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131.
G. Ya. Vyaseleva A. A. Konopleva D. M. Torsuev R. A. Kop''ev V. P. Barabanov 《Protection of Metals》2003,39(4):389-393
The protective and insulating properties of fluoroplastic and epoxy coatings applied by high-voltage electrostatic spraying were studied. The epoxy coatings were found to be less permeable than the fluoroplastic ones, yet they cannot be used to protect metal parts in corrosive environment because of their low chemical resistance. 相似文献
132.
133.
134.
We study the resistance of stainless steels with different contents of nitrogen after plasma-arc remelting to hydrogen degradation. The dependence of the mechanical properties of steels on the content of nitrogen is quite complicated, which is explained by changes in the phase composition. In the analyzed collection of steels (Kh18AN9, Kh20AN15, Kh18AG10, and Kh18AG15), Kh18AG15 steel has the best combination of the characteristics of strength and plasticity in hydrogen. 相似文献
135.
用磁控溅射方法制备了系列 (Fe0 .86 Zr0 .0 33Nb0 .0 33B0 .0 6 8Cu0 .0 1 ) x(Al2 O3) 1 -x颗粒膜样品 ,体积百分比x从 0 .3 3~ 0 .63 ,样品厚度约为10 0nm。室温下在Fe0 .86 Zr0 .0 33Nb0 .0 33B0 .0 6 8Cu0 .0 1 体积百分比x =0 .43时得到 17.5 μΩ·cm的最大饱和霍耳电阻率 ,比纯铁磁金属提高了 3~ 4个量级。对其磁性和微结构进行了研究 ,样品霍耳电阻率随外场的变化曲线 ρxy~H与磁场平行于膜面时的磁化曲线M~H有相似性 ,说明霍尔电阻率 ρxy与磁化强度M相关。样品电阻率 ρxx随金属体积百分比x的减小而增加 ,在x =0 .43附近发生突变 ,从金属导电变为绝缘体。根据微结构和输运性质对可能的机制进行了探讨 相似文献
136.
Kapustin V. M. Bogolyubov Ya. Klimova L. Z. 《Chemistry and Technology of Fuels and Oils》1989,25(5):265-268
Chemistry and Technology of Fuels and Oils - 相似文献
137.
A. Ya. Krasovskii 《Strength of Materials》1985,17(10):1439-1446
Conclusion In 1971 there was developed in collaboration with G. S. Pisarenko a model [19] of fracture of materials representing this process as a successive series of acts of origin of a microcrack at the tip of the main crack and their subsequent merging. In [20] the proposal was made for determination of the ductile-to-brittle transition temperature as the temperature corresponding to the appearance at the crack tip at the moment of fracture of a plastic zone of maximum size in which plane strain conditions are still satisfied. In it on the basis of the earlier proposed model there was obtained a determining relationship relating the transition temperature to the basic parameters influencing it, specimen dimensions, loading rate, and structure of the material. As the result of fruitful collaboration with Professor D. Francois and the presentation by him of broad experimental data on the scale effect in the ductile brittle transition in various steels it was possible to experimentally base the relationships obtained and to propose certain relationships useful for practical purposes [7]. Since [7] is not yet known to Soviet readers, it was appropriate to first give it a brief presentation and then to develop some of its proposals to other cases not touched upon in this work.Institute of Strength Problems, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Problemy Prochnosti, No. 10, pp. 89–95, October, 1985. 相似文献
138.
A new method of coloring glazes is proposed on the basis of improvements in the technology for obtaining brightly colored
glass coatings. The method consists of a complex of physical-chemical processes (adsorption, ion-exchange, and precipitation)
which already occur at the stage of preparation of the glaze slips, containing water-soluble salts of variable-valence metals,
which imparts intense and uniform color and high-quality to calcined glass coatings.
__________
Translated from Steklo i Keramika, No. 3, pp. 21–22, March, 2007. 相似文献
139.
140.
V. Ya. Malikov P. E. Stadnik O. Ts. Sidletskiy L. N. Lisetskiy S. V. Budakovskiy N. Z. Galunov 《Instruments and Experimental Techniques》2002,45(4):576-578
The device developed allows one to measure the dielectric characteristics of solid substances and their melts at frequencies of 20–20000 Hz and in a wide temperature range of 20–250°C. The measured temperature dependencies of the dielectric permittivities of several molecular and liquid crystals (stilbene, diphenyl, naphthalene, cholesterylpelargonate, and 8OCB) are presented. 相似文献