Fine grained Al2O3/SiC composite ceramic tool material prepared by two-step microwave sintering

Hong, Dongbo; Yin, Zengbin; Yan, Shiyu; Xu, Weiwei

doi:10.1016/j.ceramint.2019.03.061

Cited by 31 publications

(12 citation statements)

References 27 publications

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“…The hot-pressed composites with 20 vol% SiC resulted in higher fracture toughness of 8.7 MPa.m 0.5 [3]. Whereas 3 wt.% SiC/Al2O3 composites fabricated through two-step microwave sintering at different temperature revealed different particle grain size and different fracture toughness which is superior to Al2O3 composites [4]. Similarly, Li et al studied the surface hardness of zirconia-toughened alumina treated with boehmite sol which resulted in significant increase in surface hardness [5].…”

Section: Introductionmentioning

confidence: 93%

Mechanical and thermal properties of spark plasma sintered Alumina-MWCNTs nanocomposites prepared via improvised colloidal route

Ramachandran

Arunkumar

Boopalan³

2021

Materials Chemistry and Physics

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Section: Introductionmentioning

confidence: 93%

Mechanical and thermal properties of spark plasma sintered Alumina-MWCNTs nanocomposites prepared via improvised colloidal route

Ramachandran

Arunkumar

Boopalan³

2021

Materials Chemistry and Physics

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“…Two-step sintering is reckoned as an effective method to produce ceramic composites, because this sintering method can suppress ceramic grain growth while fully densifying ceramic composites [ 16 , 17 ]. In the first-step sintering, the green body is heated to a high temperature (T 1 ) with short dwell time or without dwell time, which is beneficial to obtain a critical relative density and makes pores unstable [ 18 ]. In the second-step sintering, the sintering sample is cooled to a lower temperature (T 2 ) with long dwell time; during this stage, grain boundary migration is frozen whereas grain boundary diffusion is active, which is beneficial to inhibiting grain growth while promoting densification [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

et al. 2021

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The interfacial structures and interfacial bonding characteristics between graphene and matrix in graphene-reinforced Al2O3–WC matrix ceramic composite prepared by two-step hot pressing sintering were systematically investigated. Three interfacial structures including graphene–Al2O3, graphene–Al2OC and graphene-WC were determined in the Al2O3–WC–TiC–graphene composite by TEM. The interfacial adhesion energy and interfacial shear strength were calculated by first principles, and it has been found that the interfacial adhesion energy and interfacial shear strength of the graphene–Al2OC interface (0.287 eV/nm2, 59.32 MPa) were far lower than those of graphene–Al2O3 (0.967 eV/nm2, 395.77 MPa) and graphene–WC (0.781 eV/nm2, 229.84 MPa) interfaces. Thus, the composite with the strong and weak hybrid interfaces was successfully obtained, which was further confirmed by the microstructural analysis. This interfacial structure could induce strengthening mechanisms such as load transfer, grain refinement, etc., and toughening mechanisms such as crack bridging, graphene pull-out, etc., which effectively improved mechanical properties.

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“…This method are able to suppress the material's grain growth during the final stage of sintering and therefore capable of producing ceramics with enhanced densification [15]. This sintering method has also been applied to produce ultra-fine powders of other ceramic materials by other researchers [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene-Oxide Addition on the Microstructure and Mechanical Properties of Two-Stage Sintered Zirconia-Toughened Alumina (ZTA) Composites

et al. 2021

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United Nations has estimated that 130 million people would suffer from osteoarthritis worldwide by 2050. This disease would require patients to undergo a surgery known as Total Hip Replacement (THR) which has a failure rate of approximately 1 % with a lifespan of 20 years. The biomaterials used to manufacture this total hip artroplasty are mainly made of Zirconia-Toughened Alumina. In this work, Zirconia Toughened Alumina (ZTA) composites with 10 vol% Y-TZP content were doped with small amount (0.01 to 1 wt%) of graphene oxide (GO). The GO-doped ZTA composites were produced via two-stage sintering with T1 ranging between 1400°C and 1550°C, heating rate of 20°C/min, followed by T2 of 1350°C and 12 hours holding time. The sintered ZTA samples were then evaluated on its microstructure and mechanical properties such as bulk density, Vickers hardness, Young’s modulus and fracture toughness to investigate the effect of GO addition on ZTA samples prepared via two-stage sintering. The results showed that ZTA composites containing up 0.1 wt% GO is beneficial in improving the microstructural and mechanical properties of ZTA composites prepared via two-stage sintering. The sample recorded a high hardness of up to 18.5 GPa, Young’s modulus of 406 GPa and fracture toughness of 5.8 MPam1/2 when sintered at T1 of 1450℃.

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Fine grained Al2O3/SiC composite ceramic tool material prepared by two-step microwave sintering

Cited by 31 publications

References 27 publications

Mechanical and thermal properties of spark plasma sintered Alumina-MWCNTs nanocomposites prepared via improvised colloidal route

Mechanical and thermal properties of spark plasma sintered Alumina-MWCNTs nanocomposites prepared via improvised colloidal route

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

Effect of Graphene-Oxide Addition on the Microstructure and Mechanical Properties of Two-Stage Sintered Zirconia-Toughened Alumina (ZTA) Composites

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