Advanced Hetero-Modulus and Hetero-Viscous Complex Materials

Abstract:

To obtain advance hetero-modulus and hetero-viscous complex materials with extreme high dynamic strength, wear and thermal shock resistances a novel approach was applied by the authors. The developed new hetero-modulus and hetero-viscous composites were reinforced with nanoparticles and submicron fibers and whiskers of Si₂ON₂, SiAlON, AlN, Si₃N₄ as well as with special additives, which had turned into amorphous phases during sintering. These types of materials have several Youngs modulus and viscosities simultaneously and have high damage tolerance and ability to absorb and dissipate the elastic energy during crack propagation. Understanding the energy engorgement of high speed collision processes, the material structures and rheological properties of such a complex hetero-modulus and hetero-viscous material the authors could mathematically describe the mechanical shear stresses in these complex materials. Analytical methods applied in this research were scanning electron microscopy (SEM), X-ray diffraction, and energy dispersive spectrometry, digital image analysis was applied to microscopy results, to enhance the results of transformations.

• Periodical: Materials Science Forum (Volume 729)
• Pages: 43-48
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.729.43
• Online since: November 2012
• Authors: László A. Gömze, Ludmila N. Gömze
• Keywords: Alumina, Ceramic, Composite, Elasticity, Nanoparticle, Plasticity, Viscosity

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