High Pressure Synthesis of Al2o3-Cbn-Hbn Self-Lubricating Ceramic

Analysis of mechanical properties of Al2O3‐cBN‐hBN composites and identification of main influencing factors

“…7,13 It is also needed to enhance the selflubricating properties by increasing the elastic modulus, relative density, or even reducing the hardness and toughness to improve the release efficiency of the self-lubricating particles. 6,14 This is quite different from the conventional theory of enhancing wear resistance by pursuing the ultimate mechanical properties of ceramic. Therefore, reasonable adjustment of mechanical properties and the content of lubricating components to ensure the balance between mechanics and self-lubricating properties is necessary to improve the wear resistance of ceramics.…”

“…[10][11][12] As a result, the mapping relationship between mechanical properties, self-lubricating properties, and tool wear rate is not unique. 6 To guarantee the optimal cutting performance of self-lubricating tools, it is necessary to appropriately sacrifice the mechanical properties of materials according to the workpiece material with the actual cutting working conditions to ensure the balance between mechanical and self-lubricating properties.…”

“…In the previous study, frictional wear tests were used to demonstrate that Al 2 O 3 -cBN-hBN ceramics have excellent self-lubricating properties. 6 However, the mapping relationship of ceramic mechanical properties with sintering thermodynamic conditions and component content has not been fully established. In this work, Al 2 O 3 -cBN-hBN self-lubricating ceramics were synthesized by the high-pressure sintering method.…”

“…The high‐pressure synthesis method provides an effective solution for fabricating self‐lubricating ceramics with excellent mechanical properties. In a previous study, Al 2 O 3 ‐cBN‐hBN composites with excellent mechanical properties were synthesized using a high‐pressure sintering method 6 . The results of a series of frictional wear and mechanical properties measurements and tests have shown that the mechanical properties of the synthetic Al 2 O 3 ‐cBN‐hBN are even higher than those of conventional Al 2 O 3 ‐based ceramics while ensuring excellent self‐lubricating properties.…”

“…In addition, the self‐lubricating properties are influenced by multiple factors such as the cutting force, the material properties of the workpiece, the mechanical properties of the tool, and the wear morphology 10–12 . As a result, the mapping relationship between mechanical properties, self‐lubricating properties, and tool wear rate is not unique 6 . To guarantee the optimal cutting performance of self‐lubricating tools, it is necessary to appropriately sacrifice the mechanical properties of materials according to the workpiece material with the actual cutting working conditions to ensure the balance between mechanical and self‐lubricating properties.…”