Catalyst-free synthesis of β-SiC polyhedra and α-SiC nano-platelets by RF thermal plasma

Yao, Ming‐Shui; Jin, Huacheng; Li, Jinlin; Ding, Fei; Chen, Lu; Yuan, Fangli

doi:10.1016/j.matlet.2013.10.102

Cited by 7 publications

(5 citation statements)

References 15 publications

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“…Silicon carbide or nitride is popular as an advanced structural material with high-temperature applications. These are superior for their thermal, chemical, and mechanical properties. , Si 3 N 4 has high fracture toughness and low oxidation resistance at elevated temperature, while SiC exhibits proper resistance against oxidation at high temperature but low fracture toughness . It is beneficial to combine these two materials to make a durable structure which can withstand a hostile service environment.…”

Section: Resultsmentioning

confidence: 99%

Innovative Surface Engineering of High-Carbon Steel through Formation of Ceramic Surface and Diffused Subsurface Hybrid Layering

Hossain

Pahlevani

Cholake

et al. 2019

ACS Sustainable Chem. Eng.

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In this study, we have demonstrated an innovative single-step, low-cost approach for producing a hybrid layered steel surface with superior properties using waste as the resource. This promising method of transforming an industrial grade steel surface into a multilayered multiphase ceramic/diffused subsurface structure using only the waste source could replace technically challenging and expensive high-performance materials. Strong chemical bonds can be achieved between metal and ceramic structures if a suitable structure can be generated by the judicious choice of materials and processes. We recovered various ceramic materials (Ti, Al, Si/nitrides, oxides, etc.) from a complex mixture of wastes, such as automated shredder residue and metalized plastics from food packaging, through a controlled selective reaction to generate a chemically bonded multiphase ceramic and diffused subsurface on high-carbon steel surface as an ultrahard ceramic surface. The diffused subsurface contains submicrometer-sized carbides (Cr/Mn/SiC) which formed by diffusion of carbon into the base metal. Our result reveals that by turning the normal high-carbon steel surface into a multiphase ceramic/diffused subsurface structure, a seamless gradient of hardness from 14.5 GPa in the nanoceramic layer to 6.5 GPa in the base material can be achieved.

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Section: Resultsmentioning

confidence: 99%

Innovative Surface Engineering of High-Carbon Steel through Formation of Ceramic Surface and Diffused Subsurface Hybrid Layering

Hossain

Pahlevani

Cholake

et al. 2019

ACS Sustainable Chem. Eng.

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“…It is well-known that the lowest energy surface for a liquid droplet is a sphere. The quenching rate was ultrahigh for the powders formed in the upper part of the chamber (surrounded by cooling water); therefore, the surface atoms of the condensed spherical droplets lose their energy very fast and do not move around, , which resulted in the formation of spherical particles. In contrast, the surface atoms of the particles condensed at a low quenching rate lost their energy slowly, and equilibrium forms were formed.…”

Section: Resultsmentioning

confidence: 99%

Dopant-Controlled Morphology Evolution of WO₃Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties

Yao

Hou

et al. 2015

ACS Appl. Mater. Interfaces

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In this paper, a simple way is developed for the synthesis of Cr-doped WO3 polyhedra controlled by tailoring intrinsic thermodynamic properties in RF thermal plasma. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy are used to characterize the detail structures and surface/near-surface chemical compositions of the as-prepared products. Kinetic factors showed little effects on the equilibrium morphology of Cr-doped WO3 polyhedra, while equilibrium morphologies of WO3 polyhedra can be controlled by the thermodynamic factor (Cr doping). Set crystal growth habits of pure WO3 as an initial condition, coeffects of distortions introduced by Cr into the WO3 matrix, and a chromate layer on the crystal surface could reduce the growth rates along [001], [010], and [100] directions. The morphology evolution was turning out as the following order with increasing Cr dopants: octahedron-truncated octahedron-cuboid. 2.5 at. % Cr-doped WO3 polyhedra exhibit the highest sensing response due to coeffects of exposed crystal facets, activation energy, catalytic effects of Cr, and particle size on the surface reaction and electron transport units. By simply decorating Au on Cr-doped WO3 polyhedra, the sensing responses, detection limit, and response-recovery properties were significantly improved.

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“…Silicon carbide (SiC) and silicon nitride (Si 3 N 4 ) are advanced high temperature structure materials with outstanding thermal, chemical and mechanical properties [9,10]. However they have different characteristics in mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of SiC/Si3N4 nanocomposite by using automotive waste tyres as resource

Rajarao

Farzana

Khanna

et al. 2015

Journal of Industrial and Engineering Chemistry

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Catalyst-free synthesis of β-SiC polyhedra and α-SiC nano-platelets by RF thermal plasma

Cited by 7 publications

References 15 publications

Innovative Surface Engineering of High-Carbon Steel through Formation of Ceramic Surface and Diffused Subsurface Hybrid Layering

Innovative Surface Engineering of High-Carbon Steel through Formation of Ceramic Surface and Diffused Subsurface Hybrid Layering

Dopant-Controlled Morphology Evolution of WO₃Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties

Synthesis of SiC/Si3N4 nanocomposite by using automotive waste tyres as resource

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Catalyst-free synthesis of β-SiC polyhedra and α-SiC nano-platelets by RF thermal plasma

Cited by 7 publications

References 15 publications

Innovative Surface Engineering of High-Carbon Steel through Formation of Ceramic Surface and Diffused Subsurface Hybrid Layering

Innovative Surface Engineering of High-Carbon Steel through Formation of Ceramic Surface and Diffused Subsurface Hybrid Layering

Dopant-Controlled Morphology Evolution of WO3Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties

Synthesis of SiC/Si3N4 nanocomposite by using automotive waste tyres as resource

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Dopant-Controlled Morphology Evolution of WO₃Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties