材料科学
热稳定性
纤锌矿晶体结构
外延
热的
接口(物质)
结晶学
复合材料
化学工程
冶金
热力学
图层(电子)
化学
物理
毛细管数
锌
毛细管作用
工程类
作者
Jian Du,Jie Zhang,Li Chen,Zhe R. Liu,Fei Pei,Yi Kong
标识
DOI:10.1021/acsami.3c12885
摘要
Recently, the TiAlSiN/TiAlN coatings with excellent mechanical and thermal properties have great potential for protective applications that face deteriorated service environments. Here, we systematically investigate the interface structure, mechanical properties, and thermal stability of TiAlSiN/TiAlN multilayers with varied Al and Si contents of TiAlSiN sublayer. Both Ti0.53Al0.38Si0.09N/Ti0.52Al0.48N (ML_1) and Ti0.48Al0.38Si0.14N/Ti0.52Al0.48N (ML_2) exhibit the face-centered cubic structure through epitaxial growth, whereas the Ti0.43Al0.48Si0.09N/Ti0.52Al0.48N (ML_3) shows a mixed cubic/wurtzite (c/w) structure. This mechanism is explored by first-principles calculations that the increased content of Al and Si within the TiAlSiN sublayer is detrimental to the formation of a coherent interface. Meanwhile, the change of interfacial structure leads to a variation in hardness from ∼35.6 GPa of ML_1 to ∼35.4 GPa of ML_2 and then to ∼30.9 GPa of ML_3. In addition, ML_1 presents a delayed thermal decomposition by ∼100 °C, compared to those of ML_2 and ML_3 multilayers.
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