Nanošenje tankih filmova CVD postupcima

Chemical vapor deposition - (CVD) has rapidly grown in the last twenty years and applications of this fabrication process are now key elements in many industrial products, such as semiconductors, optoelectonics, optics, cutting tools, refractory fibers and many others. The reasons for the success of CVD are simple: (i) CVD is relatively uncomplicated and flexible technology which are accommodate many variations; (ii) with CVD is possible to coat almost any shape of almost any size; (iii) unlike other thin film techniques, CVD can also be used to produce fibers, monoliths and powders and (iv) CVD is economically competitive. Two major contributors to this rapid growth are plasma CVD (PACVD) and metalo-organic CVD (MOCVD), which will be explained in this work. Also, appropriate examples of MOCVD and PACVD experiments will be presented.Chemical vapor deposition - CVD je proces koji se izuzetno razvio u poslednjih dvadeset godina, a produkti njegove proizvodnje su danas bitni elementi u industriji poluprovodnika, reznog alata, optičkih vlakana, optoelektronici, i mnogim drugim. Razlozi ovakvog uspeha CVD tehnologija su: (i) CVD je relativno jednostavna i fleksibilna tehnologija koja može da se prilagodi velikim varijacijama uslova; (ii) sa CVD tehnologijom moguće je napraviti tanku prevlaku praktično bilo kojeg oblika i veličine; (iii) za razliku od drugih tehnika tankog filma, CVD može da se koristi za proizvodnju vlakana, monolita i prahova i (iv) cena ovog postupka je vrlo konkurentna. Najvažniji oblici CVD su plazma CVD (PACVD) i metalo-organski CVD (MOCVD) postupci čije osnove će biti opisane u ovom radu. Takođe, ovi postupci će biti ilustrovani odgovarajućim primerima

Examination of wear resistance of polymer-basalt composites

Olivine basalt, as a natural material, has excellent physical and mechanical properties such as hardness, compressive strength, wear resistance, color and gloss. On the other hand it is difficult for processing, because of its high values of mechanical properties. Retention of physical and mechanical properties of basalt and its formation is only possible by mixing basalt powder with polymers, which would enable the composite material that can be formed by the casting process into complex shapes. The mechanical properties of the obtained composites and production technologies are, to a great extent, unknown in both, local and foreign literature. Researches conducted and presented in this paper show an overview of tribological behavior of the basaltic composite material, and some technological parameters of the production process. Based on the obtained results, it can be determine the best ratio of components in the composite. These data are important for the development of new composite materials based on basalt, which will have significant application in the future