a1 Centre for the Physics of Materials, McGill University, 3600 University Street, Montréal, Qubec, Canada H3A 2T8
a2 IREQ–Institut de recherche d'Hydro-Québec, Technologie des matériaux, Varenes, Québec, Canada J3X 1S1
Nanocrystalline FeTi has been prepared in two ways: by ball milling the intermetallic compound and mechanically alloying a mixture of the elemental powders. The materials obtained in each case are identical. The reaction proceeds via the formation of interfacial β–Ti(Fe) which then grows to include all of the material present. Oxygen levels above 3 at. % suppress this reaction and lead to the formation of amorphous Fe–Ti.
(Received March 02 1993)
(Accepted August 12 1993)