The Physical Properties Of Aluminium-7xxx Series Alloys Produced By Powder Metallurgy Method

Year 2018, Volume: 21 Issue: 2, 341 - 350, 01.06.2018

Ayşe Nur Acar , Abdül Kadir Ekşi Ahmet Ekicibil

https://doi.org/10.2339/politeknik.389588

Cited By: 1

Abstract

Alumix-431 materials   were prepared by cold and warm compaction
method applying 350-400 MPa pressures at RT (room temperature) 50 and 80°C
temperatures.  The density measurements
of materials were performed; the thermoelectric properties of materials were
investigated at 5-300K under the He atmosphere, and the relationship between
the measurements and sample properties was examined. The measurements of
thermoelectric properties showed that maximum resistivity [Alumix -431-1] and
thermal conductivity [Alumix -431-6] values were obtained 0.161Ωm and
24.31W/Km, respectively at 285-295K temperature ranges and minimum electrical
resistivity and thermal conductivity values 
were obtained on Alumix-431-6 and Alumix-431-1 samples, respectively. It
was observed that Seebeck coefficient values varied mostly from negative sign to
positive sign indicated dominate from carriers. 
The maximum Figure of merit value was determined as 18.71×10^-2;
on the Alumix-431-5 alloy at 96.904K

Keywords

Cold and warm compaction, powder metallurgy thermoelectric properties, Al-7xxx alloys

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