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Young’s modulus and internal friction of the SiC/Si biomorphic composite based on the sapele wood precursor
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This study investigates the effect of vibrational strain amplitude on the Young's modulus and internal friction (ultrasound absorption) of a biomorphic SiC/Si composite derived from sapele wood, using acoustic resonance measurements in air and vacuum.
The effect of the vibrational strain amplitude on the Young’s modulus and ultrasound absorption (internal friction) of a SiC/Si biomorphic composite prepared by pyrolysis of sapele wood followed by infiltration of silicon were investigated. The studies were conducted in air and in vacuum by the acoustic resonance method with the use of a composite vibrator in longitudinal vibrations at frequencies of about 100 kHz. Measurements performed on sapele wood-based bio-SiC/Si samples revealed a substantial effect of adsorption-desorption of molecules contained in air on the effective elasticity modulus and elastic vibration decrement. Microplastic characteristics of the SiC/Si composites prepared from wood of different tree species were compared.
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Elasticity and inelasticity of the SiC/Al-13Si-9Mg biomorphic metal ceramics
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Acoustic measurements were used to investigate the elastic (Young's modulus) and microplastic properties of SiC/Al-13Si-9Mg biomorphic metal-ceramic composites made from silicon carbide derived from beech and sapele wood. The study characterizes how wood species and microstructure affect the mechanical properties of these bio-inspired lightweight structural materials.
Elastic and inelastic properties of SiC/Si biomorphic composites and biomorphic SiC based on oak and eucalyptus
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The elastic and microplastic properties of silicon carbide composites made from wood templates were investigated using acoustic techniques, finding that gas adsorption significantly affects stiffness and internal friction at small strains. The study characterizes how the biomorphic microstructure derived from oak and eucalyptus influences the mechanical behavior of these novel ceramics.
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This study examined the amplitude, temperature, and time dependences of Young's modulus and internal friction (ultrasonic attenuation) of a eucalyptus-based carbon biomatrix intended for biomorphic silicon carbide ceramics. The results showed that adsorption and desorption of ambient molecules significantly affected elastic and acoustic properties, and microplastic properties were estimated from acoustic measurement data.
Elasticity and inelasticity of biomorphic carbon, silicon carbide, and SiC/Si composite produced on the basis of medium density fiberboard
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The elastic and inelastic properties of biomorphic carbon, silicon carbide, and SiC/Si composites produced from wood-based fiberboard were characterized using acoustic measurements. The wood-derived microstructure was found to produce unique mechanical damping and stiffness properties compared to conventionally processed ceramics.
Young’s modulus and internal friction in porous biocarbon white pine wood precursors
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This study measured how the Young's modulus and internal friction of biocarbon materials derived from pine wood change with temperature and vibration amplitude, finding significant differences depending on the carbonization temperature used to make the material. The results characterize the acoustic and mechanical damping properties of biobased carbon materials.
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