Thermally Stimulated Evolution of the Surface of Ni- and Cu-Containing Plasma-Electrolytic Oxide Coatings on Titanium

Protection of Metals and Physical Chemistry of Surfaces - The effect of the temperature of annealing in air on the surface architecture and composition of oxide layers has been studied....     

关于复迭代的Julia集的注记

提出了把复迭代的Julia集及充满Julia集的概念作一定程度的拓广(原先在文献中所认为的Julia集仍是拓广后的Julia集),后指出当指定任何一个三角形区域之后,它必可是某个复迭代的Julia集。并讨论了一些相关的问题,为建立分形集合分析理论的基础进行了初步探索。     

Structure,Phase Composition and Mechanical Properties of Hot-Extruded Ti–3Al–2.5V Pipe After Vacuum Annealing

Metallurgist - The structure and properties of the hot-extruded Ti–3Al–2.5V pipe 90.0 × 20.0 mm in cross section subjected to vacuum annealing are studied using methods of macro-,...     

Mechanical Properties of Large Diameter Pipe with Increased Deformation Capacity (For Active Tectonic Fracture Zones)

Metallurgist - Results are summarized for testing the mechanical properties of pipe of strength class K60 (corresponds approximately to strength category X70) with increased deformation capacity...     

Low-Temperature Crack Resistance of Cryogenic Structures

Strength of Materials - The versions of nonlinear defining relations and characteristics of nonlinear fracture mechanics controlling and simulating the service life, survivability, and durability...     

Oxidative Torrefaction of Wood Biomass in a Layer of Mineral Filler

Journal of Engineering Physics and Thermophysics - Consideration is given to a promising approach to heat treatment of biofuel, viz. oxidative torrefaction in a layer of mineral filler. The key...     

Determining the Solubility of RaF2 in Water

Radiochemistry - The solubility of radium fluoride in water was determined. Radium was purified by the chromatographic method with a BioRad AG-50×8 (NH4+) sorbent (200–400 mesh). The...     

Corrosion Protection of Carbon Steel by a Composition Based on Natural Polysaccharide

Materials Science - It is shown that xanthan gum inhibits corrosion processes in carbon steel placed in chloride-containing media by the mechanism of adsorption. Potassium-sodium tartrate improves...     

Influence of the Composition of Electrolyte for Hard Anodizing of Aluminum on the Characteristics of Oxide Layer

Materials Science - The procedure of hard anodizing is carried out at a temperature of (– 4)–0°C for 60 min. A 20% aqueous solution of H2SO4 is used as the base electrolyte. In the...     

Shielding effectiveness of boron-containing ores in Liaoning province of China against gamma rays and thermal neutrons

In this study, the mass attenuation coefficient of boron-containing ores in the Liaoning province of China was calculated using Win XCOM software to investigate the shielding effectiveness of these ores against gamma rays. The mass attenuation coefficients were also calculated using MCNP-4 B code and compared with Win XCOM results; consequently, a good consistency between the results of Win XCOM and MCNP-4 B was observed. Furthermore, the G-P fitting method was used to evaluate the values of exposure buildup factor(EBF) in the energy range of 0.015–15 Me V up to 40 mean free paths. Among the selected ores, boron-bearing iron concentrate ore(M3)was determined to be the best gamma ray shielding ore owing to its higher values of mass attenuation coefficient and equivalent atomic number and lower value of EBF.Moreover, American Evaluated Nuclear Data File(ENDF/B-VII) was used to analyze the shielding effectivenessagainst thermal neutrons. It was determined that Szaibelyite(M2) is the best thermal neutron shielding material.This study would be useful for demonstrating the potential of boron-containing ores for applications in the field of nuclear engineering and technology.