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Cutting capacity and wear resistance of Cr2O3-AlN nanocomposite ceramic obtained by field activated sintering technique (FAST)

Lavrynenko S., Gevorkyan E., Kucharczyk W., Chalko L., Rucki M.

Advances in Materials Science

2018

Vol. 18, nr 3(57)

15--21

Chromium oxide ceramics may be considered as a new generation of ceramic materials for cutting tools with considerably improved high speed cutting performance. The present work is focused on the development of Cr2O3 nanocomposite materials fabricated with the Field Activated Sintering Technique (FAST). The main objective of the proposed work is to study the influence of electric field on the densification process during FAST sintering of the materials in the Cr2O3-AlN system with nanosize microstructure. Additional objectives are to characterize mechanical properties of the obtained Cr2O3 ceramics. The work aimed to develop composite materials based on Cr2O3-based nanoparticles for cutting, then to check their cutting properties and to work out the recommendations for their use for processing of various materials, accordingly.

Application of artificial neural nerworks in oxidation kinetic analysis of nanocomposites

Straszko J., Biedunkiewicz A., Strzelczak A.

Polish Journal of Chemical Technology

2008

Vol. 10, nr 3

21-28

This study concerns the application of artificial neural networks in oxidation kinetic analysis of ceramic nanocomposites. The oxidation of the Ti-Si-C ceramic nanocomposite in dry air was studied. The size of the nanoparticles was determined by scanning electron microscopy (SEM). The gaseous oxidation products were analysed by mass spectroscopy (MS) while the solid oxidation products by X-ray diffraction (XRD). The kinetic analysis of the oxidation was based on the Coats-Redfern equation. The kinetic models were identified for the consecutive stages and then the A and E parameters of the Arrhenius equations were evaluated. Artificial neural networks were used at each step of the kinetic calculations.