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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Crystal structure of Al8.77Fe0.80Ni1.20Si0.23
Mei Chen1, Changzeng Fan1,2, Bin Wen1
1State Key Laboratory of Metastable Materials Science and Technology Yanshan University,Qinhuangdao 066004 People's Republic of China.
Abstract:
The Al8.77Fe0.80Ni1.20Si0.23 (aluminium iron nickel silicate) phase, obtained via high-pressure sinter-ing of an Al-rich prealloy (nominal composition Al78.08Fe8.65Ni8.69Si4.58), is characterized as a novel phase in the Al-Si-Ni-Fe quaternary system. The obtained phase crystallizes in the space group P21/c, with lattice parameters a = 6.2093 (9), b = 6.2579 (9), c = 8.5661 (12) Å, and β = 94.877 (5)°. It is isotypic with Al9Fe0.7Ni1.28 [a = 6.2406 (1), b = 6.2993 (1), c = 8.5992 (1) Å, and β = 95.129 (1)°; Chumak et al. (2007 ▸). Inter-metallics, 15, 1416-1424] and Co2Al9 [a = 6.2163 (3), b = 6.2883 (3), c = 8.5587 (3) Å, and β = 94.772 (4)°; Boström et al. (2005 ▸). Z. Anorg. Allg. Chem. 631, 534-541]. It features a co-occupancy of Al and Si atoms with a ratio of the refined site-occupancy factors of 0.88 (10):0.12 (10), as well a co-occupancy Ni/Fe with site-occupancy factors of 0.60 (4):0.40 (4).
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