Classification of Bulk Metallic Glasses by Atomic Size Difference, Heat of Mixing and Period of Constituent Elements and Its Application to Characterization of the Main Alloying Element
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- 1 January 2005
- journal article
- Published by Japan Institute of Metals in MATERIALS TRANSACTIONS
- Vol. 46 (12), 2817-2829
- https://doi.org/10.2320/matertrans.46.2817
Abstract
Bulk metallic glasses (BMGs) have been classified according to the atomic size difference, heat of mixing (ΔHmix) and period of the constituent elements in the periodic table. The BMGs discovered to date are classified into seven groups on the basis of a previous result by Inoue. The seven groups are as follows: (G-I) ETM/Ln-LTM/BM-Al/Ga, (G-II) ETM/Ln-LTM/BM-Metalloid, (G-III) Al/Ga-LTM/BM-Metalloid, (G-IV) IIA-ETM/Ln-LTM/BM, (G-V) LTM/BM-Metalloid, (G-VI) ETM/Ln-LTM/BM and (G-VII) IIA-LTM/BM, where ETM, Ln, LTM, BM and IIA refer to early transition, lanthanide, late transition, group IIIB–IVB and group IIA-group metals, respectively. The main alloying element of ternary G-I, G-V and G-VII, ternary G-II and G-IV, and ternary G-VI BMGs is the largest, intermediate and smallest atomic radius compared to the other alloying elements, respectively. The main alloying element of ternary BMGs belonging to G-I, G-V, G-VI and G-VII is an element in the atomic pair with the largest and negative value of ΔHmix (ΔHL.N.mix), while the main element of ternary BMGs belonging to G-II and G-IV is independent of the atomic pair with ΔHL.N.mix. The characteristics of the main element derived for the ternary BMGs are directly applicable to multicomponent BMGs belonging to G-I, G-II, G-IV (Mg-based BMGs), G-V and G-VII. The main element can be the larger-sized element in the atomic pair with ΔHL.N.mix or in the same group as the other elements for multicomponent BMGs belonging to G-III, G-IV (Be-containing Zr-based BMG) and G-VI. The main element of BMGs belonging to G-VI tends to change from the element with the smallest atomic radius in a ternary system to an element with a relatively large atomic size in a multicomponent system. The change is due to an increase in glass-forming ability through multicomponent alloying of BMGs belonging to G-VI. The results of the classification of BMGs obtained in the present study are important for further development of BMGs, with the results providing a road map for the development of new BMG compositions.Keywords
This publication has 32 references indexed in Scilit:
- Ultra-high strength above 5000 MPa and soft magnetic properties of Co–Fe–Ta–B bulk glassy alloysActa Materialia, 2004
- Formation of Ca–Mg–Zn bulk glassy alloy by casting into cone-shaped copper moldJournal of Materials Research, 2004
- Bulk Metallic Glasses for Industrial ProductsMATERIALS TRANSACTIONS, 2004
- Ni-Based Refractory Bulk Amorphous Alloys with High Thermal StabilityMATERIALS TRANSACTIONS, 2003
- Formation and Thermal Stability of Ca-Mg-Ag-Cu Bulk Glassy AlloysMATERIALS TRANSACTIONS, 2002
- Formation, Thermal Stability and Mechanical Properties of Ca-Based Bulk Glassy AlloysMATERIALS TRANSACTIONS, 2002
- Ti-based amorphous alloys with a large supercooled liquid regionMaterials Science and Engineering: A, 2001
- Ni-based bulk amorphous alloys in the Ni–Ti–Zr–(Si, Sn) systemJournal of Materials Research, 2000
- Stabilization of metallic supercooled liquid and bulk amorphous alloysActa Materialia, 2000
- New Amorphous Mg-Ce-Ni Alloys with High Strength and Good DuctilityJapanese Journal of Applied Physics, 1988