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

Autor: Jung, Hyo Yun, Stoica, Mihai, Yi, Seong Hoon, Kim, Do Hyang, Eckert, Jürgen
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Druh dokumentu: Článek
ISSN: 0884-2914
2044-5326
DOI: 10.1557/jmr.2015.48
Popis: Cast-iron (CI) based bulk amorphous alloy with compositions of Fe₇₅.₅₋ₓC₆.₀ Si₃.₃B₅.₅P₈.₇Cu₁.₀Alₓ (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.
Databáze: Networked Digital Library of Theses & Dissertations
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