Effect of sintering temperature on microstructure and properties of Ti-TiC/Ti laminated composites
The addition of uniformly distributed reinforcing phases into titanium alloys can improve their strength and stiffness,but inevitably leads to a decrease in plasticity and toughness.Taking inspiration from the structure and composition of natural pearl shells,pure titanium sheets were used as the metal layer material,titanium powder and carbon powder were used as the enhancement layer material,Ti-TiC/Ti laminated composites were successfully prepared by spark plasma sintering method,and the influence of sintering temperature on mechanical properties of the Ti-TiC/Ti laminated composites was investigated.The results show that when the molar ratio of the mixed material in the enhancement layer is Ti∶C=1.1,the sintering temperature is difficult to control.When the molar ratio of Ti∶C=1.2 and the sintering temperature is 1100 ℃,the Ti-TiC/Ti laminated composites have a uniform microstructure,good layered structure,and the best bending strength performance,reaching 819.8 MPa.The hardness distribution in the enhancement layer is also uniform.When the sintering temperature is 1150 ℃,the bending strength of the composites decreases.
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