ChemInform Abstract: PHASE EQUILIBRIUMS OF THE IRON‐NICKEL‐ALUMINUM SYSTEM FOR ALUMINUM CONTENT ABOVE 50 AT. % AND CRYSTAL STRUCTURES OF SOME TERNARY PHASES

Khaidar, Mohammed; Allibert, C.H.; Driole, J.

doi:10.1002/chin.198241021

Cited by 15 publications

(48 citation statements)

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“…c The structure of the high-temperature 3 phase, which could be Al 8 Cr 5 , has not yet been settled. d This phase has been reported by Khaidar et al [31], and is only stable in a narrow temperature range (w800 e900 C). A quasi-crystalline phase with composition Al 71.6 Fe 5.4 Ni 23.0 has also been reported by Lemmerz et al [32], Grushko et al [33], and Lemmerz [34] and was found to be stable from 847 C to 930 C. a disordered fcc solid solution encompassing the whole compositional range, here designated by g-(Fe,Ni).…”

Section: Niealmentioning

confidence: 83%

Assessment of the Fe–Ni–Al system

Frisk²,

2006

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Section: Niealmentioning

confidence: 83%

Assessment of the Fe–Ni–Al system

Frisk²,

2006

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“…The same happened in the system Al--Cu--Li, where Hardy, Silcock (1956) found a phase T 2 with weak, "fairly simple", but not cubic powder pattern, later identified as QC (Saintfort, Dubost, Dubus, 1985;Ball, Lloyd, 1985). Lemmerz, Grushko, Freiburg, Jansen (1994) identified the unknown stable phase Al 10 FeNi 3 , discovered in a study of the phase diagram Al--Fe--Ni (Khaidar, Allibert, Driole, 1982), as decagonal phase. The Z phase in the system Mg--Zn--Y (Padezhnova, Melnik, Miliyevskiy, Dobatkina, Kinzhibalo, 1982) also corresponds to a quasicrystalline phase (Luo, Zhang, Tang, Zhao, 1993).…”

mentioning

confidence: 77%

“…Lemmerz, Grushko, Freiburg, Jansen (1994) identified the unknown stable phase Al 10 FeNi 3 , discovered in a study of the phase diagram Al--Fe--Ni (Khaidar, Allibert, Driole, 1982), as decagonal phase. The stability range resulted to be rather narrow around Al 71 Fe 5 Ni 24 at temperatures between 1120 and 1200 K. The quasilattice parameter was determined to a ¼ 3.78 A, the periodicity to 4.11 A.…”

Section: Al--fe--nimentioning

confidence: 99%

Twenty years of structure research on quasicrystals. Part I. Pentagonal, octagonal, decagonal and dodecagonal quasicrystals

Steurer¹

2004

Zeitschrift Für Kristallographie - Crystalline Materials

241

102

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Is quasicrystal structure analysis a never-ending story? Why is still not a single quasicrystal structure known with the same precision and reliability as structures of regular periodic crystals? What is the state-of-the-art of structure analysis of axial quasicrystals? The present comprehensive review summarizes the results of almost twenty years of structure analysis of axial quasicrystals and tries to answer these questions as far as possible. More than 2000 references have been screened for the most reliable structural models of pentagonal, octagonal, decagonal and dodecagonal quasicrystals. These models, mainly based on diffraction data and/or on bulk and surface microscopic images are critically discussed together with the limits and potentialities of the respective methods employed.

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“…For the system Fe-NiAl there is no complete isothermal section at 900°C in the literature; therefore, the partial isothermal section for the Al-poor side at 900°C [46] was combined with a partial isothermal section covering the Al-rich side at 950°C. [47] The latest assessment can be found in Ref 8 and 10. …”

Section: Ternary Subsystemsmentioning

confidence: 99%

On the Quaternary System Ti-Fe-Ni-Al

Yan

Grytsiv

Rogl

et al. 2008

J Phs Eqil and Diff

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The homogeneity ranges of the Laves phases and phase relations concerning the Laves phases in the quaternary system Ti-Fe-Ni-Al at 900°C were defined by x-ray powder diffraction (XPD) data and electron probe microanalysis (EPMA). Although at higher temperatures the Laves phase forms a continuous solid solution, two separate homogeneity fields of TiFe 2 -based (denoted by k Fe ) and Ti(TiNiAl) 2 -based (denoted by k Ni ) Laves phases appear at 900°C. The relative locations of Laves phases, G phase, Heusler phase, and CsCl-type phase as well as the associated tie-tetrahedra were experimentally established in the quaternary for 900°C and presented in three-dimensional (3D) view. Furthermore, a partial isothermal section TiFe 2 -TiAl 2 -TiNi 2 was constructed, and a connectivity scheme, derived for equilibria involving Laves phases in the Ti-Fe-Ni-Al quaternary system at 900°C was derived. As a characteristic feature of the quaternary phase diagram, the solid solubility of fourth elements in both the TiFe 2 -based and Ti(NiAl) 2 -based Laves phases is limited at 900°C and is dependent on the ternary Laves phase composition. A maximum solubility of about 8 at.% Ni is reached for composition Ti 33.3 Fe 33.3 Al 33.4 . Structural details have been evaluated from powder x-ray and neutron diffraction data for (i) the Ti-Fe-Ni ternary and the Ti-Fe-Ni-Al quaternary Laves phases (MgZn 2 -type, space group: P6 3 /mmc) and (ii) the quaternary G phase. Atom site occupation behavior for all phases from the quaternary system corresponds to that of the ternary systems. For the quaternary Laves phase, Ti occupies the 4f site and additional Ti (for compositions higher than 33.3 at.%Ti) preferably enters the 6h site. Aluminum and (Fe,Ni) share the 6h and the 2a sites. The compositional dependence of unit cell dimensions, atomic coordinates, and interatomic distances for the Laves phases from the quaternary system is discussed. For the quaternary cubic G phase, a centrosymmetric as well as a noncentrosymmetric variety was observed depending on the composition: from combined x-ray and neutron powder diffraction measurements Ti 33.33 Fe 13.33 Ni 10.67 Al 42.67 was found to adopt the lower symmetry with space groupF " 43m.

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ChemInform Abstract: PHASE EQUILIBRIUMS OF THE IRON‐NICKEL‐ALUMINUM SYSTEM FOR ALUMINUM CONTENT ABOVE 50 AT. % AND CRYSTAL STRUCTURES OF SOME TERNARY PHASES

Cited by 15 publications

References 0 publications

Assessment of the Fe–Ni–Al system

Assessment of the Fe–Ni–Al system

Twenty years of structure research on quasicrystals. Part I. Pentagonal, octagonal, decagonal and dodecagonal quasicrystals

On the Quaternary System Ti-Fe-Ni-Al

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