Effect of solid loading on properties of Cr<sub>2</sub>O<sub>3</sub>refractories by aqueous gelcasting

Ding, Chunhui; Zhang, Cheng; Di, Lizhi; Zhai, T.; Lu, Lixia; Yang, Duo

doi:10.1179/1432891715z.0000000001513

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…At the same time, the relative reduction of the adsorbed dispersant of the powder surface also gave rise to an increase in the slurry viscosity with solid loading. Having an excessive viscosity will make it difficult for slurries to fill molds [ 30 , 31 ]. Generally, gel-casting systems require well-dispersed slurries with viscosities of less than 1 Pa·s.…”

Section: Resultsmentioning

confidence: 99%

“…It is thought that slurry with a low viscosity and high solid loading is the basis for preparing high-quality products by gel-casting. Previous research has reported the effects of solid loading on the properties of slurries and sintered specimens in the ceramic field [ 30 , 31 , 32 ]. For example, Duan [ 32 ] found that the mechanical performance of SiC-10AlN ceramic first increased with an increase in the solid content and then became obviously worse while the solid content became 42 vol.%.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Solid Loading on the Gel-Casting of Porous NiTi Alloys

et al. 2022

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Porous NiTi alloys are widely applied in the field of medical implant materials due to their excellent properties. In this paper, porous NiTi alloys were prepared by non-aqueous gel-casting. The influence of solid loading on the process characteristics of slurries and the microstructure and mechanical properties of sintered samples were investigated. The viscosity and the stability of slurry significantly increased with the growth of solid loading, and the slurry had better process characteristics in the solid loading range of 40–52 vol.%. Meanwhile, the porosity and average pore diameter of the sintered NiTi alloys decreased with a rise in the solid loading, while the compressive strength increased. Porous NiTi alloys with porosities of 43.3–48.6%, average pore sizes of 53–145 µm, and compressive strengths of 87–167 MPa were fabricated by gel-casting. These properties meet the requirements of cortical bone. The results suggest that the pore structure and mechanical properties of porous NiTi products produced by gel-casting can be adjusted by controlling the solid loading.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Solid Loading on the Gel-Casting of Porous NiTi Alloys

et al. 2022

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“…When the mass fraction of the dispersant increases to 2 wt%, the viscosity of the slurry begins to gradually increase. Because the dispersant adsorbed on the surface of the abrasive reaches saturation, resulting in the thickness of the surface double electric layer being compressed, the number of charges adsorbed on the surface of the abrasive decreases, the electrostatic repulsion between particles decreases, and the viscosity of the slurry increases [36]. To sum up, in order to ensure better abrasive dispersion, the mass fraction of dispersant is selected to be 1.5 wt% in this paper.…”

Section: Influence Of the Dispersant Concentration And Ph Value On Th...mentioning

confidence: 99%

The Preparation and Performance Analysis of a Cr2O3 Gel Abrasive Tool for Sapphire Substrate Polishing

et al. 2022

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In order to solve the problem of the agglomeration of abrasives in traditional hot-pressing abrasive tools, this paper proposes a chromium oxide (Cr2O3) gel abrasive tool with a polyacrylamide gel and a polyimide resin as the bonding agent. The effects of the dispersant and slurry pH on slurry viscosity and the effects of different sintering temperatures on the properties of the abrasives tool were explored. The influence of abrasive tools on the friction coefficient at different sintering temperatures was compared through friction and wear experiments. A comparison experiment of sapphire substrate polishing was carried out to compare the processing effect of the hot-pressing abrasive tool and the gel abrasive tool on the workpiece. The experimental results show that, when the pH value of the slurry is between 8–9 and the mass fraction of the dispersant is 1.5 wt%, the viscosity of the slurry is the lowest. When the sintering temperature is 350 °C, the tensile and flexural strengths of the abrasive tool reach 96 MPa and 42 MPa, and the hardness reaches 72 HRF. In the friction wear test, the friction coefficient is the most stable, and the wear rate of the abrasive tool is the lowest. In the polishing experiment, the gel abrasive tool performs better than the hot-pressing abrasive tool. After processing using the gel abrasive tool, the average surface roughness Ra reaches 2.69 nm, and the flatness PV reaches 0.65 μm; after CMP, the surface roughness Ra reaches 0.67 nm and no scratches appear on the surface of the sapphire.

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Improving the properties of binder jetted ceramics via nanoparticle dispersion infiltration

Zhao

Wang

Gang-hui

et al. 2022

Ceramics International

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Effect of solid loading on properties of Cr₂O₃refractories by aqueous gelcasting

Cited by 3 publications

References 13 publications

Influence of Solid Loading on the Gel-Casting of Porous NiTi Alloys

Influence of Solid Loading on the Gel-Casting of Porous NiTi Alloys

The Preparation and Performance Analysis of a Cr2O3 Gel Abrasive Tool for Sapphire Substrate Polishing

Improving the properties of binder jetted ceramics via nanoparticle dispersion infiltration

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Effect of solid loading on properties of Cr2O3refractories by aqueous gelcasting

Cited by 3 publications

References 13 publications

Influence of Solid Loading on the Gel-Casting of Porous NiTi Alloys

Influence of Solid Loading on the Gel-Casting of Porous NiTi Alloys

The Preparation and Performance Analysis of a Cr2O3 Gel Abrasive Tool for Sapphire Substrate Polishing

Improving the properties of binder jetted ceramics via nanoparticle dispersion infiltration

Contact Info

Product

Resources

About

Effect of solid loading on properties of Cr₂O₃refractories by aqueous gelcasting