Nondestructive, Rapid Identification of Aluminum Nitride and Internal Alumina Scales on a Heat-Resistant Alloy Using Cathodoluminescence

Susumu Imashuku, Wataru Hashimoto, Kazuaki Wagatsuma

研究成果: Article査読

4 被引用数 (Scopus)

抄録

A nondestructive method to rapidly identify AlN precipitates and internal Al2O3 scales on Ni–Cr–Al alloy via cathodoluminescence (CL) analysis is proposed. AlN could be instantly distinguished from Al2O3, Cr2O3, and CrN based on the detection of violet luminescence in CL images. Moreover, an Al2O3 scale beneath a surface Cr2O3 scale with the thickness below 3.2 μm can be rapidly identified based on a peak at 695 nm in the CL spectra of the alloy surface with no requirement for a destructive cross-sectional analysis. The exposure time for the CL images and the acquisition time for the CL spectra were within 1 min. Therefore, CL analysis may provide a rapid, nondestructive, analytical method for identifying AlN precipitates and internal Al2O3 scales in heat-resistant alloys.

本文言語English
ページ(範囲)519-529
ページ数11
ジャーナルOxidation of Metals
96
5-6
DOI
出版ステータスPublished - 2021 12月

ASJC Scopus subject areas

  • 金属および合金
  • 無機化学
  • 材料化学

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