Direct observation of the birth of a nanocrystalline nucleus in an amorphous matrix

Rauf, Ijaz A.
October 2008
Applied Physics Letters;10/6/2008, Vol. 93 Issue 14, p143101
Academic Journal
Nucleation of crystals within an amorphous phase can be induced using electron beam irradiation in an electron microscope. In contrast to generally believed two-step phase transformation involving nucleation and growth, we observe a three-step transformation: a two-step nucleation stage followed by the growth process. The two steps in the nucleation stage are: the formation of a basic crystalline skeleton followed by the diffusion of excess defects to the periphery of the crystalline skeleton.


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