TY - JOUR
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 - http://www.scopus.com/inward/record.url?scp=0028386745&partnerID=8YFLogxK
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 -