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In Situ Reinforcement of Ti6Al4V Matrix Composites by Polymer‐Derived‐Ceramics Phases
Author(s) -
Fabrizi Alberto,
Bonollo Franco,
Colombo Paolo,
Biasetto Lisa
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201400362
Subject(s) - materials science , ceramic , composite material , titanium alloy , equiaxed crystals , polymer , alloy , vickers hardness test , sintering , microstructure
Ti6Al4V‐based metal matrix composites (MMCs) are successfully synthesized via a novel process route. Ti6Al4V powder is premixed with a solid preceramic polymer used as precursor for the in situ formation of a ceramic phase dispersed at the micrometer range. Ball‐milling is used to intimately mix the powders. After the pyrolysis and sintering step, a Ti 5 Si 3 and TiC dispersion within the Ti6Al4V equiaxed grains matrix is formed. The effect of the volume fraction of the polymer‐derived ceramic phase in the Ti6Al4V matrix is investigated in terms of Vickers hardness and wear resistance. The introduction of 10 vol% of ceramic reinforcement produces a homogeneous structure and results in a compact material with improved integrity and enhanced mechanical properties compared to standard cast alloy or Ti6Al4V‐based composites reported in the literature.