Effect of multilayer graphene as a reinforcement on mechanical properties of WC-6Co cemented carbide

Su, Wuli; Li, Shuai; Sun, Liling

doi:10.1016/j.ceramint.2020.03.084

Cited by 23 publications

(10 citation statements)

References 21 publications

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“…In the study of carbon material as cemented carbide additives, it is found that a certain amount of graphene is able to effectively improve the strength and toughness of cemented carbide. [14][15][16] Carbon nanotubes (CNTs), similar to graphene, are a new type of nano-carbon material. It has low density, high strength, toughness, elastic modulus, and high thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

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Effect of carbon nanotubes additives on mechanical properties of WC–6Co cemented carbide

Zhang

Sun

et al. 2023

Int J Applied Ceramic Tech

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In order to increase the toughness of WC-6Co cemented carbide, different contents of carbon nanotubes (CNTs) were added to the WC-6Co alloy powder to prepare cemented carbide by low-pressure sintering. The results showed that some of the CNTs were embedded between the grains of WC-6Co cemented carbide, which would hinder the growth of WC grain boundary, thus leading to grain refinement. In addition, CNTs inhibited the formation of decarbonized phase and guided the deflection and bridge of crack to hinder the crack extension. With the increase of CNTs content, the density increased at first and then decreased, and the transverse fracture strength increased at first and then decreased. When the content was 0.2 wt.%, the alloy had the best performance. The density of the alloy was 99.67%; the transverse fracture strength was up to 2937.5 MPa, which is about 100% higher than that of cemented carbide without CNTs. The fracture toughness was 9.84 MPa m 1/2 , and the hardness was 1924.8HV 30 .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotubes additives on mechanical properties of WC–6Co cemented carbide

Zhang

Sun

et al. 2023

Int J Applied Ceramic Tech

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“…Junru Yang et al [ 22 ] doped WC(0001)-Co with single-layer GR and double-layer GR and found that both improved the interface bonding property of WC(0001)-Co. Qi Chen et al [ 23 ] fabricated WC-Co-cemented carbide reinforced by GR using an electrostatic adsorption and low-pressure sintering process, and found that GR was uniformly dispersed in the WC-Co matrix. Wuli Su et al [ 24 ] added multilayer GR as an additive into WC-6Co, and found that GR showed enhanced distribution in the Co phase, WC/WC, and WC/Co interfaces.…”

Section: Introductionmentioning

confidence: 99%

Research on Interface Bonding Properties of TiAlSiN/WC-Co Doped with Graphene

Yang

Wang

et al. 2023

Micromachines

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Based on the first-principles method, TiAlSiN/WC-Co interface models with graphene doped into the matrix, coating, and the coating/matrix are constructed. The interface adhesion work is calculated and modeled to study the interface bonding properties from the atomic microscopic point of view. The results show that the interface bonding properties of TiAlSiN/WC-Co can be improved when the matrix is doped with the main surface of intrinsic graphene, and the interface bonding property of TiAlSiNN/WC-Co can be improved when the coating and coating/matrix are doped separately with the main surface of intrinsic graphene or single vacancy defective graphene. Furthermore, the model electronic structures are analyzed. The results show that there exist strong Si/Co and N/Co covalent bonds in the interfaces when the matrix is doped with the main surface of intrinsic graphene, which causes the adhesion work of TiAlSiN/WC/msGR/Co to be greater than that of TiAlSiN/WC-Co. Additionally, when the graphene is doped into the coating, in the interface of TiAlSiN/msGR/TiAlSiNN/WC-Co, there exist strong N/Co covalent bonds that increase the interface adhesion work. Additionally, more charge transfer and orbital hybridization exist in the coating/matrix interface doped with the main surface of intrinsic graphene or single vacancy defective graphene, which explains the essential mechanism that the adhesion work of TiAlSiNN/msGR/WC-Co is greater than that of TiAlSiNN/WC-Co, and the adhesion work of TiAlSiNN/svGR/WC-Co is greater than that of TiAlSiNN/WC-Co.

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“…However, in the system of WC-Co cemented carbide, if the content of WC is increased, the content of Co must be decreased, and vice versa. Therefore, hardness and toughness are contradictory bodies that are ebb and flow [2]. This contradiction in performance limits the application of cemented carbides in harsh environments.…”

Section: Introductionmentioning

confidence: 99%

“…Li et al [6] introduced graphene into WC-Co cemented carbide and found the mechanical properties were increased. Su et al [2] dopped 0.05 wt% graphene into WC-6Co cemented carbide and found the hardness, strength and toughness kept at a high level. Surendranathan [7] added graphene into cemented carbide and the fracture toughness was improved markedly.…”

Section: Introductionmentioning

confidence: 99%

Toughening Effect of Graphene Oxide in WC-Co Cemented Carbide

Gu¹,

Zhang²,

Zhang³

et al. 2023

J. Phys.: Conf. Ser.

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To study the effect of graphene oxide (GO) addition on the microstructure and mechanical properties of WC-Co cemented carbides, sintered bulks were fabricated and characterized. The study shows that the GO added in cemented carbide have insignificant effect on the relative density and the crystalline size, therefore, the higher hardness is maintained. Moreover, the fracture toughness has increased by 29.1%. Bridging is found to be the main toughening mechanism in WC-Co-GO cemented carbide. GO can be expected to be used to prepare cemented carbide with both high hardness and high fracture toughness.

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Effect of multilayer graphene as a reinforcement on mechanical properties of WC-6Co cemented carbide

Cited by 23 publications

References 21 publications

Effect of carbon nanotubes additives on mechanical properties of WC–6Co cemented carbide

Effect of carbon nanotubes additives on mechanical properties of WC–6Co cemented carbide

Research on Interface Bonding Properties of TiAlSiN/WC-Co Doped with Graphene

Toughening Effect of Graphene Oxide in WC-Co Cemented Carbide

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