Effects of Processing Parameters in Vacuum Sintering on Properties of Cu Powder Samples
The effects of processing parameters, such as H2 reducing conditions, sintering temperature and sintering time on the sintering properties of Cu powder samples were studied. The optimal process of being reduced by H2 at 450℃ for 1.5 h, sintering 1.5 h at 850 ℃ is obtained through testing and analyzing sintering samples at different processing parameters. Under the optimal processing conditions, the density of the sintering samples is 8.57 g/cm3, being 96.3% of the theoretical density of Cu; the tensile strength of the sample is 210 MPa, approaching that of pure Cu castings.