Phase diagram, superlattices and antiphase domains of Fe3Alx, 0.75 ≤ x ≤ 1.3, investigated by neutron scattering

K. Hilfrich; W. Petry; O. Schärpf; E. Nembach

doi:10.1016/0956-7151(94)90270-4

Phase diagram, superlattices and antiphase domains of Fe₃Al_x, 0.75 ≤ x ≤ 1.3, investigated by neutron scattering

K. Hilfrich
, W. Petry
, O. Schärpf
, E. Nembach

University of Münster
Helmholtz-Zentrum Hereon outstation at Heinz Maier-Leibnitz Zentrum (MLZ)
Institut Laue-Langevin

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The states of order of iron-aluminium-alloys with compositions around Fe₃Al have been investigated by neutron scattering. The results lead to the following description of their structures: (i) These alloys have the long-range ordered DO₃ structure up to the following temperatures: Fe-0.2Al up to at least 873 K, Fe-0.25Al and Fe-0.3Al up to about 1050 K, atomic fractions of Al are quoted. (ii) Some phase boundaries shown in the current FeAl phase diagram turned out to be no phase boundaries at all, but to have bearing only on the size of antiphase domains. There are critical temperatures above which antiphase domain boundaries are in thermodynamic equilibrium. The present results suggest revisions of the current FeAl phase diagram.

Original language	English
Pages (from-to)	731-741
Number of pages	11
Journal	Acta Metallurgica Et Materialia
Volume	42
Issue number	3
DOIs	https://doi.org/10.1016/0956-7151(94)90270-4
State	Published - Mar 1994
Externally published	Yes

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title = "Phase diagram, superlattices and antiphase domains of Fe3Alx, 0.75 ≤ x ≤ 1.3, investigated by neutron scattering",

abstract = "The states of order of iron-aluminium-alloys with compositions around Fe3Al have been investigated by neutron scattering. The results lead to the following description of their structures: (i) These alloys have the long-range ordered DO3 structure up to the following temperatures: Fe-0.2Al up to at least 873 K, Fe-0.25Al and Fe-0.3Al up to about 1050 K, atomic fractions of Al are quoted. (ii) Some phase boundaries shown in the current FeAl phase diagram turned out to be no phase boundaries at all, but to have bearing only on the size of antiphase domains. There are critical temperatures above which antiphase domain boundaries are in thermodynamic equilibrium. The present results suggest revisions of the current FeAl phase diagram.",

author = "K. Hilfrich and W. Petry and O. Sch{\"a}rpf and E. Nembach",

year = "1994",

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T1 - Phase diagram, superlattices and antiphase domains of Fe3Alx, 0.75 ≤ x ≤ 1.3, investigated by neutron scattering

AU - Hilfrich, K.

AU - Petry, W.

AU - Schärpf, O.

AU - Nembach, E.

PY - 1994/3

Y1 - 1994/3

N2 - The states of order of iron-aluminium-alloys with compositions around Fe3Al have been investigated by neutron scattering. The results lead to the following description of their structures: (i) These alloys have the long-range ordered DO3 structure up to the following temperatures: Fe-0.2Al up to at least 873 K, Fe-0.25Al and Fe-0.3Al up to about 1050 K, atomic fractions of Al are quoted. (ii) Some phase boundaries shown in the current FeAl phase diagram turned out to be no phase boundaries at all, but to have bearing only on the size of antiphase domains. There are critical temperatures above which antiphase domain boundaries are in thermodynamic equilibrium. The present results suggest revisions of the current FeAl phase diagram.

AB - The states of order of iron-aluminium-alloys with compositions around Fe3Al have been investigated by neutron scattering. The results lead to the following description of their structures: (i) These alloys have the long-range ordered DO3 structure up to the following temperatures: Fe-0.2Al up to at least 873 K, Fe-0.25Al and Fe-0.3Al up to about 1050 K, atomic fractions of Al are quoted. (ii) Some phase boundaries shown in the current FeAl phase diagram turned out to be no phase boundaries at all, but to have bearing only on the size of antiphase domains. There are critical temperatures above which antiphase domain boundaries are in thermodynamic equilibrium. The present results suggest revisions of the current FeAl phase diagram.

UR - https://www.scopus.com/pages/publications/0028386745

U2 - 10.1016/0956-7151(94)90270-4

DO - 10.1016/0956-7151(94)90270-4

M3 - Article

AN - SCOPUS:0028386745

SN - 0956-7151

VL - 42

SP - 731

EP - 741

JO - Acta Metallurgica Et Materialia

JF - Acta Metallurgica Et Materialia

IS - 3

ER -

Phase diagram, superlattices and antiphase domains of Fe₃Al_x, 0.75 ≤ x ≤ 1.3, investigated by neutron scattering

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