Дослідження адсорбційно-структурних характеристик поверхні синтетичних алмазних порошків

• Дата: 2025
• Автори: Oлійник, Н. O., Ільницька, Г. Д., Сизоненко, O. М., Петасюк, Г. A., Торпаков, А. С., Базалій, Г. А., Заболотний, С. Д., Циба, M. M.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2025
• Теми: порошок синтетичного алмазу; мікро- та шліфпорошки; адсорбційно-структурні; фізико-хімічні; фізико-механічні та морфометричні характеристики
• Онлайн доступ: https://surfacezbir.com.ua/index.php/surface/article/view/809
• Назва журналу: Surface

The results of the study of the adsorption-structural, physicomechanical, physicochemical characteristics of micropowders of the ASM brand with a grain size of 20/14 and grinding powders of the AC20 brand with a grain size of 100/80 of synthetic diamond as-is and after modification are presented. The modification was performed by a chemical method using a nitric acid solution and pulsed treatment with high-voltage electric discharges in an aqueous medium (HVED) with subsequent chemical purification of the powder. The was determined by analyzing the isotherms of low-temperature nitrogen adsorption-desorption (77 K) at p/pS = 0.99, which were obtained on a gas adsorption analyzer NOVA 2200 "Quantachrome" (USA). The surface topography was determined using scanning microscopy methods; morphometric characteristics - using the DiaInspect. OSM device from Vollstaedt Diamant GmbH. The physicomechanical and physicochemical characteristics of the powders were determined according to state regulatory documents. It was established that the modification of micropowders and grinding powders by both methods has the same tendency to change the physicomechanical, physicochemical and adsorption-structural characteristics of the powders. The content of impurities, the value of the incombustible residue decrease specific magnetic susceptibility, the value of the specific electrical resistance increase; abrasive ability, uniformity in size, and the coefficient of surface activity. The powders before and after modification have a developed mesoporous surface structure. Modification leads to a decrease in the specific surface area of the powder; an increase in adsorption energy; the total pore volume and does not significantly change the shape of the grains. A more rounded shape and the greatest stability and uniformity are characteristic of grains after chemical modification, a rougher surface is present in grains after HVED modification.