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[100] Loading of Fcc Based Nanofibre Reinforced Composites

100%

Černý M., Pokluda J.

Acta Physica Polonica A

2012

vol. 122

issue 3

505-508

Ab initio calculations of theoretical tensile and compressive strengths in the 〈100〉 direction of a composite having continuous nanofibre reinforcements are performed using pseudopotential approach within density functional theory. Results for iridium or platinum nanofibres in copper or gold matrices, presented as case studies, reveal that the theoretical tensile and compressive strengths almost linearly increase with increasing atomic concentration of the reinforcement exhibiting only slight positive strength deviations from the linearity for Pt-Au and slight negative deviations of the tensile strength for Ir-Cu.

Preparation of Silicon Oxycarbide Composites Toughened by Inorganic Fibers via Pyrolysis of Precursor Siloxane Composites

52%

Strachota A., Černý M., Glogar P., Sucharda Z., Havelcová M., Chlup Z., Dlouhý I., Kozák V.

Acta Physica Polonica A

2011

vol. 120

issue 2

326-330

The optimization of silicon oxycarbide (SiOC) synthesis (sol-gel/pyrolysis) is described, starting from methyltriethoxysilane, dimethyldiethoxysilane, tetraethoxysilane, ethyltriethoxysilane and propyltriethoxysilane. Variation of final elemental composition was tested via change of monomer ratios and combinations. The main aim was to achieve low weight losses during cure and pyrolysis and high micromechanical properties. Gas chromatography and mass spectroscopy was used to analyse the by-products of cure and pyrolysis, indicating a prominent role of cyclosiloxane and polyhedral oligomeric silsesquioxane (POSS) oligomers. Best results were obtained with high contents of methyltriethoxysilane in the monomers mixture.

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2 Acta Physica Polonica A

1 2012

1 2011

2 Černý M.

1 Chlup Z.

1 Dlouhý I.

1 Glogar P.

1 Havelcová M.

1 Kozák V.

1 Pokluda J.

1 Strachota A.

1 Sucharda Z.

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[100] Loading of Fcc Based Nanofibre Reinforced Composites

Preparation of Silicon Oxycarbide Composites Toughened by Inorganic Fibers via Pyrolysis of Precursor Siloxane Composites