Phase-field modelling of spinodal decomposition in TiAlN including the effect of metal vacancies

被引：40

作者：

Gronhagen, K. ^{[1
]}

Agren, J. ^{[2
]}

Oden, M. ^{[1
]}

机构：

[1] Linkoping Univ, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden

[2] Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden

来源：

SCRIPTA MATERIALIA | 2015年 / 95卷

基金：

瑞典研究理事会;

关键词：

Phase-field model; Spinodal decomposition; Vacancies; TiAlN; PERFORMANCE; COATINGS; FILMS;

D O I：

10.1016/j.scriptamat.2014.09.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Using a CALPHAD approach together with a Cahn-Hilliard model, we describe the microstructure evolution in cubic Ti1-xAlxN including vacancies on the metal sublattice. Our results show that vacancy content has a pronounced effect on the decomposition kinetics. Furthermore, vacancies show a strong tendency to segregate to the coherent AlN-TiN interface regions. We illustrate how vacancies anneal to grain boundaries, and finally, we compare our prediction to experimental differential scanning calorimetry data and attribute the second peak in the thermogram to vacancy depletion. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：42 / 45

页数：4

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