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The process optimization of electron beam active brazing of cubic boron nitride to tungsten carbide cutting tools

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Felba J. , Friedel K. , Habeck M. , Krull P. , Nitschke-Pagel T. , Pobol I. , Wohlfahrt H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

1999

tom z. 123

207-210

Obtaining of the reliable cubic boron nitride (CBN) - tungsten carbide joints is the essential problem in the production of the cutting tool with this superhard material. It can be done by active brazing process in vacuum with an electron beam as a heat source. Using the experimental design method based on Taguchi techniques for quality engineering, it was stated that the heating time, the electron beam current and the roughness of the CBN surface influence mostly the join shear strength.

Electromagnetic interference shielding properties of the Cu, Ti and Cr coatings deposited by Arc-PVD on textile materials

100%

Proudnik A. , Zamastotsky Y. , Siarheyev V. , Siuborov V. , Stankevich E. , Pobol I.

Przegląd Elektrotechniczny

2012

tom R. 88, nr 6

81-83

The aim of work was to develop flexible shielding materials with radio protective properties. The article describes the investigation of the effect of metal coatings and their deposition parameters on the shielding properties of textile materials for creation of materials for protection of human organisms from electromagnetic radiation. The samples were prepared using samples of fabrics and knitted fabrics made from natural, synthetic and artificial fibers and yarns of different weaves. Metal coatings were deposited on the textile materials using arc physical vacuum deposition process (cathodic arc deposition or Arc-PVD). To create shielding metal coatings Cu, Ti and Cr coatings were used in the coating system. Cu and Ti coatings were created in the vacuum and in the presence of carbon dioxide. Frequency behaviour of electromagnetic radiation attenuation and reflection of the samples in the band of 8–12 GHz was studied using network analyzer and waveguide measurement path.

Opisano badania właściwości ekranujących metalizowanych materiałów tekstylnych mających służyć do ochrony ludzi przed promieniowaniem elektromagnetycznym.