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Formation and microstructure of Ni62-xNb38Tix (x = 3, 6, 10 at.%) bulk metallic glasses

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Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 9

Abstract

In this work we report the formation and microstructure of Ni62-xNb38Tix (x = 0, 3, 6, 10 at.%) bulk metallic glasses (BMGs). The addition of Ti to Ni–Nb binary alloys is effective for the increase in stabilization of supercooled liquid and glass-forming ability (GFA). The maximum supercooled liquid region (ΔTx) of 46 K and the reduced glass transition temperature (Trg) of 0.61 were obtained for Ni56Nb38Ti6, leading to the formation of the bulk glassy alloys. The best GFA was obtained for Ni56Nb38Ti6 alloy which was located near the eutectic composition of the ternary component alloy, and glassy alloy samples up to 0.5 mm were fabricated through wedge copper mold casting. The new Ni–Nb-based bulk glassy alloys exhibit large ΔTx of 35 to 46 K. The Ni62-xNb38Tix (x = 0, 3, 6, 10 at.%) BMGs showed high Vickers microhardness in the range of 988 to 1140 HV representing good mechanical properties.

Keywords: Ni-based alloys; Bulk metallic glasses; Microstructure; Microhardness
2 Correspondence address: Prof. Conrado R. M. Afonso, Ph.D., DEMa/UFSCar, Rodovia Washington Luis, km 235, CP 676, CEP 13565-905, São Carlos – SP, Brazil, Tel.: +55 16 3351 8503, Fax: +55 16 3361 5404, E-mail:

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Received: 2012-1-30
Accepted: 2012-5-16
Published Online: 2013-06-11
Published in Print: 2012-09-01

© 2012, Carl Hanser Verlag, Munich

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https://doi.org/10.3139/146.110805
Keywords for this article
Ni-based alloys; Bulk metallic glasses; Microstructure; Microhardness

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. RQ 14 – “Rapidly Quenched and Metastable Materials”
  5. Conference Proceedings
  6. Crystallization control in highly undercooled liquids and glasses
  7. Cooling conditions for the generation of bulk metallic glasses by droplet deposition
  8. Formation and microstructure of Ni62-xNb38Tix (x = 3, 6, 10 at.%) bulk metallic glasses
  9. Compositional features of bulk metallic glasses analyzed with a tetrahedral composition diagram from s-, p-, d- and f-blocks
  10. A partial structure factor investigation of the bulk metallic glass Zr63Ni25Al12 as studied by using a combination of anomalous X-ray scattering and reverse Monte Carlo modeling
  11. Mechanical behavior of the cold-rolled Zr57Ti8Nb2.5Cu13.9Ni11.1Al7.5 metallic glass–quasicrystalline composite
  12. Effect of rapid quenching and severe plastic deformation on silver
  13. Effect of Fe and V additions on amorphous structure formation in melt spun AlNiZr alloys
  14. Processing and characterization of mechanically alloyed immiscible metals
  15. Milling-induced polymorphic transformation in MoSi2
  16. Attainment of quasicrystalline phase in Al–Cu–Fe alloy via melting and mechanical alloying
  17. Characterization of amorphous Nb oxide and its influence on Mg hydrogen sorption
  18. Mechanochemistry and H-sorption properties of Mg2FeH6-based nanocomposites
  19. Rapidly solidified Fe-base alloys as electrode materials for water electrolysis
  20. Solidification of PTA aluminide coatings
  21. Superparamagnetic CoFe2O4 prepared via a modified oxalate method
  22. People
  23. Dr. Wolfgang Hoffelner
  24. Prof. Dr. Herbert Ipser
  25. DGM News
  26. DGM News
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