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Synthesis of Nanocrystalline Alumina–Metal Composites by Room‐Temperature Ball‐Milling of Metal Oxides and Aluminum
Author(s) -
Matteazzi Paolo,
Caër Gerard Le
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb05499.x
Subject(s) - ball mill , nanocrystalline material , materials science , crystallite , aluminium , metal , oxide , nanocomposite , metallurgy , aluminum oxide , aluminium oxides , nanometre , composite material , nanotechnology , chemistry , catalysis , biochemistry
The synthesis of nanometer‐sized α‐Al 2 O 3 −M composites (nanocomposites) is described for M = Fe, V, Cr, Mn, Co, Ni, Cu, Zn, Nb, Mo, W, Si, and Fe alloys. The synthesis is performed by solid‐state reduction reaction which occurs during room‐temperature ball‐milling of mixtures of a metal oxide (M x O y ) and aluminum (Al 2y/3 ). A complete reduction is reached for milling times of ≅ 1.5 h in a planetary mill. The crystallite sizes of alumina and metal obatined, for powders processed in a vibratory mill, are in general about 10 nm.