ǂThe ǂinfluence of cooling rate on the microstructure of an Al-Mn-Be alloy

Niko Rozman (Author), Tonica Bončina (Author), Ivan Anžel (Author), Franc Zupanič (Author)

Abstract

In ternary Al-Mn-Be alloys a metastable quasicrystalline phase can form at relatively low cooling rates (≈ 100 K/s); however, besides the quasicrystalline phase other phases can also be present. We found that the investigated alloy is very prone to the formation of metastable phases, which are also quasicrystalline. Using different investigation methods we determined the type of phases, their shape, morphology, chemical composition and distribution. Special attention was given to the micro- and nano-sized quasicrystalline particles. When using slow cooling, Al10Mn3 and Be4AlMn were present; however, with a faster cooling rate a quasicrystal approximant and a quasicrystalline phase were formed.

Keywords

aluminium;quasicrystals;cooling rate;microstructure;

Data

Language:	English
Year of publishing:	2008
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	Inštitut za kovinske materiale in tehnologije Ljubljana
UDC:	620.715:620.18
COBISS:	675242
ISSN:	1580-2949
Parent publication:	Materiali in tehnologije
Views:	1016
Downloads:	55
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Other data

Secondary language:	Slovenian
Secondary title:	Vpliv ohlajevalne hitrosti na mikrostrukturo zlitine Al-Mn-Be
Secondary abstract:	V ternarnem zlitinskem sistemu Al-Mn-Be lahko nastane metastabilna kvazikristalna faza pri relativno majhni ohlajevalni hitrosti (≈ 100 K/s), vendar lahko poleg nje nastanejo še druge kristalne faze (predvsem intermetalne faze). Z uporabo različnih raziskovalnih metod smo ugotovili vrsto nastalih faz, kemijsko sestavo in porazdelitev. Ugotovili smo, da je zlitina nagnjena k nastanku metastabilnih faz (tudi kvazikristalnih). Predvsem so zanimivi kvazikristalni delci, ki se pojavljajo v mikro- in nanometrskih velikostih. S počasnim ohlajanjem so nastale faze Al10Mn3 in Be4AlMn, pri hitrem ohlajanju pa so se namesto njih pojavili kvazikristalni aproksimanti in kvazikristalne faze.
Secondary keywords:	aluminij;kvazikristali;ohlajevalna hitrost;mikrostruktura;
URN:	URN:NBN:SI
Type (COBISS):	Scientific work
Pages:	str. 65-68
Volume:	ǂVol. ǂ42
Issue:	ǂno. ǂ2
Chronology:	2008
ID:	1736692