Mechanical properties and microstructure of Al2O3/TiB2 and Al2O3/TiB2/GNPs ceramic tool materials prepared by spark plasma sintering

Chen, Benshuai; Xiao, Guangchun; Yi, Mingdong; Zhang, Jingjie; Zhou, Tingting; Chen, Zhaoqiang; Xu, Chonghai

doi:10.1016/j.ceramint.2021.01.015

Cited by 19 publications

(8 citation statements)

References 37 publications

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“…Liu et al [ 21 ] used zirconium quartz and bauxite as raw materials, and added CaO, Y 2 O 3 , and MgO as additives, and prepared zirconia reinforced mullite ceramics with a compressive strength of up to 620 MPa by hot pressing sintering. Chen et al [ 22 ] used mullite as raw material, coarse and fine ZrO 2 (Y 2 O 3 ) as admixtures, and prepared zirconia reinforced mullite ceramics with a compressive strength of 378 MPa by isostatic pressing. Hussien et al [ 23 ] used fused mullite, α -Al 2 O 3 micropowder and semistable zirconia as raw materials, polycrystalline alumina fiber as admixture, and sintered at 1500°C for 3 h to prepare a composite material with good dimensional stability and flexural strength.…”

Section: Results Analysismentioning

confidence: 99%

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Zhang

2022

International Journal of Analytical Chemistry

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Because of its excellent properties, mullite porous ceramics are widely used in thermal insulation materials, catalyst carriers, gas-liquid filtration, separation materials, etc. At the same time, zirconia not only has the advantages of high melting point, good chemical stability, and high strength but also can significantly improve the strength of ceramics through phase transformation and particle dispersion in the matrix and is widely used in the reinforcement of ceramics. In this paper, using mullite powder as the raw material, Al2O3 and SiO2/ZrSiO4 as the starting material for the mullite self-bonding phase, and AlF3·3H2O, ZrO2, and Y2O3 as additives, the zirconia-reinforced mullite was prepared by the foaming-injection method. The volume density, linear shrinkage rate, microstructure, room temperature, etc. of nanozirconia-reinforced mullite porous ceramics were studied by the amount of the foaming agent, the amount of mullite self-bonding phase powder, the type and amount of additives, etc. Effects of mechanical properties and thermal conductivity were also analyzed. The research results show that zirconia-reinforced mullite porous ceramics were prepared with mullite powder and 6 wt% AlF3·3H2O as raw materials, and ZrO2 and Y2O3 as additives. Adding an appropriate amount of ZrO2 and Y2O3 can significantly improve the mechanical properties of porous ceramics. When ZrO2 is 6 wt% and Y2O3 is 8 wt%, the porosity is 66.4% and the flexural strength and compressive strength of porous ceramics with a large pore size of 168 μm can reach 14.3 MPa and 36.3 MPa, respectively, which are obviously better than the strength of mullite porous ceramics without adding Y2O3 (flexural strength 11.3 MPa, nanocompressive strength 29.4 MPa).

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Section: Results Analysismentioning

confidence: 99%

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Zhang

2022

International Journal of Analytical Chemistry

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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%

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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“…Nickel and GNPs enhanced the densification of TiB 2 /TiC composites corporately, and nickel was helpful to improve the toughening effect of GNPs 9 . The fracture toughness of Al 2 O 3 /TiB 2 /GNPs composite increased by 41.6% and reached the maximum of 7.35 ± .23 MPa m 1/2 , and its flexural strength reached 661 ± 16 MPa compared to those of Al 2 O 3 /TiB 2 composite 10 …”

Section: Introductionmentioning

confidence: 92%

“…9 The fracture toughness of Al 2 O 3 /TiB 2 /GNPs composite increased by 41.6% and reached the maximum of 7.35 ± .23 MPa m 1/2 , and its flexural strength reached 661 ± 16 MPa compared to those of Al 2 O 3 /TiB 2 composite. 10 Some particles are melt due to oxygen combustion and impact the matrix driven by compressed gas in high velocity oxy fuel (HVOF) spraying. 11 The plastic deformation caused by high-speed impacting reduced the pores in the coating and improved the adhesion between the coating and the substrate.…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior of GNPs doped Al₂O₃ coating fabricated by SHVOF thermal spraying on cemented carbide

Sun

Liu

et al. 2022

Int J Applied Ceramic Tech

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This paper aims to experimentally investigate the effect of graphene nanoplatelets (GNPs) doped Al 2 O 3 coating deposited on the surface of cemented carbide substrate using suspension high velocity oxy fuel (SHVOF) thermal spraying technique. Scanning electron microscopy was applied to characterize GNPs doped Al 2 O 3 feedstock, the surface morphologies of cemented carbide before and after spraying, and the wear track morphology of cemented carbide after wear tests. The phases of GNPs doped Al 2 O 3 feedstock, uncoated and coated cemented carbide were analyzed by X-ray diffraction. The existence of GNPs was analyzed by Raman spectroscopy. A mixture of un-molten and molten splats formed on the surface of cemented carbide substrate after SHVOF thermal spray. The average coefficient of friction (CoF) of coated samples was slightly lower than that of uncoated samples, which might be due to the friction-reduction effect of GNPs. The wear rate of the samples was one order of magnitude higher than that of the alumina ball, showing that the wear of samples was the main wear between the friction couples. The wear mechanism of uncoated sample was mainly fatigue spalling, and that of cemented carbide substrate coated with GNPs doped Al 2 O 3 coating was mainly plowing and abrasive wear.

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Mechanical properties and microstructure of Al2O3/TiB2 and Al2O3/TiB2/GNPs ceramic tool materials prepared by spark plasma sintering

Cited by 19 publications

References 37 publications

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

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

Tribological behavior of GNPs doped Al₂O₃ coating fabricated by SHVOF thermal spraying on cemented carbide

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Mechanical properties and microstructure of Al2O3/TiB2 and Al2O3/TiB2/GNPs ceramic tool materials prepared by spark plasma sintering

Cited by 19 publications

References 37 publications

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

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

Tribological behavior of GNPs doped Al2O3 coating fabricated by SHVOF thermal spraying on cemented carbide

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Product

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About

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

Tribological behavior of GNPs doped Al₂O₃ coating fabricated by SHVOF thermal spraying on cemented carbide