Volume 6, Issue 2 (Spring 2009 2009) IJMSE 2009, 6(2): 24-29 | Back to browse issues page

M. Ardestani,, H. Razavizadeh,, H. Arabi, H. R. Rezaie. PREPARATION AND SINTERING OF W-20%Wt Cu COMPOSITE POWDERS PRODUCED BY CO-PRECIPITATION METHOD. IJMSE 2009; 6 (2) :24-29
URL: http://ijmse.iust.ac.ir/article-1-204-en.html

PREPARATION AND SINTERING OF W-20%Wt Cu COMPOSITE POWDERS PRODUCED BY CO-PRECIPITATION METHOD

M. Ardestani,

, H. Razavizadeh,

, H. Arabi

, H. R. Rezaie

Abstract: (38180 Views)

Abstract:
materials can be fabricated by sintering of W-Cu composite powders. In this research W-20%wt Cu composite powders
was synthesized via a co-precipitation method. Precipitate obtained from a mixture of copper nitrate and ammonium
paratungstate (APT) in distilled water contained W-Cu compounds. This precipitate was washed, dried and calcined
at 550
of dried precipitate powder was determined by thermogravimetry (TG), differential thermal analysis (DTA) and X-ray
diffraction (XRD). The sintering of the reduced powders was investigated as a function of temperature. Relative density
of more than 98% obtained for the powders sintered at 1200
close to theoretical calculations. The hardness of the sintered powders was 320 Vickers.
W-Cu composites are widely used as contacts, heat sinks and electro discharge electrodes. These kinds of°C in air and then reduced in H2 atmosphere in order to convert to W-Cu powders. The calcination temperature°C . The corresponding electrical conductivity was too

Keywords: W-Cu composites; Co-precipitation; Thermal analysis.

Type of Study: Technical Note | Subject: Ceramics

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