Instrumentation for quality control and flaw detection of machine parts and materials by electrostatic induction

A computer-based measurement system has been designed and built for noncontact nondestructive measurement of charge and potential distribution on dielectric and semiconductor layers and films for various purposes.Translated from Izmeritel'naya Tekhnika, No. 8, pp. 49–51, August, 1993.     

ZrO<Subscript>2</Subscript> coatings on SiC fibers

Zirconia coatings have been produced on Hi-Nicalon fibers via pyrolysis of zirconium oxalates extracted into amine-benzene solutions. X-ray diffraction and electron probe x-ray microanalysis results demonstrate that the pyrolysis of extracts is a viable approach to producing thin zirconia coatings on coreless silicon carbide fibers and that further research is needed to optimize the microstructure of zirconia coatings.     

Effects of the preparation Undevit on the indicators of vitamin provision of Norilsk's schoolchildren]

The effect of the prophylactic use of multivitamin "Undevitum" on parameters of vitamin providing of schoolchildren in Norilsk was studied. The results of the investigation showed a positive effect of the prophylactic vitamin administration on providing with vitamins of schoolchildren in Norilsk and proved the necessity of conducting mass vitamin administration to schoolchildren.     

Controllable Generation of a Submillimeter Single Bubble in Molten Metal Using a Low-Pressure Macrosized Cavity

Metallurgical and Materials Transactions B - We develop a method for generation of a single gas bubble in a pool of molten metal. The method can be useful for applications and research studies...     

Temperature dependence of the viscosity for some glasses in the Rb2O-B2O3-SiO2 system

The temperature dependences of the shear viscosity of glasses in the Rb₂O-B₂O₃-SiO₂ system are investigated using the bending method on a quartz viscosimeter in the viscosity range 10¹¹-10¹³ P.     

Synthesis and structural characterization of a liquid polyisoprene bearing amidoxime end groups

Azo-bis(isobutyroamidoxime) was synthesized and used as functionalized initiator to prepare a liquid isoprene bearing amidoxime end groups via radical polymerization. The polymer was characterized by FT-IR, Gel Permeation Chromatography and NMR. In particular, the structure of the polymer was investigated using 1D and 2D NMR techniques. The distribution of the different isoprene units (1,4-trans, 1,4-cis, 1,2 and 3,4), as well as the structure of the amidoxime end-groups was determined. It was found that the structure of the end groups was governed by the steric hindrance of the initiator. Only 1,4 and 4,1 functionalized end units were evidenced, with a majority of 4,1 end units.     

Temperature dependences of the viscosity for some glasses in the Cs2O-B2O3-SiO2 system

The viscosities of glasses in the Cs₂O-B₂O₃-SiO₂ system are measured by the bending method on a quartz viscosimeter in the temperature range 300–670°C. The temperature dependences of the viscosity of the glasses under investigation are determined, and the temperatures corresponding to the viscosities equal to 10¹¹, 10¹², and 10¹³ P are calculated.