Research on Preparation of Heterogeneous Configuration TiB Reinforced Titanium Matrix Composites and Its Microstructure,Performance
Taking AlB2 powder as the boron source,pure titanium(TA1)and Mo powders as the matrix,heterogeneous TiB reinforced Ti matrix composite were prepared by vacuum hot pressing sintering.Through microstructure characterization and mechanical properties testing,the influence of sintering time and sintering temperature on the microstructure and mechanical properties of the composite were systematically investigated.The results show that the sintering process parameters have no significant influence on the morphology and distribution of TiB reinforcements.With the extension of sintering time,the density and grain size of the composites increase,and the tensile strength,compressive strength and microhardness of the composite first increase and then decrease.With the increase of sintering temperature,the tensile strength,compressive strength and matrix microhardness of the composite also increase.When the sintering temperature is 1300℃,the sintering time is 60 min,the composite has high density and strength due to sufficient element diffusion,and the tensile strength,compressive strength and α-Ti matrix's hardness reach 922.1 MPa,1960.4 MPa and 425 HV,respectively.
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