Abstract
Abstract The present research reports improvement in mechanical performance of Copper-Tin(Cu-Sn) composites due to the addition of hard Si3N4 particles as reinforcement. Two-step stir casting technique was adopted to prepare Si3N4-reinforced Cu-Sn based composites. The uniform distribution of the reinforcement in the matrix was ensured by SEM morphology and energy-dispersive X-ray (EDAX) spectrum of the developed composites. Brinell hardness test and tension test were used to estimate the hardness and tensile strength of the composite. Si3N4 reinforcing materials added to the extent of 7.5% by wt. to Cu-Sn matrix enhanced hardness by 41% and UTS by 33%, YS by 29% and showed 23% decrement in ductility. Thus a comparison of Si3N4-reinforced Cu-Sn based composites with base metal has shown that considerable improvement in tensile properties such as UTS and YS and hardness if reinforcing material is added to the extent of 7.5%.
Highlights
Copper has exceptionally useful properties such as good electrical and thermal conductivity, corrosion resistance and can be readily alloyed
A comparison of Si3N4-reinforced Cu-Sn based composites with base metal has shown that considerable improvement in tensile properties such as ultimate tensile strength (UTS) and yield strength (YS) and hardness if reinforcing material is added to the extent of 7.5%
ASiN composite showed 33% increase in UTS, 29% increase in YS and 23% decrement in percentage elongation (PE)
Summary
Copper has exceptionally useful properties such as good electrical and thermal conductivity, corrosion resistance and can be readily alloyed. Effect of reinforcement content on the hardness, strength [19] and adhesive wear behaviour of Cu10Sn5Ni/Si3N4 composites were studied and results reported the improved strength and toughness when compared to pure Cu [20, 21]. The desirable properties of bearings are high thermal conductivity to dissipate heat generated due to friction, high corrosion resistance, high fatigue, tensile, shear, compressive strength and wear resistance and be able to bear shocks and vibrations. An attempt is made to evaluate the influence of addition of Si3N4 as reinforcement to Cu-Sn matrix Composites on mechanical properties of the composite
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