ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The lattice parameter changes with varying composition of the binary σ phases NbAl and TaAl are explained in terms of changes in occupancy of the various crystallographic sites using geometrical formulae derived from a sphere packing model. These order changes throughout the composition range are shown to be mainly caused by the replacement of transition metal atoms by Al atoms in the C-type crystallographic sites, stressing the importance of this site in the stability of the σ phase. The Al occupancy of these sites is closely linked to the composition range of these phases.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00542816