Implementation of fast-neutron radiography on a stationary neutron generator using a CCD detector

Radiographic images in ≈3.5-MeVdd-neutrons are obtained using a CCD detector for visualization. It is shown that radiographic images with a space resolution of ≤1 mm and 150-mm field of view at an exposure time of ≈5 min can be produced. Features of the radiography with a point neutron source of the generator type are considered.     

Heat-mass transport in “chemical” liquid boiling

Using the reaction of zinc with hydrochloric acid as an example, an experimental and theoretical study is performed of transport phenomena. The coefficients obtained are compared to data on liquid boiling.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 52, No. 6, pp. 910–916, June, 1987.     

Parameter measurement and modeling the process of oscillation chaotization in a self-modulated generator

The results are presented of measurements and numerical modeling of oscillation chaotization in a fiber-optic self-modulated generator.Translated from Izmeritel'naya Tekhnika, No. 11, pp. 22–24, November, 1995.     

Some Causes and Methods of Elimination of Aging of Asphalt Concrete

The problems that arise when the structure of asphalts contains unstable fragments and the purposeful effect of modifiers and different kinds of stone material on them are examined. The possibility of predicting some properties of asphalts and asphalt concretes and correcting these properties based on theoretical advances in studying the structure of asphalt materials and asphalt concretes is demonstrated.*     

Composite materials of diamond−(Co–Cu–Sn) system with improved mechanical characteristics. Part 1. The influence of hot re-pressing on the structure and properties of diamond−(Co–Cu–Sn) composite

We have studied the structure and tribological behavior of composite materials of the diamond–(Co–Cu–Sn) system, which were produced by sintering in molds at 800°C for 1 hour with subsequent hot re-pressing. It is shown that a change of hot re-pressing conditions makes it possible to produce nanocarbide Co₃C in the diamond–metal binder transition zone, instead of particles of structurally free graphite arising during graphitization of the diamond grain surface. The presence of nanocarbide provides an essential improvement of wear resistance of the composites.