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Open AccessArticle

On Long-Term Stability of Metallic Glasses

1
WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
2
MathAM-OIL, National Institute of Advanced Industrial Science and Technology (AIST), Sendai 980-8577, Japan
3
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
*
Author to whom correspondence should be addressed.
Metals 2019, 9(10), 1076; https://doi.org/10.3390/met9101076
Received: 4 September 2019 / Revised: 26 September 2019 / Accepted: 2 October 2019 / Published: 4 October 2019
Thermal stability of different types of metallic glasses and partially crystalline alloys stored for at least 15 years at ambient conditions was tested in the present work by differential scanning calorimetry in comparison with that of the original alloys tested in the as-cast state in the earlier works. The structure of the naturally aged alloys was also studied by X-ray diffractometry. The structure of a couple of selected alloys was also tested by transmission electron microscopy. Most of the alloys retained their initial structure and showed only a moderate decrease in the crystallization temperature. Only those alloys which showed visible surface oxidation (Cu-Zr-system based) were partly transformed into a crystalline state forming micron-scale Cu particles in air at ambient conditions.
Keywords: metallic glass; thermal stability; structure; crystallization metallic glass; thermal stability; structure; crystallization
MDPI and ACS Style

Louzguine-Luzgin, D.V.; Jiang, J. On Long-Term Stability of Metallic Glasses. Metals 2019, 9, 1076.

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