References Teresa Sierra M., Gabiola I., Pujana A. et al., Analysis of energy losses for SiC and Si diodes in half-bridge modules and future applications. EPE, Birmingham, UK (2011). Changl H.-R., Hannal E., Radun A. V., Development and demonstration of silicon carbide (SiC) motor drive inverter modules. power electronics specialist conference. PESC '03 (2003). Ozpineci B., Sudhan Chinthavali M., Tolbert L. M., A 55-kW three-phase inverter with Si IGBTs and SiC schottky diodes
Michał Bonisławski and Marcin Hołub
J. Lubinski, K. Druet, A. Olszewski, A. Neyman and J. Sikora
A Multi RIG Screening Test for Thin Ceramic Coatings in Bio - Tribological Applications
A method is presented for the comparative testing of wear resistance of ceramic coatings made from materials potentially feasible in tribo - medical applications, mainly orthopaedic implants made from ceramics coated metals for low cost, long life and low wear particle emission into the body. The method was devised as the main tool for use in research and is comprised of flat on flat and ball on flat surface (sliding) tests. Seven ceramic coatings were chosen as potentially feasible for the application area known to perform well in low viscosity fluid lubrication condition. The materials used in coatings were diamond like carbon (DLC), diamond like carbon with tungsten additive (DLC-W), titanium nitride (TiN), titanium carbide (TiC), silicon carbide (SiC), chromium nitride (CrN), carbon nitride (CNx). The coatings tested were deposited in vacuum to a stainless steel substrate with the use of several methods, each suited to the coating material; The methods were the following: cathode arc evaporation (ARC), magnetron sputtering (MAG), plasma assisted chemical vapour deposition (PACVD), impulse reactive magnetron sputtering (IRMS) and a combined method ARC-MAG-RF-PACVD (radio frequency assisted - RF); A multiple role PT-3 tribometer was used for flat on flat surface tests (ring shaped surface) and a reciprocating linear motion TPZ-1 tribometer for ball on flat surface tests and a CSEM REVETEST® Scratch Tester to perform standard scratch test in air on coatings. A set of results was obtained illustrating the limiting load for each coating (the load inflicting rapid destruction of the coating) and the endurance under light loading conditions. As lubricating agents distilled water and saline water solution were used. Test results examples are presented and discussed as an illustration of the method's usability for the target application area.
J.T. Bonarski, L. Tarkowski, S. Pawlak, A. Rakowska and Ł. Major
Performed investigations and obtained results concerned the analysis of residual stresses in near-surface areas of coppercorundum (Cu-Al2O3) composite and silicon carbide (SiC) samples. X-ray diffraction and acoustic tomography techniques, as well as the suitable calculation procedures, allowed to locate sample-areas with extreme values of stresses residing in the examined materials. The registered texture-stress characteristics reflects inhomogeneity of the samples structure identified by means of acoustic tomography. Obtained results provide valuable information on anisotropy of physical properties of structural elements produced by the technologies applied to the examined samples.
I. Olejarczyk-Wożeńska, H. Adrian, B. Mrzygłód and M. Głowacki
A mathematical model of austenite - bainite transformation in austempered ductile cast iron has been presented. The model is based on a model developed by Bhadeshia [1, 2] for modelling the bainitic transformation in high-silicon steels with inhibited carbide precipitation. A computer program has been developed that calculates the incubation time, the transformation time at a preset temperature, the TTT diagram and carbon content in unreacted austenite as a function of temperature. Additionally, the program has been provided with a module calculating the free energy of austenite and ferrite as well as the maximum driving force of transformation. Model validation was based on the experimental research and literature data. Experimental studies included the determination of austenite grain size, plotting the TTT diagram and analysis of the effect of heat treatment parameters on the microstructure of ductile iron. The obtained results show a relatively good compatibility between the theoretical calculations and experimental studies. Using the developed program it was possible to examine the effect of austenite grain size on the rate of transformation.
T. Grzebyk and A. Górecka-Drzazga
References Vabond Project, "Long-term stability of vacuum-encapsulated MEMS devices using eutectic wafer bonding" http://www.ist-world.org T. Tsuchiya, Y. Kageyama, H. Funabashi, and J. Sakata, "Polysilicon vibrating gyroscope vacuum-encapsulated in an on-chip micro chamber", Sensors and Actuators A 90, 49-55 (2003). I. Kleps, A. Angelescu, N. Samfirescu, A. Gil, and A. Correia, "Study of porous silicon, silicon carbide and DLC coated field emitters for pressure sensor
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D. Kopyciński, D. Siekaniec, A. Szczęsny, E. Guzik and A. Nowak
, Erosive wear characteristics of spheroidal carbides cast, Wear. 264 (11-12), 947-957 (2008).  A. Bedolla-Jacuinde, S.L. Aguilar, B. Hernandez, Eutectic modification in a low-chromium white cast iron by a mixture of titanium, rare earths, and bismuth: I. Effect on microstructure, J. Mater. Eng. Perform. 14 (2), 149-157 (2005).  A.B. Jacuinde, W.M. Rainforth, The wear behavior of highchromium white cast irons as a function of silicon and Mischmetal content, Wear. 250 , 449-461 (2001).  Y. Matsubara, Solidification and abrasion wear of
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Agnieszka Zaraś-Szydłowska, Jan Badziak, Marcin Rosiński, Józef Makowski, Piotr Parys, Marek Piotrowski, Leszek Ryć and Jerzy Wołowski
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, Electro-thermal behaviour of a submicron silicon diode, Semicond. Sci. Tech., vol. 28, no. 2, p. 025021, 2013. 30. O. Muscato and V. D. Stefano, Electrothermal transport in silicon carbide semiconductors via a hydrodynamic model, SIAM J. APPL. MATH., vol. 75, no. 4, pp. 1941-1964, 2015. 31. G. Mascali, A hydrodynamical model for silicon semiconductors including crystal heating, Europ. J. Appl. Math., vol. 26, pp. 477-496, 2015. 32. G. Mascali, A new formula for silicon thermal conductivity based on a hierarchy of