MgO particle reinforced Cu matrix composites were prepared by stirring-casting method.The microstructure and mechanical properties of the composites were observed and measured by OM and SEM

meanwhile

the phase constituent of the composites was analyzed by X ray.The results show that the strength

hardness of the composites is greatly increased while the electric conductivity is decreased with increase the MgO addition

and strength of the composites is remarkably deteriorated with the MgO addition over a certain value.The strength

electric conductivity and soften temperature of composites is 520 MPa

53.5 MS/m and over 800 ℃

respectively with the 1% MgO addition

showing excellent comprehensive properties.