Reordering kinetics and magnetic properties of mechanically disordered nanocrystalline L1[sub 2]-type Ni[sub 3]Al + Fe alloys

Journal Article · Sat May 01 04:00:00 EDT 1993 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(93)90248-Q· OSTI ID:6189982

Yavari, A R ^[1]

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1. Domaine Univ., St Martin d'Heres (France). Inst. National Polytechnique de Grenoble

The paramagnetic disordered high temperature states of L1[sub 2] or [gamma][prime]-type Ni[sub 3]Al-Fe alloys become ferromagnetic at low temperatures if retained in metastable disordered ([gamma]) state. Using mechanical attrition (milling) which also transforms the material into nanocrystalline form, various Ni[sub 3]Al-Fe alloys have been prepared in metastable-[gamma] form and their magnetizations M([gamma]) and M([gamma][prime]) and Curie temperatures [Tc] ([gamma]) and [Tc]([gamma][prime]) measured. Fe atoms possess a giant magnetic moment in these alloys and polarize neighboring Ni atoms but this polarization effect is lower in the disordered state due to a lower number of Fe-Ni nearest neighbors resulting in M([gamma])

• OSTI ID: 6189982
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 41:5; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
GRAIN BOUNDARIES
INTERMETALLIC COMPOUNDS
IRON ALLOYS
KINETICS
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHASE TRANSFORMATIONS
TERNARY ALLOY SYSTEMS