Nonequilibrium phase transformation of NdFe11Ti compound during mechanical milling

A nonequilibrium phase transformation in a stoichiometric NdFe11Ti compound during mechanical milling was monitored by the measurements of AC susceptibility, magnetization, X-ray diffraction, and transmission electron microscopy. The sequence of nonequilibrium phase transformation has been identified as (1) the slow decomposition to mixtures of metastable Nd(Fe, Ti)(7) and alpha-Fe(Ti) phases and, finally, (II) amorphization of an Nd(Fe, Ti)(7) phase and formation of a mixture of an amorphous phase and supersaturated BCC solid solution of Ti in Fe. (C) 1998 Elsevier Science B.V. All rights reserved.