Abstract
The maximum undercoolability of CuSn and CuIn alloys has been investigated as a function of concentration using the droplet dispersion technique. A very pronounced peak in the relative undercooling ΔT/ T L ( T L is the liquidu temperature) has been observed at an Sn concentration of 37 at.% and at an In concentration of 50 at.% respectively. The position of the peak correlates with the concentration of electrons per atom (e/a). The results are interpreted within the framework of a model developed to explain the stability of amorphous samples of the same class of alloys vs. composition. The analysis leads to the conclusion that electrons may stabilize the metastable state of an undercooled melt if the first peak in the structure factor at K pe coincides with 2 k F (where k F is the wave vector of Fermi electrons). According to our measurements this is the case if the concentration corresponds to a mean number of electrons per atom of e/a = 2.0, slightly different from e/a = 1.8 proposed in the literature.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
