Phase selection during pulsed laser annealing of manganese

Follstaedt, D. M.; Peercy, P. S.; Perepezko, J. H.
February 1986
Applied Physics Letters;2/3/1986, Vol. 48 Issue 5, p338
Academic Journal
Pulsed (25 ns) laser-induced heating of the α phase of Mn is found to be sufficiently rapid to bypass solid-state transformation to the high-temperature β, γ, and δ allotropes and thus produce melts that are calculated to be undercooled by ∼120 K with respect to the equilibrium melting temperature of the δ phase. Nucleation of the γ phase in this highly undercooled melt is observed for sufficiently long melt durations. The experiments thus demonstrate that pulsed laser-induced melting of metals with allotropes permits the study of nucleation and growth in highly undercooled melts with calculable temperatures.


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