On the Liquid/Solid Phase Equilibria in the Al-Rich Corner of the Al-Si-Ti Ternary System

被引：32

作者：

Dezellus, O. ^{[1
]}

Gardiola, B. ^{[1
]}

Andrieux, J. ^{[1
]}

Lomello-Tafin, M. ^{[2
]}

Viala, J. C. ^{[1
]}

机构：

[1] Univ Lyon 1, UMR CNRS 5615, Lab Multimat & Interfaces, F-69100 Villeurbanne, France

[2] Univ Savoie, Lab SYMME, Polytech Annecy Chambery, F-74940 Annecy Le Vieux, France

来源：

JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2014年 / 35卷 / 02期

关键词：

aluminum alloys; differential scanning calorimetry (DSC); invariant point; isopleth; isotherm; liquidus surface; ternary system; GRAIN-REFINEMENT; ALUMINUM-ALLOYS; BINARY-SYSTEM; SOLIDIFICATION; MECHANISM; TIAL3;

D O I：

10.1007/s11669-014-0282-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The nature of liquid-solid phase equilibria in the Al-rich corner of the Al-Si-Ti system are determined by drawing three isothermal sections at 620, 680 and 727 A degrees C. The solubility of Ti in Al-Si liquids is determined for four different compositions (0, 9, 13 and 18 at.%Si) at temperature below 800 A degrees C. Combination of the two sets of experimental results leads to an attempt of liquidus projection. The primary crystallization surface of Al3Ti is found to extend up to 9.5 at.%Si in the liquid phase at 620 A degrees C and 11 at.%Si at 727 A degrees C. The solubility of Ti is found to be not significantly dependent on the Si content of the liquid. From DSC measurements and deduction on microstructure, the last invariant reaction of the solidification path is found to be quasi-peritectic: L + tau(1) - Ti7Al5Si12 double left right arrow Al + Si

引用

页码：137 / 145

页数：9

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