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TiAlN的相稳定性与弹性

Phase Stability and Elasticity of TiAlN.

作者信息

Abrikosov Igor A, Knutsson Axel, Alling Björn, Tasnádi Ferenc, Lind Hans, Hultman Lars, Odén Magnus

机构信息

Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping 58183, Sweden.

出版信息

Materials (Basel). 2011 Sep 15;4(9):1599-1618. doi: 10.3390/ma4091599.

DOI:10.3390/ma4091599
PMID:28824159
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5448856/
Abstract

We review results of recent combined theoretical and experimental studies of TiAlN, an archetypical alloy system material for hard-coating applications. Theoretical simulations of lattice parameters, mixing enthalpies, and elastic properties are presented. Calculated phase diagrams at ambient pressure, as well as at pressure of 10 GPa, show a wide miscibility gap and broad region of compositions and temperatures where the spinodal decomposition takes place. The strong dependence of the elastic properties and sound wave anisotropy on the Al-content offers detailed understanding of the spinodal decomposition and age hardening in TiAlN alloy films and multilayers. TiAlN/TiN multilayers can further improve the hardness and thermal stability compared to TiAlN since they offer means to influence the kinetics of the favorable spinodal decomposition and suppress the detrimental transformation to w-AlN. Here, we show that a 100 degree improvement in terms of w-AlN suppression can be achieved, which is of importance when the coating is used as a protective coating on metal cutting inserts.

摘要

我们回顾了近期对TiAlN（一种用于硬涂层应用的典型合金系统材料）进行的理论与实验相结合的研究结果。文中给出了晶格参数、混合焓和弹性性能的理论模拟。计算得到的常压以及10 GPa压力下的相图显示出较宽的混溶间隙以及发生旋节分解的成分和温度的宽广区域。弹性性能和声波各向异性对铝含量的强烈依赖性为理解TiAlN合金薄膜和多层膜中的旋节分解和时效硬化提供了详细依据。与TiAlN相比，TiAlN/TiN多层膜可以进一步提高硬度和热稳定性，因为它们提供了影响有利的旋节分解动力学并抑制向w-AlN有害转变的方法。在此，我们表明在抑制w-AlN方面可以实现100度的提升，这在涂层用作金属切削刀片的保护涂层时具有重要意义。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ae/5448856/f6eeecd500a9/materials-04-01599-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ae/5448856/f6eeecd500a9/materials-04-01599-g009.jpg
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