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Journal > JURNAL FISIKA Himpunan Fisika Indonesia > EFFECT OF SINTERING TEMPERATURE AND 5 WT.% Al(NO3) 3 ADDITIVE TO METAL MATRIX COMPOSITES CHARACTERISTICS BY POWDER METALLURGY TECHNIQUE

 

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JURNAL FISIKA Himpunan Fisika Indonesia
Vol 8, No 1 (2008)
EFFECT OF SINTERING TEMPERATURE AND 5 WT.% Al(NO3) 3 ADDITIVE TO METAL MATRIX COMPOSITES CHARACTERISTICS BY POWDER METALLURGY TECHNIQUE
Khaerudini, Deni Shidqi ( Pusat Penelitian Fisika – LIPI, Kawasan Puspiptek Serpong, Tangerang 15314)
Tetuko, Anggito Pringgo ( Pusat Penelitian Fisika – LIPI, Kawasan Puspiptek Serpong, Tangerang 15314)
Ginting, Masno ( Pusat Penelitian Fisika – LIPI, Kawasan Puspiptek Serpong, Tangerang 15314)
Article Info   ABSTRACT
Published date:
23 Jul 2013
 
Dalam penelitian ini, komposit matriks logam Al/SiC telah diproduksi melalui teknik metalurgi serbuk. Perekayasaan permukaan serbuk SiC dilakukan dengan proses pelapisan oksida logam menggunakan aditif Al(NO3)3 5 % berat. Proses pelapisan dilakukan untuk menaikkan tingkat kebasahan (wettability) serbuk pada interface matriks (Al) dan penguat (SiC). Proses mekanisme metalurgi serbuk, antara lain: wet mixing, penekanan dingin pada 120 MPa, dan sintering dalamkondisi atmosfir gas argon dan dipanaskan dengan heating rate pada 150C/min. Proses sintering dilakukan dalam tungku elektrik tabung pada suhu sinter yang berbeda (450, 500, 550, and 6000C) untuk komposisi penguat 20 % berat SiC dan waktu tahan selama 1 jam. Pengujian substrat meliputidensitas dan porositas menggunakan prinsip Archimedes. Pengujian mikrostruktur dilakukan untuk mengevaluasi homogenitas dan interaksi antar penyusun. Hasil pengujian menunjukkan kecenderungan pola peningkatan nilai densitas atau penuruanan nilai porositas dengan meningkatnyasuhu sintering. Analisa SEM menunjukkan distribusi partikel Al dan SiC yang relatif homogen. Sedangkan uji analisa XRD menunjukkan bahwa pengaruh suhu sintering telah diperlihatkan melalui pola-pola puncak XRD.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 15 0C/min. Sintering were carried out in an electrical tube furnace at different sinter temperatures (450, 500, 550, and 600 0C) 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.  
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