent Dispute About the Eutectoid Reaction
复制标题
Ti-Si 相图富钛角的评估：关于共析反应的最新争议
DOI：
10.1590/1980-5373-mr-2016-0157
复制
发表时间：
2016
影响因子：
1.7
通讯作者：
C. Azevedo
中科院分区：
文献类型：
--
作者：
M. Fiore;F. Neto;C. Azevedo
Ti-Si-X系统的热力学优化要求其各自的二元系统不断更新。自20世纪50年代以来，Ti-Si系统已经被实验研究，并且这些关键的实验数据可以用于使用热力学模型计算Ti-Si相图。1998年对Ti-Si系统进行了最新的评估，结果表明存在化学计量的Ti 3Si作为稳定相。针对Ti-Si系和Ti-X-Si系共析反应中Ti 3Si相稳定性的争议，对“稳定”（以Ti 3Si相为特征）和“亚稳”（以Ti 5Si 3相为特征）Ti-Si相图中的富Ti角进行了评价。的相边界，最小二乘法的优化程序和相对标准偏差的计算变量的评估图的误差值，和以前的调查进行了讨论，以激发进一步的实验工作的共析反应的Ti-Si相图。
The thermodynamic optimization of Ti-Si-X systems requires that their respective binary systems are constantly updated. The Ti-Si system has been experimentally investigated since the 1950s and these critical experimental data can be employed to calculate the Ti-Si phase diagram using thermodynamic modeling. The most recent assessment of the Ti-Si system was performed in 1998, showing the presence of stoichiometric Ti3Si as stable phase. In the light of the dispute over the stability of Ti3Si phase in the eutectoid reaction of the Ti-Si and Ti-X-Si systems, the present work assessed the Ti-rich corner of the "stable" (featuring Ti3Si phase) and "metastable" (featuring Ti5Si3 phase) Ti-Si phase diagrams. The phase boundaries, the values of the error of the least-square method of the optimization procedure and the relative standard deviation of the calculated variables of the assessed diagrams; and previous investigations were discussed in order to inspire further experimental work on the eutectoid reaction of the Ti-Si phase diagram.