Effect of SPS Sintering Temperature on Organization and Mechanical Properties of ACNs/Ti Composite
ACNs(amorphous carbon nanoparticles)/Ti composites were prepared by spark plasma sintering(SPS),and the microstructures,phase compositions and mechanical properties of ACNs/Ti composites at different sintering temperatures were characterised using scanning electron microscope,X-ray diffractometer,optical microscope and electronic universal testing machine.The results show that at lower sintering temperature(800℃),although the unreacted ACNs will contribute to the strength of the composites,the weak interfacial bonding with the matrix will lead to serious decrease in the plasticity of the composites.At higher sintering temperature(1000℃),the TiC particles that are fully reacted with the matrix are larger in size after overgrowth,and this phenomenon causes a decrease in the strength of the material.When the sintering temperature is 900℃,the ACNs fully react with the Ti matrix to produce TiC particles.The TiC particles are distributed along the perimeter of the matrix particles,forming a quasi-continuous mesh structure,and the ACNs/Ti composite has the best strong-plasticity match,the tensile strength,yield strength and elongation are 648.19 MPa,551.02 MPa and 36.19%,respectively.
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