Effects of structure and interfaces on fracture toughness of CrN/AlN multilayer coatings

被引：80
作者：
Schloegl, M. [1 ,2 ]
Kirchlechner, C. [3 ,4 ]
Paulitsch, J. [2 ]
Keckes, J. [3 ,4 ,5 ]
Mayrhofer, P. H. [2 ]
机构：
[1] Univ Leoben, Dept Phys Met & Mat Testing, A-8700 Leoben, Austria
[2] Vienna Univ Technol, Inst Mat Sci & Technol, A-1040 Vienna, Austria
[3] Univ Leoben, Dept Mat Phys, A-8700 Leoben, Austria
[4] Univ Leoben, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria
[5] Leoben Forsch GmbH, Mat Ctr, A-8700 Leoben, Austria
来源：
SCRIPTA MATERIALIA | 2013年 / 68卷 / 12期
基金：
奥地利科学基金会;
关键词：
Sputtering; CrN/AlN multilayers; Fracture; Crack; Coating; THERMAL BARRIER COATINGS; MECHANICAL-PROPERTIES; THIN-FILMS; MICROSTRUCTURE; STABILITY;
D O I：
10.1016/j.scriptamat.2013.01.039
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In situ scanning electron microscopy compression tests clearly demonstrate that a multilayered arrangement of CrN and AlN when stabilized by coherency strains to its cubic metastable phase for AlN layer thicknesses below 3 nm - exhibits increased fracture toughness as compared to single-layered CrN. This allows increasing the maximum loading from similar to 5.25 to 6.80 GPa. If the AlN layers mainly crystallize in their stable wurtzite structure - for thicknesses above 3 nm spontaneous and fatal cracking occurs under loads as small as 3.80 GPa. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：917 / 920
页数：4
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