Microwave Sintering of Aluminum-ZrB sub(2) Composite: Focusing on Microstructure and Mechanical Properties

Microwave assisted rapid sintering was carried out to fabricate aluminum-ZrB sub(2) metal matrix composites containing 1 wt% cobalt and 10, 15 and 20 wt% ZrB sub(2) as the reinforcements at temperatures of 600, 700 and 800[degrees]C. The results showed that the highest values of density and bending...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2016-08, Vol.19 (4)
Main Authors: Ghasali, Ehsan, Yazdani-rad, Rahim, Rahbari, Ali, Ebadzadeh, Touradj
Format: Article
Language:eng ; por ; spa
Subjects:
Aluminum
Cobalt
Compressive strength
Diamond pyramid hardness
Metal matrix composites
Microstructure
Reinforcement
Sintering
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Summary:Microwave assisted rapid sintering was carried out to fabricate aluminum-ZrB sub(2) metal matrix composites containing 1 wt% cobalt and 10, 15 and 20 wt% ZrB sub(2) as the reinforcements at temperatures of 600, 700 and 800[degrees]C. The results showed that the highest values of density and bending strength (97% of theoretical density and 240 MPa, respectively) were obtained in a composite containing 15 wt% ZrB sub(2) and 1 wt% Co sintered at 600[degrees]C. Furthermore, the optimum values of compressive strength and hardness (350 MPa and 63 Vickers, respectively) were measured for a composite containing 20 wt% ZrB sub(2) sintered at 600[degrees]C. At all sintering temperatures, XRD analysis revealed ZrB sub(2) and aluminum as the only crystalline phases. Microstructure investigations demonstrated a homogeneous distribution of ZrB sub(2) particles in the aluminum matrix.
ISSN:1516-1439
1980-5373
DOI:10.1590/1980-5373-MR-2015-0799