Sintering Effect on The Microstructure and Magnetic Properties of Co-AlxOy Composite Compound  

Oleh:

Mulyaningsih, Sri ; Purwanto, Setyo ; Mujamilah ; Adi, Wisnu Ari ; Manaf, Azwar

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: IPTEK: The Journal for Technology and Science vol. 19 no. 2 (May 2008), page 41-46.
Topik: Sintering; Microstructure; Co-AlxOy; Milling; Magnetic

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: MM48.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Research on sintering effect on the microstructure and the magnetic properties of composite Co-AlxOy materials has been done. The experiment was carried out by high energy milling (HEM) to refine Co and Al sample powder, followed by sintering process. The composition of sample was Co73Al27 wt% with weight ratio to the ball was 1:2.7. The milling time was varied within 4.5, 12 and 20 hours, while sintering process was conducted at 384 celcius degree ad 484 celcius degree. Several new peaks were found after sintering process and identified as a Co-Al2O4 compound. The experiment data shows the saturation magnetization Ms value was decline for the entire sample by the sintering process. The Mr value for the 12h milling was remind stable about 9 emu/gr but, for 4.5 milling was decline from 17.5 to 9.2 and 6.2 emu/gr, while for 20h milling from 13.5 to 9.25 and 8 emu/gr. No visible changes in the microstructure are observed.

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