Microstructure and toughening mechanisms of Al2O3/(W, Ti)C/graphene composite ceramic tool material

Cui, Enzhao; Zhao, Jun; Wang, Xuchao; Sun, Jialin; Huang, Xiantong; Wang, Chao

doi:10.1016/j.ceramint.2018.04.185

Cited by 28 publications

(3 citation statements)

References 25 publications

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“…When the adding amount was more than .2 wt%, graphene would gather into clusters, which leaded to the decrease of the mechanical properties of the composites. Cui et al 7 . investigated the toughening mechanism of graphene nanosheets for Al 2 O 3 /(W, Ti)C composite ceramic cutting tool materials prepared by hot press sintering (HPS), and found that in addition to graphene pullout, crack bridging, crack branching, and crack stopping, there were new toughening mechanisms including graphene fracture and crack guiding.…”

Section: Introductionmentioning

confidence: 99%

“…When the adding amount was more than .2 wt%, graphene would gather into clusters, which leaded to the decrease of the mechanical properties of the composites. Cui et al 7 investigated the toughening mechanism of graphene nanosheets for Al 2 O 3 /(W, Ti)C composite ceramic cutting tool materials prepared by hot press sintering (HPS), and found that in addition to graphene pullout, crack bridging, crack branching, and crack stopping, there were new toughening mechanisms including graphene fracture and crack guiding. Balazsi et al 8 investigated the effect of multilayer graphene and graphene oxide on the properties of Si 3 N 4 ceramic materials prepared by discharge plasma sintering and found that the composites with the addition of multilayer graphene had higher strength and elastic modulus.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and properties of monolayer graphene reinforced Al₂O₃/TiN ceramic tool material

Tian,

Sun,

Yang

et al. 2024

Int J Applied Ceramic Tech

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Al2O3/TiN/graphene ceramic tool materials were prepared by spark plasma sintering technology and the strengthening and toughening mechanisms were studied. The influence of monolayer graphene content on the mechanical properties and microstructure of the composite material were analyzed and the strengthening and toughening mechanisms were researched. The results showed that with an addition of .5 vol.% graphene the mechanical properties of the material reached the best. The bending strength, hardness, and fracture toughness were 624 MPa, 23.24 GPa, and 6.53 MPa·m1/2, respectively. Graphene existed in the forms of few‐layer and multilayer. The toughening mechanism of few‐layer graphene was mainly graphene breaking, and that of multilayer graphene included graphene breaking and pulling‐out. Graphene could contribute to the uniform growth of grains due to the excellent electrical conductivity and the high thermal conductivity. The addition of nano‐TiN introduced many endocrystalline structures and graphene promoted this phenomenon. Micro‐TiN grains made the crack extension show a combination of transgranular fracture, intergranular fracture, crack bridging, and crack deflection, while graphene introduced weak grain interfaces and made the crack appear more branches. The layered graphene made the material fracture change from two‐dimension to three‐dimension.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication and properties of monolayer graphene reinforced Al₂O₃/TiN ceramic tool material

Tian,

Sun,

Yang

et al. 2024

Int J Applied Ceramic Tech

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“…Compared with TiB 2 /TiC without graphene nanosheets, the fracture toughness was increased by 31.7% when only 0.1 wt% of graphene was added. Cui et al [4] prepared Al 2 O 3 /(W,Ti)C/graphene ceramic tool material using hot pressing sintering and found its fracture toughness with only 0.2 wt% graphene was 35.3% higher than that of the sample without graphene.…”

Section: Introductionmentioning

confidence: 99%

Cohesive Element Model for Fracture Behavior Analysis of Al2O3/Graphene Composite Ceramic Tool Material

Zhang

Xiao

et al. 2019

Crystals

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The microstructure model of Al 2 O 3 /graphene (AG) composite ceramic tool material is established based on Voronoi tessellation. The cohesive element method was used to simulate the crack growth of AG. The effect of cohesive parameters at the grain boundary of Al 2 O 3 and graphene on the crack propagation was investigated. The results show that the grain strength of graphene is too high, the crack propagation to graphene grains will be hindered and cannot propagate forward. Cracks tend to spread along the paths where the crack propagation drive force was high and the resistance was low. When the interface strength between Al 2 O 3 and graphene was at the weak interface, the crack propagation path and length were relatively straight and short. The average energy release rate G C is 1.042 × 10 −3 J/m 2 , which is 2.4% higher than that of single-phase Al 2 O 3 ceramic tool materials. However, if the interface strength between Al 2 O 3 and graphene was at the strong interface, the crack propagated along graphene particles for a short distance, consuming a large amount of fracture energy. Furthermore, the crack will deflect around graphene grains, which increases the crack propagation length. The average energy release rate G C is 1.039 × 10 −3 J/m 2 , which is 2% higher than that of single-phase Al 2 O 3 ceramic tool materials.

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Coupling Residual Stress Field to Enhance the Simulation Accuracy of Crack Propagation and Mechanical Responses of High Entropy Ceramics Reinforced by Graphene and Alumina

Cao,

Sun,

et al. 2024

J. of Materi Eng and Perform

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Microstructure and toughening mechanisms of Al2O3/(W, Ti)C/graphene composite ceramic tool material

Cited by 28 publications

References 25 publications

Fabrication and properties of monolayer graphene reinforced Al₂O₃/TiN ceramic tool material

Fabrication and properties of monolayer graphene reinforced Al₂O₃/TiN ceramic tool material

Cohesive Element Model for Fracture Behavior Analysis of Al2O3/Graphene Composite Ceramic Tool Material

Coupling Residual Stress Field to Enhance the Simulation Accuracy of Crack Propagation and Mechanical Responses of High Entropy Ceramics Reinforced by Graphene and Alumina

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Microstructure and toughening mechanisms of Al2O3/(W, Ti)C/graphene composite ceramic tool material

Cited by 28 publications

References 25 publications

Fabrication and properties of monolayer graphene reinforced Al2O3/TiN ceramic tool material

Fabrication and properties of monolayer graphene reinforced Al2O3/TiN ceramic tool material

Cohesive Element Model for Fracture Behavior Analysis of Al2O3/Graphene Composite Ceramic Tool Material

Coupling Residual Stress Field to Enhance the Simulation Accuracy of Crack Propagation and Mechanical Responses of High Entropy Ceramics Reinforced by Graphene and Alumina

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Fabrication and properties of monolayer graphene reinforced Al₂O₃/TiN ceramic tool material

Fabrication and properties of monolayer graphene reinforced Al₂O₃/TiN ceramic tool material