EFFECT OF SINTERING TEMPERATURE AND 5 WT.% Al(NO3) 3 ADDITIVE TO METAL MATRIX COMPOSITES CHARACTERISTICS BY POWDER METALLURGY TECHNIQUE
ABSTRACT: In this work, Al/SiC
metal matrix composites have been successfully produced by powder metallurgy process.
The surface arrangement of SiC powder were performed by oxide metal coating
process using an extra addition of Al(NO3)3 5 wt.%. The coating process was
promoted to enhance the wetting at the matrix (Al) and reinforcement (SiC)
interface. The mechanism of powder metallurgy processes include: wet mixing,
cold compaction at 120 MPa, and sintering under high purity argon atmosphere and
heated at a rate of 150C/min. Sintering were carried out in an
electrical tube furnace at different sinter temperatures (450, 500, 550, and
6000C) for 20 wt.% SiC and holding time for 1 hour. The testing of
substrate includes density and porosity using the Archimedes principle. For the
microstructure characterization was investigated to evaluate the homogeneity and interaction
the constituent. Results from the investigation show the increasing (decreasing) tendency of
density and porosity by the increasing of sintering temperature. The SEM
analysis shows relative homogeneity of distribution of Al and SiC particle.
Thus, the XRD analysis reveals that the
influence of sintering temperature was confirmed by the XRD pattern.
Author: Deni S. Khaerudini,
Anggito P. Tetuko, and M. Ginting
Journal Code: jpfisikagg080005
