Experimental study of the FeAl–NiAl–TiAl section

Fundamental aspects of symmetry and order parameter coupling for martensitic transition sequences in Heusler alloys

“…À þ 3 (a,0) gives P4/mmm, corresponding to the 0 structure of RuNb stable between $1030 and $1170 K (e.g. Dirand et al, 2012;Nó et al, 2015aNó et al, , 2015b, the roomtemperature structure of TiAl (Duarte et al, 2012) and the structure of Ni x Al 1Àx , x ' 0.64, quenched from high temperatures (Potapov et al, 1997). The low-temperature ( 00 ) structure of RuNb has been reported to be either orthorhombic, Cmmm (Chen & Franzen, 1989), or monoclinic, P2/m (Nó et al, 2015a,b) or P2 1 /m (Mousa et al, 2009).…”