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The effect of Cu and Sb on the microstructure and mechanical properties in Sn-Sb-Cu-Ni-Cd whitemetal  

Kim, Jin-Kon (Department of Nanosystem and Nanoprocess Engineering, Pusan National University)
Kang, Dae-Sung (Shina Metaltech Co. LTD.)
Kwon, Young-Jun (Shina Metaltech Co. LTD.)
Kim, Ki-Sung (Shina Metaltech Co. LTD.)
Sang, Hie-Sun (School of Fire-protecting Technology, Kyungil University)
Cho, Hyun (Department of Nanosystem and Nanoprocess Engineering, Pusan National University)
Abstract
The effects of Cu and Sb on the microstructure and mechanical properties of Sn-Sb-Cu-Ni-Cd whitemetal were investigated. Any compound phase was not observed in the whitemetal with 0.05 wt% Cu, while as the Cu content was increased, star- or needle-like $Cu_6Sn_5$ phases were found. The tensile strength gradually increased with Cu up to 5 % and then remained almost constant with Cu content above 5 %, while the hardness continuously increased with Cu content because of the increased hard $Cu_6Sn_5$ phases. As the Sb content increased, SbSn cuboids were present as well as $Cu_6Sn_5$. The tensile steength and hardness continuously increased and the elongation decreased with Sb content.
Keywords
Sn-base whitemetal; $Cu_6Sn_5$ phase; SbSn cuboids; Sliding bearing; Mechanical properties;
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