Influence of copper, calcium and strontium on the formation of quasicrystals in Al-Mn-based alloys

Naglič, Iztok (avtor), Leskovar, Blaž (avtor), Zaky, Adam (avtor), Arah, Bor (avtor), Stojanović, Jovica (avtor), Kamberović, Željko (avtor), Boulet, Pascal (avtor), Markoli, Boštjan (avtor)

In this study, the effect of adding calcium or strontium to Al-Mn and Al-Mn-Cu alloys on the formation of quasicrystals (QCs) is investigated. The alloys were cast in a massive copper mould with a cavity diameter of 3 mm. The cast alloys were characterised by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and electron backscatter diffraction. The addition of either calcium or strontium to Al-Mn and Al-Mn-Cu alloys promotes the formation of icosahedral QCs (IQCs). The results also show that neither calcium or strontium are integral part of the QC phases formed in these alloys. The results further indicate considerable differences in the composition of decagonal QC (DQC) phases in Al-Mn-Cu alloys without and with either calcium or strontium, whereas the electron-atom ratio according to Mizutani shows almost negligible differences. The effectiveness of calcium and strontium in promoting the formation of IQCs is attributed to a reduced surface tension of the Al-based melt. This consequently leads to a decrease in the critical radius for nucleation of IQCs.

• Jezik: Angleški jezik
• Ključne besede: solidification, quasicrystals, X-ray diffraction, electron backscatter diffraction, surface tension
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: NTF - Naravoslovnotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 14.02.2026
• Leto izida: 2026
• Št. strani: Str.
• PID: 20.500.12556/RUL-179548
• UDK: 669
• ISSN pri članku: 0925-8388
• DOI: 10.1016/j.jallcom.2026.186847
• COBISS.SI-ID: 268527875
• Datum objave v RUL: 17.02.2026

Gradivo je del revije

• Naslov: Journal of alloys and compounds
• Skrajšan naslov: J. alloys compd.
• Založnik: Elsevier Sequoia
• ISSN: 0925-8388
• COBISS.SI-ID: 15375109

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P1-0195
• Naslov: Geookolje in geomateriali

• Financer: INC CNRS and the Universit´e de Lorraine
• Naslov: International Research Project MATERIOMICS