Photothermal microscopy: thermal contrast at grain interface in sintered metallic materials

A. M. Mansanares, T. Velinov, Z. Bozóki, D. Fournier, A. C. Boccara

Research output: Contribution to journalArticle

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Abstract

The photothermal signal detected by the photothermal microscope (mono-cell) is theoretically analyzed in the study of the vertical and slanted thermal barriers. Equations for the vertical barriers were derived and the contrast and width of the signal were calculated. Finite element methods were used for the slanted barriers. An experiment is also performed to validate the theory. Photothermal microscope is applied to study the grain interfaces in sintered samples of iron. The photothermal signal (thermal contrast) was studied as a function of the optical contrast of the interfaces. It was observed that for small optical contrast the thermal barrier model correlated well with the experimental results. If optical differences exist the model varies with the results and a thick interface model is needed.

Original languageEnglish
Pages (from-to)3344-3350
Number of pages7
JournalJournal of Applied Physics
Volume75
Issue number7
DOIs
Publication statusPublished - Apr 1 1994

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microscopy
microscopes
finite element method
iron
cells

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Photothermal microscopy : thermal contrast at grain interface in sintered metallic materials. / Mansanares, A. M.; Velinov, T.; Bozóki, Z.; Fournier, D.; Boccara, A. C.

In: Journal of Applied Physics, Vol. 75, No. 7, 01.04.1994, p. 3344-3350.

Research output: Contribution to journalArticle

Mansanares, A. M. ; Velinov, T. ; Bozóki, Z. ; Fournier, D. ; Boccara, A. C. / Photothermal microscopy : thermal contrast at grain interface in sintered metallic materials. In: Journal of Applied Physics. 1994 ; Vol. 75, No. 7. pp. 3344-3350.
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