Morphological characteristic of the conventional and melt-spun Al-10Ni-5.6Cu (in wt.%) alloy


Karakose E. , KESKİN M.

MATERIALS CHARACTERIZATION, cilt.60, ss.1569-1577, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 60 Konu: 12
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.matchar.2009.09.008
  • Dergi Adı: MATERIALS CHARACTERIZATION
  • Sayfa Sayısı: ss.1569-1577

Özet

The Al-10Ni-5.6Cu alloy was prepared by conventional casting and further processed melt-spinning technique. The resulting conventional cast and melt-spun ribbons were characterized using X-ray diffraction, optical microscopy, scanning electron microscopy together with energy dispersive spectroscopy, differential scanning calorimetry and microhardness techniques. The Xray diffraction analysis indicated that ingot samples were alpha-Al, intermetallic Al3Ni and Al2Cu phases. The optical microscopy and scanning electron microscopy results show that the microstructures of rapidly solidified ribbons are clearly different from their ingot alloy. Al-10Ni-5.6Cu ribbons reveal a very fine cellular structure with intermetallic Al3Ni particles. Moreover, at high solidification rates the melt-spun ribbons have a polygonal structure dispersed in a supersaturated aluminum matrix. The differential scanning calorimetry measurements revealed that exothermic reaction was between 290 degrees C and 440 degrees C which are more pronounced in the ternary Al-10Ni-5.6Cu alloy. 0 2009 Elsevier Inc. All rights reserved.