Mechanical properties of Ti₃SiC₂ particulate reinforced copper prepared by hot pressing of copper coated Ti₃SiC₂ and copper powder

Abstract

The compound Ti₃SiC₂ is a promising reinforcement for copper, but at a high volume content of Ti₃SiC₂, densification of Cu/Ti₃SiC₂ composites becomes difficult. To improve the densification behaviour and microstructure of Cu/Ti₃SiC₂ composites, Ti₃SiC₂ particulates were coated with a layer of copper by an electroless plating method before being incorporated into the copper matrix. Results demonstrated that, compared with uncoated Ti₃SiC₂ reinforced copper, copper coated Ti₃SiC₂ reinforced composites exhibit both high density and a homogeneous distribution of Ti₃SiC₂ within the copper matrix. The precoated layer of copper prevents direct contact and agglomeration of Ti₃SiC₂ particulates. Owing to the improved density and microstructure, the mechanical properties of Cu/Ti₃SiC₂ composites are also enhanced. Mechanical property investigation revealed that a significant strengthening effect is observed for Cu/Ti₃SiC₂ composites at both room and high temperatures.

Keywords:

• METAL MATRIX COMPOSITES
• PARTICULATE COMPOSITES
• COPPER ALLOYS
• TITANIUM COMPOUNDS
• MECHANICAL PROPERTIES