Phase transformation behavior and pseudoelastic deformation in SrAl 2O4

H. Matsuo, K. Ikeda, Satoshi Hata, Hideharu Nakashima, H. Yamada, C. N. Xu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Europium-doped strontium aluminate [SrAl2O4:Eu 2+] (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 (β) to a monoclinic (α) phase at about 670 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 α phase. Crown

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume577
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Nov 15 2013

Fingerprint

Triboluminescence
Phase transitions
Microstructure
Europium
Transmission electron microscopy
Methyl Green
Strontium
Martensitic transformations
Nanoindentation
Scanning
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Phase transformation behavior and pseudoelastic deformation in SrAl 2O4. / Matsuo, H.; Ikeda, K.; Hata, Satoshi; Nakashima, Hideharu; Yamada, H.; Xu, C. N.

In: Journal of Alloys and Compounds, Vol. 577, No. SUPPL. 1, 15.11.2013.

Research output: Contribution to journalArticle

@article{81f9236fc65640c99b1edeb65146406b,
title = "Phase transformation behavior and pseudoelastic deformation in SrAl 2O4",
abstract = "Europium-doped strontium aluminate [SrAl2O4:Eu 2+] (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 (β) to a monoclinic (α) phase at about 670 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 α phase. Crown",
author = "H. Matsuo and K. Ikeda and Satoshi Hata and Hideharu Nakashima and H. Yamada and Xu, {C. N.}",
year = "2013",
month = "11",
day = "15",
doi = "10.1016/j.jallcom.2012.04.009",
language = "English",
volume = "577",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
number = "SUPPL. 1",

}

TY - JOUR

T1 - Phase transformation behavior and pseudoelastic deformation in SrAl 2O4

AU - Matsuo, H.

AU - Ikeda, K.

AU - Hata, Satoshi

AU - Nakashima, Hideharu

AU - Yamada, H.

AU - Xu, C. N.

PY - 2013/11/15

Y1 - 2013/11/15

N2 - Europium-doped strontium aluminate [SrAl2O4:Eu 2+] (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 (β) to a monoclinic (α) phase at about 670 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 α phase. Crown

AB - Europium-doped strontium aluminate [SrAl2O4:Eu 2+] (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 (β) to a monoclinic (α) phase at about 670 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 α phase. Crown

UR - http://www.scopus.com/inward/record.url?scp=84891624000&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84891624000&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2012.04.009

DO - 10.1016/j.jallcom.2012.04.009

M3 - Article

VL - 577

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - SUPPL. 1

ER -