Sliding friction behaviour of spark plasma sintered graphite reinforced binderless TiC0.7 N0.3 at elevated temperature

IF 2 Q3 ENGINEERING, MANUFACTURING

Manufacturing Letters Pub Date : 2025-08-01 DOI:10.1016/j.mfglet.2025.06.056

Gadifele Nicolene Mekgwe , Ojo Jeremiah Akinribide , Samuel Olukayode Akinwamide , Peter Apata Olubambi

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Abstract

In this study, high temperature friction behaviour of spark plasma sintered graphite reinforced binderless TiC_0.7N_0.3 based ceramic composite was investigated. Archimedes principle was used to evaluate the relative density of the sintered compact. Subsequently, microstructural characterization was performed prior micro-hardness tests. High temperature friction behaviour of the sintered composites was performed at 5 N and 10 N to determine the wear properties of the ceramic composites. The findings from this study demonstrated that the presence of graphite greatly influenced the properties of binderless TiC_0.7N_0.3 based ceramic composite. Sintered density of 99.6 % was achieved when 1.0 wt% of graphite was used and the frictional behaviour of composite B2 showed reduced coefficient of friction values at both loads. The results obtained on wear tests clearly indicated the lubricating tendency of graphite on TiCN composites.

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火花等离子烧结石墨增强无粘结TiC0.7 N0.3的高温滑动摩擦行为

研究了放电等离子体烧结石墨增强无粘结剂TiC0.7N0.3基陶瓷复合材料的高温摩擦性能。采用阿基米德原理计算烧结坯的相对密度。随后，进行显微硬度测试进行显微结构表征。在5 N和10 N条件下对烧结陶瓷复合材料进行了高温摩擦行为，以确定陶瓷复合材料的磨损性能。研究结果表明，石墨的存在极大地影响了无粘结剂TiC0.7N0.3基陶瓷复合材料的性能。当石墨用量为1.0 wt%时，烧结密度达到99.6 %，复合材料B2在两种载荷下的摩擦性能均表现出摩擦系数的降低。磨损试验结果清楚地表明石墨对TiCN复合材料有润滑倾向。

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