准连续Ti~(3+):Al_2O_3可调谐激光的研究

本文给出了Ti~(3+):Al_2O_3的准连续可调谐激光的实验结果。采用Nd:YAG内腔倍频532nm的准连续输出作为泵浦源,得到Ti~(3+):Al_2O_3的连续可调谐输出。波长覆盖范围为685nm到821nm。最大输出功率为293mW,斜率效率为20％,在805nm处的窄谱输出功率达240mW,总体转换效举为26％。     

Hydrogen Resistance of Steels Alloyed with Nitrogen

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.     

Aggregation stability of mixtures of vacuum distillate and mazut

Chemistry and Technology of Fuels and Oils -     

Ductile-to-brittle transition temperature as a measure of the crack resistance of steels

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.     

Improvement of the technology for obtaining pigment-free brightly colored glazes

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.     

A Device for Measurements of Dielectric Characteristics of Liquid Crystalline Materials, Solid Substances, and Their Melts

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.     

发电机用DJL350磁极钢板的开发与应用

本文论述了高强度冷轧磁极板的试制性研究，应用性研究及在开生桥机组上的实施。通过与国外材料的对比，研究了材料的化学成分、力学性能、磁性能、金相组织及其与性能的关系。并对其实际应用效果进行了分析总结。     

耐高温绝缘GFRP管的真空辅助树脂传递成型工艺研究

阐述了耐高温绝缘GFRP管的成型工艺及原材料选择，并对影响成型工艺的主要因素作了理论分析及试验验证。研究表明，以TDE－85／DDS体系为为基体，以无碱无捻玻璃纤维方格布为增强材料，用VARTM工艺成型的石油勘探高性能平衡管完全满足技术要求。