Structure of a shock wave propagating in a two-phase medium

Moscow. Translated from Goreniya i Vzryva, Vol. 25, No. 3, pp. 115–117, May–June, 1989.     

Study of self-stratifying compositions

Paint applied as a single layer, and its spontaneous separation to form a primer and a top coat, is one of the newest concepts of the effective and economical application of two layers in one step. The influence of the molecular weight of epoxy oligomer and acrylic polymer and their ratio on self-stratification was investigated. The degree of stratification depending on molecular weight and their mutual ratio was determined using ATR-FTIR spectroscopy, differential scanning calorimetry, microscopy techniques, adhesion tests, and surface tension measurements. Phase separation and self-stratification of two-component homogenous mixtures were followed using FTIR technique and surface tension measurements. As a result of these investigations, optimal oligomeric/polymeric composition was selected. The obtained coating system showed good mechanical properties, gloss, and interlayer adhesion.     

Thermal oxidation and nitration of systems of tri-n-butyl phosphate+diluent

A. A. Bochvar All-Union Scientific Institute for Inorganic Materials (VNIINM im. A. A. Bochvara). Translated from Atomnaya Énergiya, Vol. 71, No. 4, pp. 333–337, October, 1991.     

An investigation of the thermal processes of casting and cooling of fused and cast corundum blocks

Conclusions The problem of cooling fused and cast parts in a unidimensional approximation under conditions of a blurred phase transition of the molten material into the crystalline state was solved.Means of increasing the quality of corundum blocks, including preservation of the hot top in cooling, an increase in the depth of cooling of the parts before placing them in the cooling box, and preheating of the cooling box insulation, were determined.The desirability was shown of changing the existing method by replacement of the cooling boxes with specialized cooling equipment.Translated from Ogneupory, No. 5, pp. 38–43 May, 1985.     

A circular tunnel kiln for firing of refractories

Conclusions The first high-temperature circular tunnel kiln in the country, in which firing of mullite-corundum refractories with a phosphate binder at 1400–1500°C has been introduced, has been placed in service.The operation of the kiln is characterized by the high service reliability of its design elements, including the hearth system, and insignificant costs for routine repairs of the kiln equipment.Translated from Ogneupory, No. 2, pp. 40–44, February, 1985.