Effect of hBN content on the friction and wear characteristics of B4C–hBN ceramic composites under dry sliding condition
Source abstract
Abstract
Abstract In order to clarify the effect of hBN on the tribological properties of B 4 C ceramic, dry sliding friction and wear characteristics of hot pressed B 4 C–hBN composites containing different hBN amounts have been investigated in air environment using a pin-on-disc tribometer. Experimental results showed that the friction and wear behaviors of the composites were strongly dependent on the hBN content. An optimum content of hBN for the best tribological behaviors was obtained. The addition of hBN into B 4 C resulted in a significant decrease of the friction coefficient, from 0.586 for B 4 C against B 4 C to 0.179 for B 4 C–20 wt%hBN composite against B 4 C, which could be attributed to the formation of an H 3 BO 3 lubricating film on the worn surface of the B 4 C–hBN specimen. The formation mechanism of the lubricating film is discussed.
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Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Boron and Carbon Nanomaterials Research · Advanced ceramic materials synthesis
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