A detailed study of metallic glass formation in copper-hafnium-titanium alloys
来源期刊：Acta Metallurgica Sinica2012年第6期
论文作者：Ignacio A.Figueroa Sandro Baez-Pimiento John D.Plummer Omar Novelo-Peralta Hywell A.Davies Iain Todd
文章页码：409 - 419
摘 要：Recently we have reported a number of bulk glass forming compositions in the CuHf-Ti system,with the critical thickness for complete glass formation,dc,ranging from 2 mm to 4 mm.In order to improve the glass forming ability （GFA） getting even larger dc,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 >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,CuxHfyTiz alloys,where x=（40-70） at.pct,y=（5-30） at.pct,and z=（10-36） at.pct,were prepared by melt spinning andcopper mould suction-casting.The composition dependence of the GFA for the Cu-Hf-Ti alloys,as measured by dc for rod and ribbon samples,is reported over the composition range given above.
Ignacio A.Figueroa1，Sandro Baez-Pimiento1，John D.Plummer2，Omar Novelo-Peralta1，Hywell A.Davies3，Iain Todd3
1. Department of Metallic and Ceramic Materials,Institute for Materials Research,National Autonomous University of Mexico(UNAM),Mexico D.F.,C.P.04510,Mexico2. Department of Materials,Imperial College London,Royal School of Mines,Prince Consort Road,SW7 2BP,U.K.3. Department of Materials Science and Engineering,University of Sheffield,Mappin St,Sheffield S1 3JD,U.K.
摘 要：Recently we have reported a number of bulk glass forming compositions in the CuHf-Ti system,with the critical thickness for complete glass formation,dc,ranging from 2 mm to 4 mm.In order to improve the glass forming ability （GFA） getting even larger dc,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 >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,CuxHfyTiz alloys,where x=（40-70） at.pct,y=（5-30） at.pct,and z=（10-36） at.pct,were prepared by melt spinning andcopper mould suction-casting.The composition dependence of the GFA for the Cu-Hf-Ti alloys,as measured by dc for rod and ribbon samples,is reported over the composition range given above.
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