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| Microstructure and Properties of in-Situ Synthesized Ti(C,N)/TC4 Composites by SPS |
| ZHANG Lan, CHEN Zixuan, MA Huizhong, ZHANG Jidong |
| Zhengzhou University, Zhengzhou 450000, China |
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Abstract Ti(C,N)/TC4 composites were prepared by spark plasma sintering using graphite carbon nitrification (g–C3N4 ) as nitrogen sources and carbon sources. By changing the addition amount of g–C3N4 , the composites with different Ti(C,N) contents were prepared, and the microstructure, hardness and tribological properties of the composites were studied. The results show that Ti(C,N) prepared in-situ is granular, and the overall distribution is gridded, and the interface of Ti(C,N) is well combined with the TC4 matrix. With the increase in the amount of g–C3N4 added, the hardness of the composite material continues to increase, and the friction resistance first increases and then decreases. The composite material prepared by adding mass fraction 5% g–C3N4 has higher hardness and excellent wear resistance. The hardness is 627.68HV, which is 44.4% higher than the pure TC4 titanium alloy sintered sample. The friction coefficient and wear amount are 0.2608 and 0.056 mm3 , respectively, which are 29.3% and 61.6% higher than that of TC4 sintered samples.
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2022, 
