Studies on primary crystallization of rapidly quenched Al-Ni-Cu-Nd metallic glass by using high resolution transmission electron microscopy

Y. D. Xiao, W. X. Li, D. Jacovkis, N. Clavaguera, M. T. Clavaguera-Mora, J. Rodriguez-Viejo

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

Rapidly solidified Al87Ni7Cu3Nd3 metallic glasses, prepared by using melt spinning, were treated under both isothermal and non-isothermal regime. The amorphous ribbon and the annealed samples were examined by means of differential scanning calorimetry, X-ray diffraction and high resolution transmission electron microscopy with selected-area electron diffraction. The results show that, the as-prepared ribbons are fully amorphous and homogeneous in the micron scale, but contain high density of quenched-in clusters or crystallite embryos. Primary crystallization mainly leads to formation of two-phase mixture of α-Al crystal and residual amorphous phase. The annealed ribbons exposed isothermally at 110°C for 5,130 minutes and heated continuously up to less than 310°C at 40°C/min consist of large amount of α-Al fcc crystal nanoparticles dispersed uniformly in an amorphous matrix. A very little amount of finer orthorhombic Al3Ni intermetallics particles exist in the annealed ribbons heated up to 310°C. During primary crystallization, the leading kinetic mechanics to impede the growth of α-Al crystal is soft impingement, instead of geometric impingement.
Original languageEnglish
Pages (from-to)407-415
JournalActa Metallurgica Sinica (English Letters)
Volume16
Issue number5
Publication statusPublished - 1 Oct 2003

Keywords

  • Al-rich amorphous alloy
  • Crystallization
  • Nucleation and growth mechanism
  • Rapid solidification

Fingerprint

Dive into the research topics of 'Studies on primary crystallization of rapidly quenched Al-Ni-Cu-Nd metallic glass by using high resolution transmission electron microscopy'. Together they form a unique fingerprint.

Cite this