A detailed study of metallic glass formation in copper-hafnium-titanium alloys

作者：Figueroa Ignacio A^*; Baez Pimiento Sandro; Plummer John D; Novelo Peralta Omar; Davies Hywell A; Todd Iain

来源：Acta Metallurgica Sinica (English Letters), 2012, 25(6): 409-419.

DOI：10.11890/1006-7191-126-409

• Metallic glass formation
• Glassy Cu-Hf-Ti alloy
• Glass forming ability
• Melt spinning
• Copper mould suction-casting

Recently we have reported a number of bulk glass forming compositions in the Cu-Hf-Ti system, with the critical thickness for complete glass formation, d(c), ranging from 2 mm to 4 mm. In order to improve the glass forming ability (GFA) getting even larger d(c), the prevailing approach is to use complex multicomponent systems. This strategy has been investigated by us for the Cu-Hf-Ti bulk glass forming alloy Cu55Hf25Ti20 using %26gt;1 at. pct additions of B, Y, Nb, Ta, Al, Mn, Si or V but with no significant improvement in the GFA. Clearly, it is necessary, in order to utilise the full potential of the base ternary system, to identify the best glass-forming compositions as a basis for extending the search into multi-dimensional compositional space. Thus, (CuHfxTiz)-Hf-x alloys, where x=(40-70) at. pct, y=(5-30) at. pct, and z=(10-36) at. pct, were prepared by melt spinning and copper mould suction-casting.

• 出版日期2012-12