Abstract
Abstract Al2O3/MoS2 fibrous monolithic ceramics were fabricated with different fiber diameters, in which MoS2 acts as a boundary of the hierarchical structures as well as a solid lubricant. The composites are more structurally reliable as compared to monolithic Al2O3 ceramics, demonstrating typical non-brittle fracture behaviors, and the fracture toughness and work of fracture could reach 4.9 MPa m1/2 and 372 J/m2. Tribological properties of Al2O3/MoS2 fibrous monolithic ceramics in high vacuum were significantly improved and also greatly affected by fiber diameters. The friction coefficient and wear rate for each surface were approximately 0.20 and below 8.0 × 10−6 mm3 N−1m−1, respectively, when the fiber diameters were 400 μm. Tribological performances mainly depended on distribution of MoS2 boundaries and contact characteristics with pairing balls.
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