Abstract
A Pd 20 Pt 20 Cu 20 Ni 20 P 20 bulk metallic glass (BMG) with a high-entropy (HE) alloy composition and a maximum diameter of 10 mm was fabricated by fluxed water quenching. The system and composition of the Pd 20 Pt 20 Cu 20 Ni 20 P 20 alloy were determined from a prototype ternary Pd 40 Ni 40 P 20 BMG in accordance with two strategic alloy designs of (1) HE alloy defined by an equi-atomic alloy with five or more elements and (2) exchangeability of the constituent elements with a similar chemical nature in the periodic table. Pd 20 Pt 20 Cu 20 Ni 20 P 20 HE-BMG had a supercooled liquid range of 65 K and a reduced glass transition temperature of 0.71. Successful formation of Pd 20 Pt 20 Cu 20 Ni 20 P 20 HE-BMG is significant to develop new alloys for HE alloys and BMGs. © 2011 Elsevier Ltd. All rights reserved.