Dislocations and Plastic Deformation in MgO Crystals: A Review

被引：81

作者：

Amodeo, Jonathan ^{[1
]}

Merkel, Sebastien ^{[2
,3
]}

Tromas, Christophe ^{[4
]}

Carrez, Philippe ^{[2
]}

Korte-Kerzel, Sandra ^{[5
]}

Cordier, Patrick ^{[2
]}

Chevalier, Jerome ^{[1
]}

机构：

[1] Univ Lyon, INSA Lyon, CNRS, MATEIS UMR5510, F-69621 Villeurbanne, France

[2] Univ Lille, CNRS, INRA, ENSCL,UMR 8207,UMET Unite Mat & Transformat, F-59000 Lille, France

[3] Inst Univ France, F-75005 Paris, France

[4] Univ Poitiers, Inst Pprime, CNRS, UPR 3346,ENSMA,Dept Phys & Mecan Mat, SP2MI Bd Marie & Pierre Curie BP 30179, F-86962 Futuroscope, France

[5] Rhein Westfal TH Aachen, Inst Phys Met & Met Phys, Kopernikusstr 14, D-52074 Aachen, Germany

来源：

CRYSTALS | 2018年 / 8卷 / 06期

基金：

欧洲研究理事会;

关键词：

MgO; dislocations; mechanical properties; nano-mechanics; multi-scale modeling; extreme conditions; FRACTURE SURFACE ENERGIES; ATOMIC-FORCE MICROSCOPY; HIGH-TEMPERATURE CREEP; PEIERLS-NABARRO MODEL; IN-SITU DEFORMATION; STEADY-STATE CREEP; SINGLE-CRYSTALS; MAGNESIUM-OXIDE; HIGH-PRESSURE; SCREW DISLOCATIONS;

D O I：

10.3390/cryst8060240

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

This review paper focuses on dislocations and plastic deformation in magnesium oxide crystals. MgO is an archetype ionic ceramic with refractory properties which is of interest in several fields of applications such as ceramic materials fabrication, nano-scale engineering and Earth sciences. In its bulk single crystal shape, MgO can deform up to few percent plastic strain due to dislocation plasticity processes that strongly depend on external parameters such as pressure, temperature, strain rate, or crystal size. This review describes how a combined approach of macro-mechanical tests, multi-scale modeling, nano-mechanical tests, and high pressure experiments and simulations have progressively helped to improve our understanding of MgO mechanical behavior and elementary dislocation-based processes under stress.

引用

页数：53

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