Effect of graphene nano-platelet addition on the microstructure and spark plasma sintering kinetics of zirconium diboride

Shanbhog, Nagaraj; Vasanthakumar, K.; Arunachalam, N.; Bakshi, Srinivasa Rao

doi:10.1016/j.ijrmhm.2019.104979

Cited by 13 publications

(7 citation statements)

References 29 publications

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“…However, an excessive GNPs content will reduce the flexural strength and fracture toughness of the composites, 42 as the GNPs will form agglomerates, which decrease the energy required to extract them with increase in the number of graphene layers 14 . The addition of GNPs can improve densification 43,44 . The relative density gradually increased with increase in the GNPs content, but the Vickers hardness constantly decreased 45 .…”

Section: Resultsmentioning

confidence: 99%

“…14 The addition of GNPs can improve densification. 43,44 The relative density gradually increased with increase in the GNPs content, but the Vickers hardness constantly decreased. 45 When the sintering temperature was 1400 • C, the flexural strength of YAG0.1 and fracture toughness of YAG0.4 reached the maximum values of 910 ± 11 MPa and 12.95 ± .22 MPa m 1/2 , respectively.…”

Section: Influence Of Amount Of Gnps Addition On Mechanical Performan...mentioning

confidence: 99%

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Mechanical performance and microstructure of 3Y‐TZP/Al₂O₃/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method

Zhang

Xiao

Chen

et al. 2023

Int J Applied Ceramic Tech

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In this study, 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP)/Al 2 O 3 /graphene nanoplatelets (GNPs) medical ceramic materials for manufacturing surgical scalpels were sintered in vacuum in an SPS-625HF furnace. The mechanical performances and microstructures of the composites were investigated, and the influence mechanisms of the sintering temperature and amount of added GNPs were studied. During the sintering process at 1400 • C and 30 MPa for 5 min, the added GNPs enhanced the mechanical properties of the 3Y-TZP/Al 2 O 3 composites. The results showed that the composite with .1 wt.% GNPs had 6.4% (910 ± 11 MPa) higher flexural strength than 3Y-TZP/Al 2 O 3 . The composite with .4 wt.% GNPs had 38.7% (12.95 ± .22 MPa m 1/2 ) greater fracture toughness than 3Y-TZP/Al 2 O 3 . The main toughening mechanisms of 3Y-TZP/Al 2 O 3 /GNPs were crack bridging, crack deflection, crack branching, GNPs bridging, transgranular fracture structures, and phase transformation of t-ZrO 1.95 . The two-stage densification displacement curve appeared at the optimal sintering temperature of the materials, and the 3Y-TZP/Al 2 O 3 /GNPs composites with a two-stage densification displacement curve had excellent mechanical properties. The added GNPs can inhibit the grain growth during the sintering process, thereby refining the zirconia grains. With the increase in GNPs content, the grain size and flexural strength of the composites decreased gradually. However, higher content of GNPs was beneficial to improve the relative density and thermal diffusivity of 3Y-TZP/Al 2 O 3 /GNPs composite material.

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Section: Resultsmentioning

confidence: 99%

Section: Influence Of Amount Of Gnps Addition On Mechanical Performan...mentioning

confidence: 99%

Mechanical performance and microstructure of 3Y‐TZP/Al₂O₃/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method

Zhang

Xiao

Chen

et al. 2023

Int J Applied Ceramic Tech

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“…With respect to the manufacture of this type of ceramics, known as "traditional ceramics", three steps can be highlighted in the process of obtaining them: first, the selection and mixing of powders; second, shaping; and third, densification. Each of these steps has been improved over time, and the densification methods and their relationship with the final properties of the material have also been extensively studied in electroelectronic ceramics [21], [22], [23], [24].…”

