Use of Corundum Ceramics for Fine Milling of Various Materials

The wear resistance of corundum milling bodies developed by the authors is estimated compared to foreign analogs. It is established that domestic ceramics, with respect to its abrasion rate in milling electrocorundum and quartz sand, is not inferior to foreign ceramics. The kinetics of milling the specified materials is analyzed.__________Translated from Steklo i Keramika, No. 1, pp. 17 – 18, January, 2005.     

Development of New Generation Ceramics for Their Potential Use in Domestic Industries

A brief survey of four groups of ceramic materials with a potential for effective use in science and technology is given. Durable ceramics based on Al₂O₃ and ZrO₂ are considered and areas of application are outlined. Corundum ceramics using eutectic additives that allow the sintering to be conducted at lower temperatures are discussed; structural features and properties of new materials and areas of application are considered. The use of porous ceramic materials for filtering cells and catalyst carriers is discussed. Bioceramics with a dense and porous structure based on hydroxyapatite that find ever-increasing interest for use in medicine are considered.     

Effect of Molecular Additives on the Ignition of Methane–Air Mixtures

Combustion, Explosion, and Shock Waves - The ignition of methane–air mixtures with additives of ClF5, ClF3, OF2, and H2O2 (additive content in the mixtures  $$\le$$ 1%) is studied by...     

Predicting Functioning Processes of Uniaxially Oriented Polymeric Materials

Fibre Chemistry - Traditionally, prediction of functioning processes of uniaxially oriented polymeric materials faces objective difficulties due to inhomogeneity of the rheological structure of...     

Physical Analysis of the Creep of Polypropylene and Polyvinylidene Fluoride Threads for Medical Purposes

Fibre Chemistry - Results are given for a study and modelling of short-term creep of polypropylene and polyvinylidene fluoride threads designed for medical purposes. A physical analysis is given...     

Mechanical properties and fracture upon static tension of the high-carbon steel with different types of pearlite structure

The hardness and mechanical properties of the U10 steel (1.03 wt % C) with pearlite structures that were formed by isothermal decomposition at temperatures of 650°C (coarse-lamellar pearlite) and 500°C (fine-lamellar pearlite) as well as upon subsequent annealing of fine-lamellar pearlite at a temperature of 650°C for 10–300 min have been studied upon tensile tests. Fractures of the steel with different types of pearlite structure have been examined using scanning electron microscopy. The interrelation between the mechanical properties and the structural features and character of fracture has been analyzed for this steel with pearlite structures differing in the dispersity, morphology, and defect structure of cementite, and in the levels of solid-solution strengthening and microdistortions of the ferrite-constituent lattice.