Effect of aging treatment on microstructure and properties of Cu-Y2O3-Ti composite
Cu-Y2O3-Ti composite powder was prepared by mechanical alloying(MA)and thermal reduction methods using Cu,Y,Ti,and CuO powders as raw materials.Then,the Cu-Y2O3-Ti composite was prepared by spark plasma sintering(SPS)technology,and the composite was subjected to solution treatment at 900℃for 1 h and aging treatment at different temperatures for 2 h.The effect of aging treatment at different temperatures on microstructure and properties of the Cu-Y2O3-Ti composite was studied by means of optical microscope(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD),energy dispersive spectroscopy(EDS)analysis,tensile testing and conductivity measurement instruments.The results show that as the aging temperature increases,the grain size and second phase size of the Cu-Y2O3-Ti composite increase,the conductivity decreases,and the maximum strain and tensile strength first increase and then decrease.The comprehensive properties of the Cu-Y2O3-Ti composite are the best after solution treatment at 900℃for 1 h and aging at 400℃for 2 h,it exhibits good plasticity,and the tensile strength and conductivity are 326.4 MPa and 73.0%IACS,respectively.
Cu-Y2O3-Ti compositedispersion strengtheningsolution and agingmechanical property
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