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Comparison of wear and friction properties of a nickel aluminum bronze (CuAl10Ni5Fe4) and Tın bronze (CuSn11)

Turhan Ürün Koçak , Harun Yanar , Gençağa Pürçek , Feriha Birol, “Comparison of wear and friction properties of a nickel aluminum bronze (CuAl10Ni5Fe4) and Tın bronze (CuSn11)  ” 2. Uluslar arası Demir Çelik Sempozyumu (IISS’15), 1-3 Nisan 2014, Karabük, Türkiye

Abstract:  Due to their high corrosion and wear resistance, tin bronzes and nickel-aluminum bronzes are among the most important copper alloys. Because of their wear resistance as well as lubricating properties, Sn bronzes are the preferred copper alloy in many tribological applications. Ni-Al bronzes are accepted as perfect material for applications requiring superior wear and high corrosion resistance under heavy loads. Despite its higher price compared to Sn bronzes, due to its higher hardness and lower density, the Ni-Al bronze listed in Sağlam Metal's product catalogue is recommended as an alternative to Sn bronzes in some applications. In this study we set out to examine the friction and wear properties of a Ni-Al bronze with CuAl10Ni5Fe4 nominal compound and a Sn bronze with CuSn11 nominal compound under dry atmospheric conditions and to compare the results. For this purpose, the microstructures of alloys produced with certain chemical compounds are examined under optical and/or SEM microscope, while their mechanical properties are measured with standard tensile and hardness tests. The wear and abrasion resistance is measured with a pin-on-disk based (UTS T10/20) test system. Based on test results, the abrasion (volume) loss, changes in the coefficient of friction and wear mechanisms in each alloy was determined and compared. As a preliminary result it has been observed that the CuSn11 bronze is better than the CuAl10Ni5Fe4 bronze in terms of wear behavior, but that the coefficient of friction is lower in the CuAl10Ni5Fe4 bronze. That despite its low hardness value the CuSn11 bronze shows less wear than the CuAl10Ni5Fe4 bronze in low and medium load conditions can be explained with the effective wear mechanism of those alloys. 

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