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The Effect of Milling Time on Properties and Microstructure of Cu-Yttria Stabilized Zirconia Composites Fabricated by Powder Metallurgy

Journal of Materials Sciences and Applications
Vol.1 , No. 2, Publication Date: Apr. 17, 2015, Page: 78-84

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Authors

[1]	Mahmood Khaloobagheri, Engineering and Materials Science Department, Imam Khomaini International University, Qazvin, Iran.
[2]	Shima Abdollahi Barfjan, Electrical Engineering Department, Imam Khomaini International University, Qazvin, Iran.

Abstract

Copper - 3 wt.% yttria Stabilized zirconia (8-YSZ) composite powder synthesized by mechanical alloying under a high purity argon atmosphere in a ball mill. In order to investigate the effect of milling time on properties and microstructure of Cu-yttria Stabilized zirconia composites, 16, 32 and 64 hour are chosen. The mixtures were compacted with a compressive force of 500 MPa in a steel mold of 10 mm in diameter. The sintering process was performed in an open atmospheric furnace at the temperature of 900 ◦C for 2 h. With study of the microstructure done by scanning electron microscopy (SEM), the microstructure of composites and the amount of dispersion of ZrO2 in copper matrix was investigated. To study mechanical and electrical properties of the composites, relative density (%), micro-hardness (HV) and electrical conductivity (%IACS) of the samples were measured and the results were discussed.

Keywords

Cu-ZrO2 Composite, Milling Time, Powder Metallurgy, Mechanical Alloying

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