20.500.12556/RUL-179548 Influence of copper, calcium and strontium on the formation of quasicrystals in Al-Mn-based alloys 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. solidification quasicrystals X-ray diffraction electron backscatter diffraction surface tension true false true Angleški jezik Angleški jezik Članek v reviji 2026-02-17 04:12:56 2026-02-17 09:45:53 2026-02-18 04:22:26 0000-00-00 00:00:00 2026 0 0 Str. 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-02-14 669 0925-8388 10.1016/j.jallcom.2026.186847 268527875 1-s2.0-S0925838826009151-main.pdf 1-s2.0-S0925838826009151-main.pdf 1 B4B4A3DC273084D1941EA51D4BA0AF24 fca6bc4b1aebcfa06ee753caff9878c8052f0af612ddc5d7b06e0f830ca57b53 756adeb3-0bdc-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=228159 https://www.sciencedirect.com/science/article/pii/S0925838826009151?via%3Dihub 0 e99a0500-0bdb-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=228158 Naravoslovnotehniška fakulteta 0 0 0