Preparation of Ti‐Zr‐B ternary amorphous alloys by a single‐roller melt‐spinning technique and their thermal stability

Continuous ribbons of Ti‐Zr‐B ternary alloys, consisting of early transition metal and metalloid elements, were formed by a single‐roller melt‐spinning method. Details of the quenching method employing a modified levitation melting technique are herein described. Amorphous phases were obtained in the composition range of 15 at. %≤B≤25 at. % and 20 at. %≤Zr≤50 at. %. The crystallization of the amorphous alloy took place in two steps. Initially, the amorphous phase changed polymorphously into a boron supersaturated bcc‐like phase, and then this bcc‐like phase decomposed into a bcc phase and a (Ti, Zr)B compound phase. The crystallization temperature was extraordinarily low (∼320 °C) in contrast to the high melting point and the strong chemical bonding between the metal and metalloid elements.