Mechanical properties of magnetite (Fe3O4), hematite (α-Fe2O3) and goethite (α-FeO•OH) by instrumented indentation and molecular dynamics analysis

被引：171

作者：

Chicot, D. ^{[1
,2
]}

Mendoza, J. ^{[1
,2
]}

Zaoui, A. ^{[1
,3
]}

Louis, G. ^{[1
,4
]}

Lepingle, V. ^{[1
,4
]}

Roudet, F. ^{[1
,2
]}

Lesage, J. ^{[1
,2
]}

机构：

[1] Univ Lille Nord France, F-59000 Lille, France

[2] LML, USTL, F-59650 Villeneuve Dascq, France

[3] Polytech Lille, LGCgE Lille1, F-59650 Villeneuve Dascq, France

[4] MPE GCE, EMDouai, F-59500 Douai, France

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 129卷 / 03期

关键词：

Pure and complex oxides; Bulk modulus; Hardness; Instrumented indentation; Molecular dynamic analysis; STRAIN GRADIENT PLASTICITY; HIGH-PRESSURE; SYNCHROTRON-RADIATION; TEMPERATURE OXIDATION; SUPERHARD MATERIALS; SINGLE-CRYSTALS; X-RAY; NANOINDENTATION; HARDNESS; BEHAVIOR;

D O I：

10.1016/j.matchemphys.2011.05.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hardness and elastic properties of pure (crystal) and complex (product of corrosion) iron oxides, magnetite (Fe3O4), hematite (alpha-Fe2O3 ) and goethite (alpha-FeO center dot OH), were determined by means of molecular dynamics analysis (MDA) and instrumented indentation. To determine local mechanical properties by indentation, multicyclic loading is performed by using incremental mode. Moreover to study the influence of visco-elastoplastic behaviour of the material, various load-dwell-times were applied at each loading/unloading cycle. To support the indentation results, molecular dynamics analysis based on shell model potential is performed for pure oxides to determine Young's modulus, bulk modulus, Poisson's ratio and shear modulus. The comparison between experimental and theoretical values both with the literature data allows the evaluation of the mechanical properties of the pure oxides. Subsequently, this allows the validation of the mechanical properties of complex oxides which can only be deduced from indentation experiments. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：862 / 870

页数：9

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