Advances in Production Engineering & Management
Volume 8 | Number 4 | December 2013 | pp 242–248
http://dx.doi.org/10.14743/apem2013.4.171
Characterisation of powder metallurgy Cu-ZrO2 composites
Khaloobagheri, M.; Janipour, B.; Askari, N.; Shafiee Kamal Abad, E.
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A B S T R A C T
Cu-ZrO2 composites can be used as electrical contact materials in relays, contactors,
switches, circuit breakers, electronic packaging requiring good electrical
and thermal conductivity as well as welding or brazing properties. In the
presented work copper matrix composites reinforced with 8 mol % yttriastabilised
1 wt. %, 2 wt. %, 3 wt. %, 4 wt. %, and 5 wt. % zirconia (8-YSZ) particles
were fabricated by the powder metallurgy method. Cu and Cu-ZrO2
powder mixtures were compacted with a compressive force of 500 MPa and
sintered at 900 °C for 2 h within an argon atmosphere. The results of the study
on the mechanical properties of the composites showed that with increasing
content of ZrO2, the micro-hardness and compressive strength increase. The
relative densities of the composites decreased from 96.1 % to 92.0 % with
increasing zirconia content up to 5 wt. %. The results of the electrical test on
the composites indicated that electrical conductivity reduced gradually with
increase in reinforcement content. SEM and EDS studies showed that Cu-ZrO2
composites have a uniform microstructure in which zirconia particles are distributed
uniformly in the Cu matrix.
A R T I C L E I N F O
Keywords • Powder metallurgy, Cu-ZrO2 composites, Mechanical properties, Electrical conductivity
Corresponding author • Khaloobagheri, M.
Article history • Received 29 July 2013, Revised 16 November 2013, Accepted 20 November 2013
Published on-line • 5 December 2013
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