Microstructure and performance optimization of Al2O3/TiC/TiB2/h-BN@Al2O3 self-lubricating ceramic tool materials

Chen, Zhaoqiang; Yang, Yan; Zhang, Guangfu; Chen, Hui; Tian, Congfeng; Xiao, Guangchun; Yi, Mingdong; Zhang, Jingjie; Zhou, Tingting; Xu, Chonghai

doi:10.1016/j.ceramint.2023.08.062

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…The operation is iterated based on a predetermined number of MC steps until all MCS are completed. The accuracy of this MC analysis method has been researched and verified by our research group 29 …”

Section: Methodsmentioning

confidence: 87%

Design, optimization, and verification of self‐lubricating ceramic tool microstructure by MC method

Zhu,

Zhang,

Chen

et al. 2024

Int J Applied Ceramic Tech

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The computer‐aided analysis of microstructure evolution during the sintering process of self‐lubricating ceramic tools can unveil the underlying sintering mechanism and optimize experimental parameters. In this study, a novel self‐lubricating ceramic tool material, Al2O3/SiC/h‐BN@Al2O3, was fabricated with Al2O3 as the matrix, SiC as the reinforcement phase, and h‐BN@Al2O3 as the solid lubricant. The Monte Carlo (MC) method was employed to construct a model of self‐lubricating ceramic tool material, consisting of Al2O3/SiC/h‐BN@Al2O3. Subsequently, the sintering process was analyzed to investigate the influence of particle size and content of reinforced SiC, as well as the content of coated solid lubricant h‐BN@Al2O3, sintering pressure, and temperature on the microstructure of the tool. Optimal composition and sintering parameters were determined: 3 vol% for SiC additive amount with a particle size of 0.05 μm; 5 vol% for h‐BN@Al2O3 additive amount; and an optimal sintering temperature at 1650°C. The development of self‐lubricating ceramic tool materials, Al2O3/SiC/h‐BN@Al2O3, was realized through the employment of the aforementioned parameters. Their mechanical properties and microstructure were comprehensively characterized. The bending strength, fracture toughness, and Vickers hardness of the experimentally‐prepared Al2O3/3 vol%SiC/5 vol%h‐BN@Al2O3 self‐lubricating ceramic tool material were determined to be 722.42 MPa, 6.5 MPa·m1/2, and 20.65 GPa, respectively.

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Section: Methodsmentioning

confidence: 87%

Design, optimization, and verification of self‐lubricating ceramic tool microstructure by MC method

Zhu,

Zhang,

Chen

et al. 2024

Int J Applied Ceramic Tech

Self Cite

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“…Two traditional methods of toughening homogeneous ceramic cutting tools are the elimination of the original defects, 4,5 and the addition of reinforcing toughened phases. [6][7][8] Nowadays, a breakthrough was developed by using the idea of bionics to combine the toughening mechanism of shells and the high-speed cutting advantage of ceramic cutting tools. [9][10][11][12] Many reports were devoted to the investigation of mechanical properties of laminated ceramic cutting tools, such as fracture resistance, 13 work of fracture, 14 Vickers hardness, 15 friction characteristics, 16 and crack self-healing.…”

Section: Introductionmentioning

confidence: 99%

“…Ceramic cutting tools are notable for their excellent machinability, 1–3 but their brittleness and low fracture toughness limit further development. Two traditional methods of toughening homogeneous ceramic cutting tools are the elimination of the original defects, 4,5 and the addition of reinforcing toughened phases 6–8 …”

Section: Introductionmentioning

confidence: 99%

Fabrication, microstructure, and mechanical properties of novel three‐layer structured bionic ceramic cutting tools

Li,

Huang,

Liu

et al. 2024

Int J Applied Ceramic Tech

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Ceramic cutting tools have low fracture toughness owing to brittleness. To improve the fracture toughness and flexural strength of ceramic cutting tools, the growth model of SiCw during the sintering process was established by the laminated structure and anisotropy of growth of bionic shells. Furthermore, a theoretical model of sintering parameters and total fracture toughness was achieved. Then, the dispersion process of SiCw was improved to enhance the homogeneity of the mixed powders further. Finally, a novel three‐layer structured bionic ceramic cutting tool was fabricated by hot‐pressing. The effects of sintering temperature, holding time, and sintering pressure on the mechanical properties and microstructure of bionic ceramic cutting tools were investigated. The results showed that the flexural strength (three point bending), fracture toughness (indentation method), and Vickers hardness of the three‐layer structured bionic ceramic cutting tool with excellent dispersed were 735 ± 34 MPa, 5.68 ± 0.06 MPa·m1/2, and 19.66 ± 0.12 GPa, respectively. The microstructure of the fracture revealed that the fracture mechanism of the bionic ceramic cutting tool was a mixture of intergranular fracture, transgranular fracture, whisker pull‐out, whisker fracture, forked crack, crack deflection, crack bridging, zig‐zag crack, and crack termination. The accuracy of the total fracture toughness model was reliable.

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Design of TiC intergranular-dispersed Al2O3 composites via in situ and two-step sintering with enhanced mechanical and electrical properties

Shi

2024

Materials Science and Engineering: A

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Microstructure and performance optimization of Al2O3/TiC/TiB2/h-BN@Al2O3 self-lubricating ceramic tool materials

Cited by 4 publications

References 27 publications

Design, optimization, and verification of self‐lubricating ceramic tool microstructure by MC method

Design, optimization, and verification of self‐lubricating ceramic tool microstructure by MC method

Fabrication, microstructure, and mechanical properties of novel three‐layer structured bionic ceramic cutting tools

Design of TiC intergranular-dispersed Al2O3 composites via in situ and two-step sintering with enhanced mechanical and electrical properties

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