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http://dx.doi.org/10.4150/KPMI.2011.18.4.365

Fabrication of Gradient Porous Al-Cu Sintered Body  

Byun, Jong-Min (Division of Materials Science and Engineering, Hanyang University)
Kim, Se-Hoon (Division of Materials Science and Engineering, Hanyang University)
Kim, Jin-Woo (Division of Materials Science and Engineering, Hanyang University)
Kim, Young-Moon (Division of Materials Science and Engineering, Hanyang University)
Kim, Young-Do (Division of Materials Science and Engineering, Hanyang University)
Publication Information
Journal of Powder Materials / v.18, no.4, 2011 , pp. 365-371 More about this Journal
Abstract
In this study, gradient porous Al-Cu sintered body was fabricated by powder metallurgy processing. Al-Cu powder mixtures were prepared by low energy ball milling with various milling time. After ball milling for 3h, the shape of powder mixtures changed to spherical type with size of 100~500 ${\mu}m$. Subsequently, Al-Cu powder mixtures were classified (under 150, 150~300 and over 300 ${\mu}m$) and compacted (20, 50 and 100 MPa). Then, they were sintered at $600^{\circ}C$ for various holding time (10, 30, 60 and 120 min) in $N_2$ atmosphere. The sintered bodies had 32~45% of porosity. As a result, the optimum holding time was determined to be 60 min at $600^{\circ}C$ and sintered bodies with various porosity were obtained by controlling the compacting pressure.
Keywords
Sintering; Al-Cu powder; Porous body; Gradient structure;
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