Influence of ultrasound vibrations on the process of synthesis and the fine structure of combustion products in the titanium-silicon system

The burning rates and maximum combustion temperatures as functions of the ultrasound vibration amplitude are given for mixtures of titanium-silicon powders with different ratios of the initial components. The results of measurements of the crystal lattice parameters of the synthesized phases (Ti₅Si₃ and TiSi₂) are given. It is inferred that the use of ultrasound vibrations in the process of self-propagating high-temperature synthesis provides a method for controlling the crystalline structure of the synthesized materials.Institute of the Physics of Solids and Semicondutors, Academy of Sciences of Belarus, Vitebsk Branch, Vitebsk. Institute of Structural Macrokinetics, Russian Academy of Sciences, Chernogolovka. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 65, No. 4, pp. 471–475, October, 1993.     

The toxicological problems of disaster medicine in the Navy Fleet]

From position of the uniform concept of the accident medicine the problems of toxicological supply of the ships of MNF are considered. Peculiarities of chemical accidents in the ship conditions are marked. The question about principles of harmful chemical substances regulating, forming air environment of ship living quarters is discussed. The prospects of practical use of antidotal means, intended for protection of personnel from toxic action of carbon dioxide and chemical combinations, causing development of toxic edema of lungs are given.