Surface characterization of functional iron–gallium alloys annealed under different conditions
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- Toru Kawamata
- Institute for Materials Research Tohoku University Sendai Japan
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- Kozo Shinoda
- Institute of Multidisciplinary Research for Advanced Materials Tohoku University Sendai Japan
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- Kazumasa Sugiyama
- Institute for Materials Research Tohoku University Sendai Japan
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- Shigeru Suzuki
- Micro System Integration Center Tohoku University Sendai Japan
Abstract
<jats:p>Fe–Ga alloys are functional magnetostrictive materials, which are promising for application in actuators and sensors. Because surface properties of these alloys such as corrosion resistance are important in technological applications, it is required to characterize the chemical composition and state of the surface of these alloys, which depend on annealing conditions. In this study, X‐ray absorption spectroscopy (XAS) and secondary ion mass spectrometry (SIMS) were used to characterize surface layers formed on the Fe–Ga alloys annealed under different atmospheric conditions. The XAS spectra of the annealed sample showed that the amount of gallium in the surface layers increased due to annealing, whereas the XAS spectra of the as‐polished alloys revealed that the amounts of iron and gallium arise from the bulk composition. The XAS spectra of the alloys annealed in argon–hydrogen with residual oxygen showed that gallium is increased for its preferential oxidation. SIMS depth profile also showed the enrichment of gallium on the surface and the inhomogeneous distribution of iron on the surface layers.</jats:p>
Journal
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- Surface and Interface Analysis
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Surface and Interface Analysis 52 (12), 1098-1103, 2020-06-17
Wiley
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Keywords
Details 詳細情報について
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- CRID
- 1360576118692477952
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- DOI
- 10.1002/sia.6841
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- ISSN
- 10969918
- 01422421
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- Data Source
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- Crossref
- KAKEN