An advanced self‐lubricating ceramic composite with the addition of core‐shell structured CaF 2 @Al 2 O 3 powders
Source abstract
Abstract
Abstract Aiming to improve the performance of self‐lubricating ceramic tools, an advanced self‐lubricating ceramic composite was developed. Core‐shell structure CaF 2 @Al 2 O 3 powders were synthesized by liquid‐phase non‐uniform nucleation method. Al 2 O 3 /Ti(C,N)/CaF 2 @Al 2 O 3 composite made by adding CaF 2 @Al 2 O 3 powders exhibited notable improvements in microstructure and mechanical properties as compared with Al 2 O 3 /Ti(C,N)/CaF 2 composite made by adding uncoated CaF 2 powders. The core‐shell coated self‐lubricating ceramic tool with different content of CaF 2 @Al 2 O 3 was designed and prepared by hot pressing sintering process. The results show that when the content of CaF 2 @Al 2 O 3 is 10 vol%, The composite has the best mechanical properties, the flexural strength, and the fracture toughness and the hardness is 680 MPa, 6.50 MPa·m 1/2 , and 17.29 GPa. Compared with the tool material with only CaF 2 solid lubricant added, the above performances were increased by 8.91%, 29.48%, and 14.50% respectively. The influence of different CaF 2 @Al 2 O 3 content on the physical and mechanical properties and microstructure of the tool material was analyzed.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mechanical and Automotive Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Key Laboratory of Advanced Manufacturing and Measurement and Control Technology for Light Industry in Universities of Shandong Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Funding
Natural Science Foundation of Shandong Province
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