Formation of Ti-Zr-Ni-Cu-Be-Nb bulk metallic glasses

J. N. Mei, J. S. Li, H. C. Kou, J. L. Soubeyroux, H. Z. Fu, L. Zhou

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14 Scopus citations

Abstract

The investigations of the phase constitutes and microstructure were performed on as-cast (Ti40Zr25Ni8Cu9Be18)100-xNbx (x = 0, 3, 5, 8, 10) (Ø 3) glass forming alloys. Large quantities of icosahedral quasicrystals are found to distribute in the glassy matrix of alloys with Nb content 3 and 5 at.%, fully amorphous phase with 8 at.% Nb, and a few nanocrystals corresponding to a CuTi-phase precipitating in the glassy matrix with 10 at.% Nb. In addition, 8 at.% Nb-containing alloy exhibits relatively good glass forming ability as well as Nb-free alloy. The activation energy for the first crystallization of this alloy is 249.80 kJ/mol, larger than that of the Nb-free alloy; moreover, this alloy possesses higher room temperature compressive fracture strength (2083 MPa), although it exhibits smaller plasticity (2.1%) than that of Nb-free alloy.

Original languageEnglish
Pages (from-to)235-240
Number of pages6
JournalJournal of Alloys and Compounds
Volume467
Issue number1-2
DOIs
StatePublished - 7 Jan 2009

Keywords

  • Metallic glasses
  • Microstructure
  • Phase transitions
  • Precipitation
  • Quasicrystals
  • Ti alloys

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