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Diamond in Surface Acoustic Wave Sensors

100%
Hribšek M., Ristić S., Radojković B.
Acta Physica Polonica A
|
2010
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vol. 117
|
issue 5
794-798
EN
The application of diamond in surface acoustic wave sensors is considered. The new method of the complete analyses of diamond-based gas chemical sensors is presented. It is based on the electromechanical equivalent circuit of the surface acoustic wave sensor. The method is very efficient and can be used for the optimal design of gas sensors. Since the diamond can be easily merged into solid state and biological systems, the development of smart biological sensors is possible. The advantages over silicon based sensors are also shown.
2
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Laser-PMMA Interaction and Mechanical Stresses

88%
Kovačević A., Srećković M., Gospavić R., Ristić S., Jovanić P.
Acta Physica Polonica A
|
2007
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vol. 112
|
issue 5
981-986
EN
The polymethylmetacrylate samples were exposed to laser beams of various types of lasers. The modifications of the surfaces of the samples were analyzed by light microscopy and scanning electron microscopy. Numerical approach to thermal distribution for specified power ranges of selected lasers was obtained. The results of polymethylmetacrylate drilling and cutting performed by laser and non-laser means were compared by photoelastic methods.
3
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Ruby Laser Interaction with Austenite Structural Materials

76%
Milosavljević A., Petronić S., Srećković M., Ristić S., Nešić I., Pljakić R., Negovanović V.
Acta Physica Polonica A
|
2009
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vol. 115
|
issue 4
823-825
EN
The investigations were carried out on chrome nickel steel and nickel based superalloy samples thermo-mechanically treated to obtain optimal mechanical properties and surface stability. Chrome nickel steel and a few nickel based superalloys samples were exposed to the laser beam before creep deformation process. The second group of nickel based superalloy samples were exposed after the creep deformation. The damages occurred by exposing of chrome nickel steel and nickel base superalloy samples to the ruby laser were analyzed by scanning electron microscope and energy-dispersive X-ray spectrometry. In this paper, the influence of laser dynamical regime (MW/mm^{2}) to the microstructural changes of heat treated chrome nickel steel and nickel based superalloy are analyzed and discussed.
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