Structure and magnetic properties of nanocrystalline FeCuNbSiB alloys after a thermomechanical treatment

The peculiarities of the formation of a nanocrystalline structure and induced magnetic anisotropy have been studied in Fe_87?x Cu₁Nb₃Si_xB₉ alloys (x = 0, 4, 6, 8, 9.5, 11, 13.5 at. %) after thermomechanical treatment. Differences in the dynamics of the process of phase separation in the initial amorphous state, final phase composition, and magnitude and sign of induced magnetic anisotropy have been revealed depending on the initial content of silicon.     

Experimental study of the temperature stability of magnetic field sensors based on Bi12SiO20 crystals

The temperature characteristics of the conversion coefficient of the sensitive element on a fiber-optic magnetic field probe based on a Bi₁₂SiO₂₀ crystal are studied experimentally. A laboratory model of the sensitive element of a magnetic field sensor is built, and the temperature drift of the conversion coefficient is found to be ∼0.15% over the temperature interval from +15 to +70 °C. Pis’ma Zh. Tekh. Fiz. 24, 26–33 (June 12, 1998)     

Study of changes in L32 EELS ionization edges upon formation of Ni-based intermetallic compounds

EELS L₃₂ ionization edges in several Ni‐based intermetallic compounds have been studied and interpreted in terms of the distribution of electrons in the valence d‐bands. It is demonstrated that the integral EELS cross‐sections change only slightly upon the formation of intermetallic compounds and therefore the charge transfer between atoms is negligible. On the other hand, the changes in the fine energy‐loss near‐edge structure (ELNES) of the Ni L₃ edge can be readily detected indicating an important redistribution of d‐electrons at the Ni site with alloying. These features are well reproduced by ab‐initio calculations with a FLAPW method in its WIEN97 implementation. In contrast to the drastic effect of chemical environment, structural transformations in the investigated intermetallics result in smaller ELNES changes, which can be detected by only exceptional instruments with a higher energy resolution.     

Fiber-optic interferometric displacement sensor

Translated from Izmeritel'naya Tekhnika, No. 6, pp. 28–29, June, 1988.     

Typical pathology during the free immersion of a man under water

The free immersion of a man under the water is accompanied by the threat of specific disorders which could cause the drowning. The article examines the causes, conditions and mechanisms of two most frequent pathological states, i.e. the compression of thorax and loss consciousness caused by CO2 action and hypoxia. The symptoms of these states, as well as prophylactic measures and first aid recommendations are enclosed.     

Manifolds for blowout preventer equipment

Translated from Khimicheskoe i Neftaynoe Mashinostroenie, No. 11, pp. 10–12, November, 1988.