Section: History Of Densification Processesmentioning

confidence: 99%

Review: Densification process of ceramic materials

2020

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Ceramics has played an important role in the technological and socio-economic development of humanity, so that they can be used to identify different historical periods of the humanity. Babylonians, Greek, Andalusian, among other cultures have used the ceramics and developed several methods to improve the products obtained by pottery. Generally, the ceramics can be divided into two big areas, traditional and structural ceramics. Ceramics manufactured with clay, Traditional Ceramics, currently they are being studied in the improvement of structural, abrasives, cement, refractory, among other materials. On the other hand, the ceramics developed as a result of new technologies and the exploitation of natural resources, Structural Ceramics, they are a great interest for the science of ceramic materials due to the development of ceramics with properties that incorporate attributes of various materials in only one material, in addition to the contributing to the phenomenological study at a scientific level. Advances in the processes of densification and doping of these materials have allowed to obtain ceramics with high mechanical resistance, high hardness, high resistance to attrition and corrosion, good chemical and thermal stability; features that have directly influenced the type of applications such as bulletproof vests, transparent shields, high temperature electrical insulators, superconducting devices, electronic materials among other applications

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“…Nagaraj et al [ 17 ] found that fracture and pull-out of graphene would lead to more crack deflection and crack branching. The study by Yin et al [ 18 ] showed that the network structure formed by graphene in the ceramic matrix can enhance the interface bonding, leading to more crack bridging and deflection.…”

Section: Introductionmentioning

confidence: 99%

“…Ahmad et al [16] used nano zirconia and graphene nano-sheets to toughen alumina ceramic composite, and it was reported that the fracture toughness increased by 155% and the microhardness increased by 17% compared with the monolithic alumina ceramic. Nagaraj et al [17] found that fracture and pull-out of graphene would lead to more crack deflection and crack branching. The study by Yin et al [18] showed that the network structure formed by graphene in the ceramic matrix can enhance the interface bonding, leading to more crack bridging and deflection.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Characteristic Size and Content of Graphene on the Crack Propagation Path of Alumina/Graphene Composite Ceramics

Chen

Xiao

et al. 2021

Materials

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In this paper, the Voronoimosaic model and the cohesive element method were used to simulate crack propagation in the microstructure of alumina/graphene composite ceramic tool materials. The effects of graphene characteristic size and volume content on the crack propagation behavior of microstructure model of alumina/graphene composite ceramics under different interfacial bonding strength were studied. When the phase interface is weak, the average energy release rate is the highest as the short diameter of graphene is 10–50 nm and the long diameter is 1600–2000 nm. When the phase interface is strong, the average energy release rate is the highest as the short diameter of graphene is 50–100 nm and the long diameter is 800–1200 nm. When the volume content of graphene is 0.50 vol.%, the average energy release rate reaches the maximum. When the velocity load is 0.005 m s−1, the simulation result is convergent. It is proven that the simulation results are in good agreement with the experimental phenomena.

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Effect of graphene nano-platelet addition on the microstructure and spark plasma sintering kinetics of zirconium diboride

Cited by 13 publications

References 29 publications

Mechanical performance and microstructure of 3Y‐TZP/Al₂O₃/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method

Mechanical performance and microstructure of 3Y‐TZP/Al₂O₃/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method

Review: Densification process of ceramic materials

Effect of the Characteristic Size and Content of Graphene on the Crack Propagation Path of Alumina/Graphene Composite Ceramics

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Effect of graphene nano-platelet addition on the microstructure and spark plasma sintering kinetics of zirconium diboride

Cited by 13 publications

References 29 publications

Mechanical performance and microstructure of 3Y‐TZP/Al2O3/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method

Mechanical performance and microstructure of 3Y‐TZP/Al2O3/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method

Review: Densification process of ceramic materials

Effect of the Characteristic Size and Content of Graphene on the Crack Propagation Path of Alumina/Graphene Composite Ceramics

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Product

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Mechanical performance and microstructure of 3Y‐TZP/Al₂O₃/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method

Mechanical performance and microstructure of 3Y‐TZP/Al₂O₃/GNPs medical ceramic surgical scalpel material prepared through SPS–HF dual sintering method