Complete Composition Tunability of Cu(Ni)-Ti-Zr Alloys for Bulk Metallic Glass Formation

J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (01): 39-47.

Complete Composition Tunability of Cu(Ni)-Ti-Zr Alloys for Bulk Metallic Glass Formation

徐坚

中国科学院金属所

收稿日期:2008-03-26 修回日期:2008-04-10 出版日期:2009-01-28 发布日期:2009-10-10
通讯作者: 徐坚

Complete Composition Tunability of Cu(Ni)-Ti-Zr Alloys for Bulk Metallic Glass Formation

Ze-xiu Zhang, Chun-li Dai, Jian Xu^†

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72
Wenhua Road, Shenyang 110016, China

Received:2008-03-26 Revised:2008-04-10 Online:2009-01-28 Published:2009-10-10
Contact: Jian Xu

摘要/Abstract

关键词: Bulk metallic glasses , Amorphous alloys , Eutectic , Copper

Abstract: In the Cu-Zr-Ti ternary system, a new composition zone of bulk metallic glasses (BMGs) formation was discov-ered, locating at the 55-57 at. pct Cu, 30-31 at. pct Ti and 13-14 at. pct Zr, and near Cu-Ti binary subsystem rather than the Cu-Zr binary. For these alloys, BMG rods of 2 mm in diameter can be fabricated by using copper mould casting. It is expected that these BMG-forming alloys correlate with (L→CuTi+Cu₂TiZr+Cu₅₁Zr₁₄) eutectic reaction that the undercooled melt undergoes during solidification. Adopting "3D pinpointing ap-proach", compositional dependence of glass-forming ability (GFA) in Cu(Ni)-Ti-Zr pseudo ternary system was revisited. Optimized BMG-forming composition is located at Cu_50.4Ni_5.6Ti₃₁Zr₁₃, with a critical diameter of 6 mm for complete BMG formation. Its GFA is significantly superior to Vit 101 (Cu₄₇Ni₈Ti₃₄Zr₁₁) previously developed by Caltech group. The effect that the GFA of the ternary base alloy was improved by substitution of Ni for Cu is attributed to a role of retarding the crystallization of Cu₅₁Zr₁₄ intermetallics.

Key words: Bulk metallic glasses , Amorphous alloys , Eutectic , Copper

Ze-xiu Zhang; Chun-li Dai; Jian Xu. Complete Composition Tunability of Cu(Ni)-Ti-Zr Alloys for Bulk Metallic Glass Formation[J]. J. Mater. Sci. Technol., 2009, 25(01): 39-47.

Ze-xiu Zhang,Chun-li Dai,Jian Xu. Complete Composition Tunability of Cu(Ni)-Ti-Zr Alloys for Bulk Metallic Glass Formation[J]. J Mater Sci Technol, 2009, 25(01): 39-47.

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Complete Composition Tunability of Cu(Ni)-Ti-Zr Alloys for Bulk Metallic Glass Formation

Complete Composition Tunability of Cu(Ni)-Ti-Zr Alloys for Bulk Metallic Glass Formation

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