Phase transformation behavior and pseudoelastic deformation in SrAl 2O4

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

研究成果: ジャーナルへの寄稿記事

9 引用 (Scopus)

抄録

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

元の言語英語
ジャーナルJournal of Alloys and Compounds
577
発行部数SUPPL. 1
DOI
出版物ステータス出版済み - 11 15 2013

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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

これを引用

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

:: Journal of Alloys and Compounds, 巻 577, 番号 SUPPL. 1, 15.11.2013.

研究成果: ジャーナルへの寄稿記事

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AU - Ikeda, K.

AU - Hata, Satoshi

AU - Nakashima, Hideharu

AU - Yamada, H.

AU - Xu, C. N.

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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

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