Abstract
The L12 intermetallic compounds are A3B type compounds (Fig. 2.1). Interest in their self-diffusion (generally occurring via the vacancy mechanism) is mainly because they are potential structural materials for high-temperature applications and, as such, understanding their properties is a key factor in their production. The random (disruptive) motion of vacancies in ordered intermetallic compounds is not possible (since the equilibrium arrangement of the atoms is interrupted by such a motion) except at high temperatures, when their atomic arrangement becomes disordered. To better understand the vacancy/atom exchange mechanism, an illustration of an L12 structure appears below.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Divinski SV, Frank S, Södervall U, Herzig C (1998) Solute diffusion of Al-substituting elements in Ni3Al and the diffusion mechanism of the minority component. Acta Mater 46:4369–4380
Frank S, Södervall U, Herzig C (1995) Self-diffusion of Ni in single and polycrystals of Ni3Al: a study of SIMS and radiotracer analysis. Phys Status Solidi B 191(1):45–55
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2017 Springer International Publishing Switzerland
About this chapter
Cite this chapter
Pelleg, J. (2017). Diffusion Mechanisms in L12 Structures. In: Diffusion in the Iron Group L12 and B2 Intermetallic Compounds. Engineering Materials. Springer, Cham. https://doi.org/10.1007/978-3-319-39522-7_2
Download citation
DOI: https://doi.org/10.1007/978-3-319-39522-7_2
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-39521-0
Online ISBN: 978-3-319-39522-7
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)