Influence of Al on glass forming ability and nanocrystallization behavior of cast-iron based bulk amorphous alloy

Hyo Yun Jung, Mihai Stoica, Seong Hoon Yi, Do Hyang Kim, Jürgen Eckert

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Cast-iron (CI) based bulk amorphous alloy with compositions of Fe75.5-xC6.0Si3.3B5.5P8.7Cu1.0Alx (x = 0, 1 at.%) was synthesized by Cu mold casting. As indicated by increased critical diameters (dmax) for the amorphization, the substitution of Al enhanced the glass-forming ability of the alloy. However, the onset temperature of crystallization (Tx) and the range of supercooled liquid region (ΔTx) of the alloy decreased upon Al addition from 500 °C and 28 °C to 475 °C and 25 °C, respectively. It was revealed that the decreased thermal stability of the amorphous phase is related to the enhanced crystallization tendency to form primary α-Fe phase. Upon the nanocrystallization of primary α-Fe phase the Al-added alloy shows enlarged Ms of 176 emu g-1, still keeping a reasonable small Hc value of 0.086 Oe. The present study revealed that the minor Al addition enhances not only the glass-forming ability, but also the nanocrystallization behavior of the CI based bulk amorphous alloy.

Original languageEnglish
Pages (from-to)818-824
Number of pages7
JournalJournal of Materials Research
Issue number6
Publication statusPublished - 2015 Nov 17


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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