The nanostructure and mechanical properties of nanocomposite Nbx-CoCrCuFeNi thin films

被引：31
|
作者：
Braeckman, B. R. [1 ]
Misjak, F. [2 ]
Radnoczi, G. [2 ]
Caplovicova, M. [3 ]
Djemia, P. H. [4 ]
Tetard, F. [4 ]
Belliard, L. [5 ]
Depla, D. [1 ]
机构：
[1] Univ Ghent, Dept Solid State Sci, Krijgslaan 281 S1, B-9000 Ghent, Belgium
[2] Hungarian Acad Sci, Ctr Energy Res, POB 49, H-1525 Budapest, Hungary
[3] Slovak Univ Technol Bratislava, Univ Sci Pk Bratislava Ctr, TU Ctr Nanodiagnost, Vazovova 5, Bratislava 81243, Slovakia
[4] Univ Paris 13, Sorbonne Paris Cite, CNRS, Lab Sci Proc & Mat LSPM,UPR 3407, 99 Ave JB Clement, F-93430 Villetaneuse, France
[5] UPMC, Inst NanoSci Paris, UMR 7588, 4 Pl Jussieu, F-75252 Paris 05, France
来源：
SCRIPTA MATERIALIA | 2017年 / 139卷
关键词：
Sputtering; Thin films; Nanocomposites; High-entropy alloys; NANOCRYSTALLINE AL; IMPURITIES; BEHAVIOR; STRESS; DEFORMATION; GROWTH;
D O I：
10.1016/j.scriptamat.2017.06.046
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The relation between the nanostructure and the mechanical properties of Nb-x-CoCrCuFeNi high entropy alloy thin films was explored. With increasing Nb concentration (0 to 24 at.% Nb), a transition from a single phase face-centered cubic solid solution to an amorphous phase is observed. At intermediary Nb fractions (5 to 15 at.% Nb) a nanocomposite structure is formed that consists of nanosized crystallites embedded in an amorphous matrix. The nanocomposite structure leads to an increase in hardness beyond the Hall-Petch breakdown. The shear and Young's moduli decrease with increasing Nb concentration, which is beneficial for the alloy ductility. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved,
引用
收藏
页码：155 / 158
页数：4
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