Phase transformation behavior and pseudoelastic deformation in SrAl2O4

被引：25

作者：

Matsuo, H. ^{[1
]}

Ikeda, K. ^{[2
]}

Hata, S. ^{[2
]}

Nakashima, H. ^{[2
]}

Yamada, H. ^{[3
]}

Xu, C. N. ^{[3
,4
]}

机构：

[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Fukuoka 8168580, Japan

[2] Kyushu Univ, Fac Engn Sci, Fukuoka 8168580, Japan

[3] Natl Inst Adv Ind Sci & Technol, Saga 8410052, Japan

[4] Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷

基金：

日本科学技术振兴机构;

关键词：

Strontium aluminate (SrAl2O4); Martensitic transformation; Pseudoelastic deformation; STRESS-DISTRIBUTION; MECHANOLUMINESCENCE; SUPERELASTICITY; CRYSTALS;

D O I：

10.1016/j.jallcom.2012.04.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Europium-doped strontium aluminate [SrAl2O4:Eu2+] (SAOE) emits green light under an applied mechanical stress in a phenomenon called mechanoluminescence (ML). In order to clarify the relationship between ML and its structure, the microstructure, phase transformation behavior and structural change under a load on SAO ceramics were investigated. The microstructures were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It has been that SAO has a twin structure with three kinds of morphologies. The phase transformation behavior was investigated using differential scanning calorimetric (DSC) measurements and observation of the microstructures. It is indicated that the twin structures are formed by a thermoelastic martensitic transformation from a hexagonal (beta) to a monoclinic (alpha) phase at about 670 degrees C. In addition, the structural change under a load was observed by in situ TEM nanoindentation. It is clarified that pseudoelastic deformation occurred in SAO. These results suggest that ML occurs with rearrangement of variants of a phase. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：S507 / S516

页数：10

共 20 条

[1] Transitions between P21, P63(√3A), and P6322 modifications of SrAl2O4 by in situ high-temperature X-ray and neutron diffraction [J].

Avdeev, Maxim ;

YakovIev, Sergey ;

Yaremchenko, Aleksey A. ;

Kharton, Vladislav V. .

JOURNAL OF SOLID STATE CHEMISTRY, 2007, 180 (12) :3535-3544

[2] Mechanoluminescence induced by elastic deformation of coloured alkali halide crystals using pressure steps [J].

Chandra, B. P. .

JOURNAL OF LUMINESCENCE, 2008, 128 (07) :1217-1224

[3]

Chandra B.P., 2009, RADIAT EFF DEFECT S, V146, P500

[4] Luminescence induced by moving dislocations in crystals [J].

Chandra, BP .

RADIATION EFFECTS AND DEFECTS IN SOLIDS, 1996, 138 (1-2) :119-137

[5] Strain rate sensitivity in superelasticity [J].

Entemeyer, D ;

Patoor, E ;

Eberhardt, A ;

Berveiller, M .

INTERNATIONAL JOURNAL OF PLASTICITY, 2000, 16 (10-11) :1269-1288

[6] Crystal structure of hexagonal SrAl2O4 at 1073 K [J].

Fukuda, K ;

Fukushima, K .

JOURNAL OF SOLID STATE CHEMISTRY, 2005, 178 (09) :2709-2714

[7] Theoretical studies of grain boundaries in covalent materials [J].

Kohyama, M .

MATERIALS CHEMISTRY AND PHYSICS, 1997, 50 (02) :159-165

[8] A novel technique for viewing stress distribution with mechanoluminescence materials [J].

Li, Chenshu ;

Xu, Chao-Nan ;

Yamada, Hiroshi ;

Imai, Yusuke ;

Zhang, Hongwu ;

Zhang, Lin .

HIGH-PERFORMANCE CERAMICS V, PTS 1 AND 2, 2008, 368-372 :1401-+

[9] Characteristics and mechanism of martensite ageing effect in Au-Cd alloys [J].

Murakami, Y ;

Nakajima, Y ;

Otsuka, K ;

Ohba, T ;

Matsuo, R ;

Ohshima, K .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 237 (01) :87-101

[10]

Murakami Y., 1995, J PHYS, VIV

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