Experimental Determination of the Kuczynski Equation for the Case of CuSn12 Alloy Sintering

Résumé

Sintered copper-tin alloys are used to obtain products with numerous applications. Some bronze parts such as filters or bushings for self-lubricating bearings can only be produced by specific powder metallurgy technologies. Metal filters represent an important fraction in the field of sintered products. In the paper, measurements of the intergranular bridges were made on the samples obtained by sintering the spheroidal powder from the CuSn12 alloy. Free casting in graphite moulds followed by sintering was used (9 experiments, 3 temperatures x 3 durations). With these data, the coefficients from the Kuczinski equation were determined. Thus, the correlation between the desired porosity for a filter-type product (expressed by the size of the intergranular bridge) and the sintering technological parameters can be established.