Premium
Cold Consolidation of Metal–Ceramic Nanocomposite Powders with Large Ceramic Fractions
Author(s) -
Menéndez Enric,
SalazarAlvarez German,
Zhilyaev Alexander P.,
Suriñach Santiago,
Baró Maria Dolors,
Nogués Josep,
Sort Jordi
Publication year - 2008
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200800456
Subject(s) - materials science , ceramic , compaction , indentation hardness , nanocomposite , consolidation (business) , composite material , ball mill , nanoscopic scale , metallurgy , microstructure , nanotechnology , business , accounting
Co/ α ‐Al 2 O 3 powder mixtures (5, 10, 20, 30, 40, and 50 mass % of α ‐Al 2 O 3 ) have been ball‐milled and, subsequently, consolidated at room temperature by means of a high pressure torsion procedure in order to produce bulk nanostructured composites. For mixtures up to 20% of α ‐Al 2 O 3 , the cold‐compaction results in roughly fully dense disks with relatively high microhardness values. However, the compaction for 30, 40, and 50% of α ‐Al 2 O 3 is less effective, resulting in a reduction of the microhardness although a structure in the nanoscale range is still preserved. A detailed structural investigation has been also performed.