Characterization of oxide layers developed on ZrCuAl-based bulk metallic glasses during gaseous thermochemical treatment

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Abstract

The current study addresses an investigation of low-temperature oxidizing treatment (case formed in the metallic glassy substrate was further investigated with in-situ ion beam channeling. The results demonstrate that after conducting the oxidizing treatment in the atmosphere containing high oxygen partial pressure, an outer oxidation layer and an inner oxide zone develop. In the gas with a low oxygen partial pressure only the inner oxidation zone results. Interestingly, four oxide regions with different chemical composition, which mainly consist of ZrO2 (with two different lattice structures; tetragonal and monoclinic) and Al2O3 are present in the inner layer where the oxygen is distributed through the substrate. Furthermore, the outer oxide layer is enriched in copper which has diffused out of the BMG. Cracks have developed adjacent to the surface, which is ascribed to the stresses resulting from oxide formation in the inner oxidation zone. Some of the cracks are filled out with copper. This phenomenon was also observed in Ag-containing BMG, where both copper and silver enrich at the surface.
Original languageEnglish
Publication date2018
Number of pages1
Publication statusPublished - 2018
Event25th International Symposium nn Metastable, Amorphous and Nanostructured Materials (ISMANAM 2018) - Rome, Italy
Duration: 2 Jun 20186 Jun 2018

Conference

Conference25th International Symposium nn Metastable, Amorphous and Nanostructured Materials (ISMANAM 2018)
CountryItaly
CityRome
Period02/06/201806/06/2018

Cite this

Haratian, S., Villa, M., Grumsen, F. B., Christiansen, T. L., & Somers, M. A. J. (2018). Characterization of oxide layers developed on ZrCuAl-based bulk metallic glasses during gaseous thermochemical treatment. Abstract from 25th International Symposium nn Metastable, Amorphous and Nanostructured Materials (ISMANAM 2018), Rome, Italy.