Science of Sintering 2018 Volume 50, Issue 1, Pages: 51-61
https://doi.org/10.2298/SOS1801051P
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Effect of B4C reinforcement ratio and sintering temperature on the mechanical behavior in Al-B4C composites
Pul Muharrem (Kırıkkale University, Kırıkkale Vocational High School, Department of Electricity and Energy, Kırıkkale, Turkey)
In this study, powders of Al 1070 and B4C were prepared by volume in three
different reinforcement ratios 4 % B4C, 8 % B4C and 16 % B4C compacted under
the pressure of 500 MPa with cold pressing method then sintered under the
temperatures of 500, 550 and 600°C. Then the hardness was measured and wear
test was performed using pin-on-disk method. In the results of tests, the
compression pressure of 500 MPa was not sufficient for composite structure
to achieve the required density. The highest hardness values were achieved
at sintering temperature of 550°C and in 8 % B4C reinforced composite. The
highest wear rate was measured in 4% B4C reinforced composite specimen
sintered at 600°C. It is determined that a sintering temperature above 550°C
had adverse effects on the mechanical properties.
Keywords: metal matrix composite, B4C, sintering, mechanical behavior