Regularities of the influence of submicron ceramic powders TiО2, AlN, Cr2О3 on the tribological properties of a friction material
Friction units for automotive and special vehicles are designed to operate under friction conditions. The development of a unified understanding of the effect of the size and chemical nature of ceramic additives on the processes occurring in a friction.
Подобные документы
The novel approach to chemical design of carbon-coated Al2O3 nanoparticles with an average particle size of 8-10 nm was developed. Carbon coating was synthesised by modification of fumed alumina support with 4,4-methylenebis and its subsequent pyrolysis.
автореферат, добавлен 02.04.2014Microporous structure of outgoing and thermally modified plant-extracted carbon material. Porous system characteristics by different methods on low temperature adsorption-desorption. Сharacteristic of most effective thermal modifications form nanopores.
статья, добавлен 24.02.2016Platinum as a chemical element, six it naturally occurring isotopes. History of the discovery of this metal. Use as precious metal. Industrial applicability alloys containing platinum in catalytic converters, laboratory equipment, dentistry equipment.
презентация, добавлен 27.10.2014Dependence of the size of tannin nanocapsules on the nature of the shell. Considering the nanoparticle in guar gum having the lowest average value and the shell consisting of sodium alginate having the highest value. Properties of nanostructured tannin.
статья, добавлен 21.05.2023Selection of the composition of a simplex nutrient medium by mathematical modeling. Optimization of the biosynthetic ability of the streptomyces recifensis strain for the synthesis of amylolytic enzymes. Influence of physical and chemical factors on it.
статья, добавлен 12.05.2024The chemical structure of the polymer latexes. The influence of surfactants on the drip solution. The mechanism of anionic with a negative charge in the screed, acting as air entrainment. Hydrogen bonding, water absorption and compressive strength.
статья, добавлен 22.02.2015The study of physico-chemical properties of modified forms of natural biopolymers – carboxymethyl cellulose and xanthan gums, their ability to film formation water-soluble polymeric compositions and the influence on growth and productivity of crops.
статья, добавлен 23.02.2016Research kinetic characteristics of the initial stages of the processes of acid hydrolysis and condensation in the sol-gel systems tetraethoxysilane, ethanol-water by gas chromatography. Using quantum-chemical calculations hydrolysis parameters.
статья, добавлен 23.02.2016Carboxymethyl cellulose as the one of largest and most widely used ether. Creating a uniform distribution of reagents in the area of chemical reactions - the process which underlying the modeling of macrokinetics carboxymethylation of cellulose.
статья, добавлен 05.12.2018Thiophene derivatives, cyclopropenethiones, dithiynes, carbon disulfide in the synthesis of thienothiophenes and their analogues. Reactivity and chemical transformations. Molecular structures and physical properties fields of application thienothiophenes.
дипломная работа, добавлен 05.03.2013Film materials with ion-exchange properties based on polymer obtained by condensation of oligoepichlorohydrin epoxide and piperazine with chemical modification. Compounds that have different thermodynamic affinities with the polymer and with each other.
статья, добавлен 30.10.2016Chemical properties of organic compounds derived from ammonia. The mechanism of substitution of hydrogen for hydrocarbon radicals within molecules. Classification of the most common amines. Familiarization with the formula for the secondary amine.
презентация, добавлен 06.12.2016Kinetic regularities of epoxy resins modification by aliphatic and aromatic dibasic acids have been studied. The effective rate constants and activation energies of the reactions between epoxy resin and acids by different nature have been calculated.
статья, добавлен 30.08.2016The study of the effect of bismuth nitrate (Bi (NO3) 3) deposited on tissue samples, coated tissue was evaluated by measuring the penetration of radiation. Various properties, such as mass per unit area, material thickness and surface morphology.
статья, добавлен 06.07.2020- 40. The influence of modified methyl cellulose on the main properties of expanding cementing slurries
The effect of modified methylcellulose on the main properties of expanding cementing slurries. When cementing low-temperature wells, expanding cementing slurries based on a mixture of Portland cement and gypsum alumina cement cement (30-25% GAC) are used.
статья, добавлен 20.03.2024 Investigation of optical absorption spectra of YAG: Cr, Mg, and GGG: Cr, Mg films during high-temperature annealing in oxidation and reduction atmospheres. Factors to increase in absorption in the visible region, the charge exchange of chromium ions.
статья, добавлен 29.09.2016Properties, combustion, electron energy levels. Elemental molecular forms. Covalent, organic compounds. Hydrides, protons, acids, isotopes. Discovery and use. Role in quantum theory. Natural occurrence, production: laboratory, industrial, thermochemical.
реферат, добавлен 13.11.2009Carbon as the element essential to all of life, and hence the basis for a vast field of study. Electronegativity value of fluorine. Plastic polystyrene - important product of the hydrocarbon family. Chemical properties of carboxylic acids and esters.
доклад, добавлен 15.09.2014Study of the electrochemical behavior of various anode materials in electrolytes containing trivalent chromium salts. Semiconductor properties of electrodes. The choice of the optimum anode material for the processes of chromium from electrolytes.
статья, добавлен 30.10.2016Influence of the basic nature of finely dispersed microfillers on the kinetics of hydrate release and localization and the degree of its crystallization. Formation of contacts between particles of systems, including various modifications of gypsum.
статья, добавлен 19.02.2021Catalytic, electrical, optical and magnetic properties of cobalt sulfide. Chemical structure and application of inorganic compounds and salts the sulfurous acid. Brief description of the structure of pyrite. Methods for the synthesis of the metals.
статья, добавлен 30.07.2016The one-step procedure of simultaneous preparation of polyacrylonitrile-based carbon support and Fe-Pd bimetallic nanoparticles. The effect of synthesis conditions on the metal-carbon nanocomposite structural characteristics. The crystallite size.
статья, добавлен 27.08.2020Study the chemical modification polyglycidyl phenolformaldehyde oligomers by methacrylic acid using a catalyst benzyltriethylammonium chloride. The influence of time, temperature on the rate of reaction between compounds. A structuring chemical mixtures.
статья, добавлен 23.02.2016Ag-Ni alloy films were electrodeposited from an ammonia solution on copper substrates at various material ratios and current densities. Investigation of electrical conductivity and pH, formation of complexes with silver and nickel. X-ray diffraction.
статья, добавлен 16.01.2021Экспериментальные и теоретические результаты практического получения нитевидных кристаллов TiО2 путем окисления TiCl4 кислородом воздуха в расплаве солей NaCl, КCl. Разработка усовершенствованного реактора для производства нитевидных кристаллов TiО2.
статья, добавлен 10.12.2016