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Oxide dispersion strengthened copper alloy is a better overall performance and a wider range of applications , high strength and high conductivity copper alloy material one . It still has a high strength at high temperatures , hardness and electrical conductivity , thermal conductivity , and is widely used in the field of mechanical, electrical , aerospace , and military . Experiments using powder metallurgy , spark plasma sintering method prepared La 2 O 3 / Cu composite materials . Compacting pressure , sintering temperature and other process parameters affect the organization and performance of their composite structure , to determine the optimum parameters for preparing the composite . Different proportions of La 2 O 3 / Cu density , hardness , strength , conductivity and other properties of the composites were tested using optical microscopy (OM ) X-ray diffraction (XRD), transmission electron microscopy ( TEM ) , scanning electron microscopy ( SEM ) , field emission scanning electron microscope ( FE - SEM ) , etc. La 2 O 3 / Cu composite microstructure observation and analysis organization . The experimental results show that 1.3 wt% La 2 O 3 < / sub > / Cu composite optimal parameters : compacting pressure of 350 MPa , sintering temperature of 900 oC , its microstructure and performance presented anisotropic . FESEM, TEM, SEM composite elements La, Sn, O, Cu , La, O in La 2 O 3 form of existence and partial poly- dispersed particles in the Cu-Cu interface . The interface between the particles is clearly better combination . La 2 O 3 / Cu composite density of approximately 8.8 × 103 kg/m3 , close to the theoretical density . With La 2 O 3 content increases , the La 2 O 3 < / sub > / Cu composite microhardness , tensile strength, compressive strength increases. The la 2 O 3 / Cu composite axial conductivity is slightly larger than the radial conductivity ; With La 2 O < sub> 3 content increases the La 2 O 3 / Cu composite conductivity decreased dramatically. When the content is increased to 1.3wt% , the electrical conductivity of approximately 70% IACS. Comprehensive the La 2 < / sub> O 3 content on mechanical properties and electrical conductivity of 1.3 wt% La 2 O 3 / Cu to better meet the demand for copper-based composite applications .
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