SiC‐Keramiken auf der Basis von Holzwerkstoffen

Gahr, Michaela; Schmidt, Jens; Krenkel, Walter; Hofenauer, Andreas

doi:10.1002/9783527609017.ch61

Cited by 3 publications

(3 citation statements)

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“…In this case, hard carbide or some other ceramic phases are bonded by in situ formed SiC or by the metallic phase. Biomorphic RBSC can be produced when the pyrolyzed wooded preforms are infiltrated with molten silicon yielding SiC formation 107–110 . Different shapes can be manufactured using this approach, although the difficulty to infiltrate components with thick walls (>15–20 mm) or uneven thicknesses limit this process applicability.…”

Section: Major Advanced Ceramic Composite or Coating Materials For Pr...mentioning

confidence: 99%

“…Biomorphic RBSC can be produced when the pyrolyzed wooded preforms are infiltrated with molten silicon yielding SiC formation. [107][108][109][110] Different shapes can be manufactured using this approach, although the difficulty to infiltrate components with thick walls (>15-20 mm) or uneven thicknesses limit this process applicability. The required high-temperature firing in controlled atmosphere and furnaces suitable for the production of large components, as well as rather high production cost (more expensive than nitride or oxide bonded SiC), also limit the wide industrial application of these technologies for components designated for mining and mineral processing.…”

Section: F I G U R Ementioning

confidence: 99%

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Advanced ceramics and coatings for erosion‐related applications in mineral and oil and gas production: A technical review

Medvedovski¹

2022

Int J Applied Ceramic Tech

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The applications of advanced ceramics, composites and coatings in mineral, mining, fuel production, and processing are reviewed. The materials include oxide and non‐oxide ceramics (specifically SiC‐based), ceramic–ceramic, and ceramic–metal composites, coatings on metallic components where functional application properties can be achieved. Some principles of materials selection, specifically for erosion wear and corrosion applications, and manufacturing are considered. The examples of the successful development and processing of ceramics, coatings, and composites with manageable structures and phase compositions, in the erosion‐related applications, particularly conducted by the author, are discussed and reviewed. Specifically, industrially employed types of ceramics and processing routes were focused on the considered applications. Particular demands for advanced materials with high reliability and complex shapes or for protective coatings on complex shape steel components and long tubing with inner surface protection require novel and optimized processing. The factors affecting erosion and erosion–corrosion resistance and the paths for the erosion resistance enhancement of ceramic and coating materials are considered. Ceramic components design, technology, and installation features are reviewed.

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Section: Major Advanced Ceramic Composite or Coating Materials For Pr...mentioning

confidence: 99%

Section: F I G U R Ementioning

confidence: 99%

Advanced ceramics and coatings for erosion‐related applications in mineral and oil and gas production: A technical review

Medvedovski¹

2022

Int J Applied Ceramic Tech

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“…Two main routes for the production of the green bodies have been reported: Either from thermoset bonded natural fibre boards (chipboards, MDF) [1][2][3][4], or from thermoplastic-based wood polymer composites (WPC) by extrusion or injection moulding [5]. The first method is mainly limited to planar geometries and requires costly and time-consuming further processing to obtain three-dimensional (3D) structures.…”

Section: Introductionmentioning

confidence: 99%

Morphology and Characterisation of Novolac–LDPE-Based Mixtures as Matrix for Injection Moulded Green Bodies for Bio-Based SiC Ceramics

et al. 2019

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This work focuses on the influence of the composition of novolac–LDPE-based mixtures, which serve as a matrix for the green bodies for bio-based silicon carbide (C/Si/SiC) ceramics, on the morphology and the mechanical properties of the green bodies and the ceramics produced thereof. The green bodies were obtained through compounding and injection moulding, and were characterised by scanning electron microscopy (SEM) and mechanical testing. Selected formulations were reinforced with natural fibres, pyrolysed to yield porous carbon templates, and converted into C/Si/SiC ceramics via liquid silicon infiltration. The carbon and ceramic specimens were characterised by light optical microscopy (LOM) and mechanical testing. Without further additives, very coarse morphologies of the novolac–LDPE-based mixtures were obtained, but the miscibility could be improved by the addition of a coupling agent and a lubricant. The pore structure of the carbon specimens was dependent on the phase distribution in the green bodies, and in turn determined the morphology of the C/Si/SiC ceramics. In all steps of the process chain, the morphology had a very strong influence on the mechanical properties. From green bodies with a homogeneous phase distribution, ceramic specimens with a SiC content of up to 75 vol% could be obtained.

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