Precursor selection and its role in the mechanical properties of porous SiC derived from wood

Kaul, Vikram; Faber, K. T.; Sepúlveda, R.; Arellano‐López, A.R. de; Fernandez, James

doi:10.1016/j.msea.2006.05.033

Cited by 74 publications

(58 citation statements)

References 28 publications

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“…The elastic moduli of BE-SiC and SASiC, measured in compression with the applied load in the axial direction, were 116 and 23 GPa, respectively, while the moduli with the load perpendicular to the pore channels were 16 and 7 GPa. 12 These data indicated that the microstructure (i.e., spatial distribution of pores for a given volume fraction of porosity) strongly influenced the SiC mechanical properties, but this was not the case for the MCCs.…”

Section: A Elastic Behaviormentioning

confidence: 90%

“…Throughout the processing of wood-derived SiC, the wood microstructure is retained, resulting in a honeycomb-like SiC material. The porosity, spatial distribution, and orientation of the pores affect the properties of the porous SiC, 12,13 but the influence of these factors, which are determined by the wood precursor, on the mechanical properties of the MCCs are not known.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties of wood-derived silicon carbide aluminum-alloy composites as a function of temperature

et al. 2008

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The mechanical behavior [i.e., stiffness, strength, and toughness (K IC )] of SiC Al-Si-Mg metal-ceramic composites (50:50 by volume) was studied at temperatures ranging from 25 to 500°C. The SiC phase was derived from wood precursors, which resulted in an interconnected anisotropic ceramic that constrained the pressure melt-infiltrated aluminum alloy. The composites were made using SiC derived from two woods (sapele and beech) and were studied in three orthogonal orientations. The mechanical properties and corresponding deformation micromechanisms were different in the longitudinal (LO) and transverse directions, but the influence of the precursor wood was small. The LO behavior was controlled by the rigid SiC preform and the load transfer from the metal to the ceramic. Moduli in this orientation were lower than the Halpin-Tsai predictions due to the nonlinear and nonparallel nature of the Al-filled pores. The LO K IC agreed with the Ashby model for the K IC contribution of ductile inclusions in a brittle ceramic.

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Section: A Elastic Behaviormentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Mechanical properties of wood-derived silicon carbide aluminum-alloy composites as a function of temperature

et al. 2008

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“…It presents relatively light material with open porous structure, which possesses excellent mechanical properties in compression and flexure. 16 The technology of its fabrication allows for relatively easy production of complex shapes by using preliminary machining of biomorphic carbon precursor. 12 The processing of bio-SiC is much cheaper because it occurs at temperatures that are much lower than those required for SiC sintering or hot-pressing techniques.…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of biomorphic SiC ceramics and SiC/Si composites fabricated from medium density fiberboard

Orlova

Popov

Cancapa

et al. 2011

Journal of the European Ceramic Society

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A study has been made of the dependences of the electrical resistivity and the Hall coefficient on the temperature in the range 1.8-1300 K and on magnetic fields of up to 28 kOe for the biomorphic SiC/Si (MDF-SiC/Si) composite and biomorphic porous SiC (MDF-SiC) based upon artificial cellulosic precursor (MDF -medium density fiberboards). It has been shown that electric transport in MDF-SiC is effected by carriers of n-type with a high concentration of ∼1020 cm−3 and a low mobility of ∼0.4 cm2 V−1 s−1. The specific features in the conductivity of MDF-SiC are explained by quantum effects arising in disordered systems and requiring quantum corrections to conductivity. The TEM studies confirmed the presence of disordering structural features (nanocrystalline regions) in MDF-SiC. The conductivity of MDF-SiC/Si composite originates primarily from Si component in the temperature range 1.8-500 K and since ∼500 to 600 K the contribution of MDF-SiC matrix becomes dominant.

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“…However, while mechanical properties such as strength, hardness and thoughness have been extensively evaluated [17][18][19][20][21][22][23], in the case of wear only erosion has been studied [24,25], and no sliding wear studies exist in the literature to the best of our knowledge. With this in mind, we have studied sliding wear of bioSiC derived from wood precursors of different species at different applied loads, with the double intention of obtaining relevant data of friction coefficients and wear rates as well as to elucidate the effect of microstructure and, ultimately, wood precursor, on these properties.…”

Section: Introductionmentioning

confidence: 99%

Sliding wear resistance of biomorphic SiC ceramics

Vera

Ramírez‐Rico

Fernandez

et al. 2015

International Journal of Refractory Metals and Hard Materials

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Biomorphic SiC ceramics were fabricated from four different wood precursors and their Knoop hardness and sliding wear resistance when sliding against a Si3N4 ball in air were studied.Tribological experiments were performed using a pin on disk apparatus, under normal loads of 2 and 5 N, at a sliding speed of 100 mm/s. The effects of specimen porosity and microstructure on measured wear were evaluated. A commercial sintered silicon carbide ceramic was also tested for comparison. Small differences in friction coefficient comparable to monolithic SiC ceramics were obtained. Several concurrent wear mechanisms are taking place: microfracture, plastic deformation in the Si phase and oxidation of the Si and/or SiC phase. The presence of an oxide tribolayer was assessed using fluorescence microscopy. Wear rates were found to scale with SiC content and depend on residual porosity in the composite.

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Precursor selection and its role in the mechanical properties of porous SiC derived from wood

Cited by 74 publications

References 28 publications

Mechanical properties of wood-derived silicon carbide aluminum-alloy composites as a function of temperature

Mechanical properties of wood-derived silicon carbide aluminum-alloy composites as a function of temperature

Electrical properties of biomorphic SiC ceramics and SiC/Si composites fabricated from medium density fiberboard

Sliding wear resistance of biomorphic SiC ceramics

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