The glass forming ability and crystallization behavior of Mg 65Cu25Y10-xGdx (x=0, 5 and 10) alloys have been investigated. The glass forming ability (GFA) is significantly improved when Y in Mg65Cu25Y10 is substituted with Gd. Ternary Mg65Cu25Gd10 bulk metallic glass (BMG) with diameter of at least 8 mm was successfully fabricated by conventional Cu-mold casting method in air atmosphere. Mg2(Y, Gd) is the first competing crystalline phase against the glass formation in the Mg 65Cu25Y10-xGdx (x=0, 5) alloys, while Mg2Cu and Cu2Gd are the competing crystalline phases in the Mg65Cu25Gd10 alloy. Therefore, the suppression of the formation of Mg2(Y, Gd) during cooling from the liquid improves the GFA significantly.
Bibliographical noteFunding Information:
This work was supported by the Creative Research Initiatives of the Korean Ministry of Science and Technology.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry