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Experimental study demonstrates enhanced wear resistance in carbon-coated 7075 aluminum composites, indicating a viable method for creating durable low-friction materials.
APC/7075Al composites were fabricated via hydrothermal carbonization coating of powders combined with vacuum hot-press sintering. The effects of glucose concentration on the microstructure, density, hardness and tribological properties were investigated. Minor Al C atomic interdiffusion generate a well-bonded Al-APC interfacial layer. The composite prepared at a glucose concentration of 0.3 mol/L achieves the optimal wear performance, with a wear rate of 2.97 × 10 −6 mm 3 /(N·m) and a friction coefficient of 0.247, which are 70.6% and 41.3% lower than those of pure 7075Al, respectively. Adhesive wear is the dominant wear mechanism, and the remarkable improvement in wear resistance originates from the uniformly dispersed APC solid lubricating film formed on worn surfaces.
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Xu et al. (2026) studied this question.
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