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Effect of Zirconium Diboride and Titanium Diboride on the Structure and Properties of 316L Steel-Based Composites

Materials, ISSN: 1996-1944, Vol: 16, Issue: 1
2023
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The effect of zirconium diboride (ZrB) and titanium diboride (TiB) on the microstructure as well as the physical, mechanical, and tribological properties of composites based on 316 L steel is presented. Each reinforcing phase was added to the base alloy in the amount of 5 wt% and 10 wt%. The composites were fabricated by the SPS process (Spark Plasma Sintering). The results show that the weight fraction of the reinforcing phase affects the physical, mechanical, and tribological properties of the sintered composites. The sintered materials were characterized by a very high level of density. The addition of TiB has proved to be effective in increasing the hardness and compressive strength of the composites. The hardness of the composites with the addition of 10% TiB increased by 100% compared to the hardness of sintered 316L steel. It was found that introducing ZrB to the steel matrix significantly improved the wear resistance of the composites. The results showed that compared to 316L steel with the wear rate of 519 × 10 mm/Nm, the wear rate of the composites containing 10% ZrB decreased more than twice, i.e., to 243 × 10 mm/Nm.

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