Title

Study on the densification behavior of aluminum powders using microwave hot pressing process.

Authors

Abedinzadeh, Reza

Abstract

In this study, a method called microwave-assisted hot compaction process was used to fabricate bulk Al sample. After the cold pressing process of Al powders, the green compact was hot-pressed in a microwave-assisted hot press apparatus at 400 °C under the pressure of 50 MPa. Moreover, numerical simulation of microwave-assisted hot compaction process was performed using 3D finite element method. Comparison between numerical and experimental results was also investigated. The microstructure, pore distribution, and surface topography of the sample were observed by scanning electron and atomic force microscopes. The density of the bulk sample was measured by Archimedes technique. Finally, nanoindentation test was carried out to measure hardness and elastic modulus. The results showed that the sample was heated uniformly using microwave heating process. Despite the uniform heating, the top corner regions of sample exhibited higher density as compared to the bottom corner regions. However, the central regions of the sample consolidate uniformly. Also, the top corners of the sample with more densification showed an improvement in the mechanical properties of the sample.

Subjects

SOIL densification; ALUMINUM alloys; METAL powders; HOT pressing; CHEMICAL processes

Publication

International Journal of Advanced Manufacturing Technology, 2018, Vol 97, Issue 5-8, p1913

ISSN

0268-3768

Publication type

Academic Journal

DOI

10.1007/s00170-018-1867-3