Invar effect of Fe-based bulk metallic glasses
| Autor: | D. P. Lu, Q. Hu, J. Z. Zou, X. R. Zeng, Yuqiang Yan, S. S. Chen, Sheng Guo, J. M. Wang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Work (thermodynamics) Amorphous metal Materials science Condensed matter physics Mechanical Engineering Metallurgy Metals and Alloys 02 engineering and technology General Chemistry Atmospheric temperature range engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Thermal expansion Amorphous solid Mechanics of Materials 0103 physical sciences Materials Chemistry engineering Curie temperature Fe based 0210 nano-technology Invar |
| Zdroj: | Intermetallics. 93:318-322 |
| ISSN: | 0966-9795 |
| Popis: | Invar alloys have a wide application owing to its low expansion characteristics. Recently, it is revealed that some Fe-based bulk metallic glasses (BMGs), which have much higher strength than that of traditional Fe-Ni Invar alloys, also have the Invar effect. Combining the low expansion of the Invar effect and the good mechanical properties of Fe-based BMGs has an attractive potential for applications, for which firstly systematic study on the Invar effect of Fe-based BMGs is needed. In this work, the thermal expansion of 14 FeSiPCBM, (Fe,Co)BSiNb, FeNiPC and FeMoPCB BMGs are investigated. The results show all the alloys have the Invar effect, but can be categorized in two types, depending on whether the low expansion occurs in a wide temperature range below the Curie temperature Tc, or in a narrow temperature range near Tc. It is found the former type of alloys have lower Tc and saturation magnetic induction density, i.e., weaker magnetic properties. The substitution of Fe by Co and Ni weakens the Invar effect. These findings are explained based on the characteristics of the amorphous structure and the Bethe-Slater curve. The findings in this paper help to further develop low expansion Fe-based BMGs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect