Correlation between the local stress and the grain misorientation in the polycrystalline Al2O3 measured by near-field luminescence spectroscopy

Toru Tomimatsu, Ryo Takigawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Owing to its high spatial resolution, near-field spectroscopy is a useful method for sensing the stress in a narrow region of submicron order. Here, on the basis of the highly resolved images obtained by near-field luminescence spectroscopy, we propose a statistical method of analyzing grain anisotropy-induced stress in polycrystalline Al2O3. We focus on two characteristics of a spectra: the intensity ratio and peak shift of luminescence of two lines (R1 and R2) from Al2O3 to discuss crystal orientation and stress, respectively. By incorporating the concept of the crystal misorientation parameter using intensity ratio, an apparent correlation between the magnitude of stress and the misorientation is found. This correlation analysis provides an important insight for the investigation of local thermal stress in Al2O3.

Original languageEnglish
Article number06HF01
JournalJapanese journal of applied physics
Volume57
Issue number6
DOIs
Publication statusPublished - 2018 Jun

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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