Search Results

You are looking at 1 - 9 of 9 items for :

  • Silicon carbide x
  • Functional and Smart Materials x
Clear All
Open access

Ştefan Ţălu, Sebastian Stach, Shikhgasan Ramazanov, Dinara Sobola and Guseyn Ramazanov

Abstract

The purpose of this study was to investigate the topography of silicon carbide films at two steps of growth. The topography was measured by atomic force microscopy. The data were processed for extraction of information about surface condition and changes in topography during the films growth. Multifractal geometry was used to characterize three-dimensional micro- and nano-size features of the surface. X-ray measurements and Raman spectroscopy were performed for analysis of the films composition. Two steps of morphology evolution during the growth were analyzed by multifractal analysis. The results contribute to the fabrication of silicon carbide large area substrates for micro- and nanoelectronic applications.

Open access

S.M. Kahar, C.H. Voon, C.C. Lee, U. Hashim, M.K. Md Arshad, B.Y. Lim, S.C.B. Gopinath and W. Rahman

1 Introduction Silicon carbide (SiC) is one of the most popular ceramics used in the industry. It has unique characteristics such as high melting point, excellent oxidation resistance, high chemical inertness, high-thermal conductivity, good microwave absorbing ability, wide energy band gap and high mechanical strength enabling SiC to be used widely in aerospace structures, biomaterials and high temperature semiconducting devices [ 1 – 6 ]. SiC is produced mainly in industry by Acheson process. This process named after its inventor Edward Goodrich Acheson

Open access

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.

Open access

Z. Fekih, N. Ghellai, S. Sam, N. Chabanne-Sari and N. Gabouze

. Thermodynamic considerations on the role of hydrogen in sublimation growth of silicon carbide. J. Electrochem. Soc. 144 (1997) 1209. O. Shinoura, T. Koyanagi: Magnetic thin film head with controlled domain structure by electroplating technology. Electrochim. Acta 42 (1997) 3361. Despitc Aleksandar; Popov, Konstantin. "Transport Controlled Deposition and Dissolution of Metals" In Modern Aspects of Electrochemistry, Vol. 7, Brian E. Conway, John O'M. Bockris, eds. New York, NY: Plenum Press, 1972. Y

Open access

M. Czerniak-Reczulska, A. Niedzielska and A. Jędrzejczak

growth of graphene on silicon carbide, Carbon 50 (2012), 5076-5084. 24. Kolodziejczyk L., Kula P., Szymański W., Atraszkiewicz R., Dybowski K., Pietrasik R., Frictional behaviour of polycrystalline graphene grown on liquid metallic matrix, Tribology International 12 (2014), 003. 25. Zhang Y., Zhang L., Zhou C., Review of Chemical Vapor Deposition of Graphene and Related Applications, Acc. Chem. Res. 46 (2013), 2329-2339. 26. Markvart T., Castaner L., Solar Cells: Materials, Manufacture and Operation; Elsevier, Oxford 2005

Open access

W. Kucharczyk, W. Żurowski, R. Gumiński, P. Przybyłek and A. Komorek

protection systems – Part II: The role of equiaxial fillers. Composite Structures, 94 (2012) 1060-1066. http://dx.doi.org/10.1016/j.compstruct.2011.10.020 24. Alagar M, Ashok Kumar A, Mahesh KPO, Dinakaran K.: Studies on thermal and morphological characteristics of E-glass/Kevlar 49 reinforced siliconized epoxy composites. European Polymer Journal, 36 (2000) 2449-2454. 25. Minkook K, Jaeheon C, Dai Gil L.: Development of the fire-retardant sandwich structure using an aramid/glass hybrid composite and a phenolic foam-filled honeycomb. Composite Structures, 158

Open access

Fillali Cherif, Ilyes Baba Ahmed, Abdelkader Abderrahmane and Saad Hamzaoui

lektromagnatik S.B.P.G., Malays. J. Analy. Sci. , 20 (2016), 444. [12] C lark D.E., F olz D.C., W est J.K., Mater. Sci. Eng. A-Struct. , 287 (2000), 153. [13] K im T., L ee J., L ee K.H., Carbon Lett. , 15 (2014) 15. [14] B arba A.A., A more M., Relevance of dielectric properties in microwave assisted processes , in: C ostanzo S. (Ed.), Microwave Materials Characterization , InTech, London, 2012, p. 91. [15] R ezaii N., M ai J.P., Multiphysics Modelling of a Microwave Furnace for Efficient Silicon Production , COMSOL, Munich, 2016

Open access

M. Lachowicz and W. Dudziński

Abstract

In this paper, metallographic examinations, characterising microstructural changes in the 713C superalloy subjected to remelting by GTA method, are presented. In the fusion zone, precipitation of M23C6 or M6C carbides based on chromium and molybdenum was observed. Eutectic mixtures of (γ-gg′)-MxCy type with highly developed morphology were also perceived. It was found that, in the matrix areas with non-homogeneous chemical composition, the eutectic reaction γ-γ′ can occur at the temperature close to that of the precipitation of the MxCy carbides. The presence of silicon in the carbide phases can be conducive to lowering their solidification point by creating low-melting compound NbSi. Both in the fusion zone (FZ) and in the heat-affected zone (HAZ), the secondary precipitates of the Ni3(AlTi)-γ′ phase, varying in size from 50 to 100 nm, were found. The lattice mismatch factor of the γ and γ′ particles was +0.48 % to +0.71 %, which is characteristic of the coherent precipitates of the Ni3Al phase enriched with titanium. No dislocations or stacking faults were observed in the microstructure of the FZ. In the HAZ, some primary undissolved γ′ precipitates, with a part of aluminium probably replaced with niobium were observed, which raised their melting point.

Open access

Rafal Chodun, Katarzyna Nowakowska-Langier, Sebastian Okrasa and Krzysztof Zdunek

1. Introduction Nowadays, there is a noticeable increase in the interest in aluminum nitride (AlN) in electronics and optoelectronics. This material is a very special compound which combines various sets of properties. AlN is a dielectric material with a wide direct band gap of about 6 eV [ 1 – 3 ], which stands out among the oxides, carbides and nitrides with good thermal conductivity of about 285W.m -1 .K -1 [4] . A set of properties that represent this film material makes it appropriate for a wide range of applications in the technology of