Production technology, characteristics, and some applications of electric-explosion nanopowders of metals

Лернер, М. И.; Svarovskaya, N. V.; Psakhie, S. G.; Бакина, О. В.

doi:10.1134/s1995078009110019

Cited by 57 publications

(27 citation statements)

References 6 publications

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“…The subject of inquiry is iron nanopowder («sample 1» -iron EEW) obtained applying the electric blasting method of a steel wire of the St 3 type (State Standard 380-2005) in the argon environment at gas pressure 0.2 megapascal [9]. The obtained powder was passivated by means of slow air inflow in the container with nanopowder over the period of 72 hours at 20°C.…”

Section: Experimental Setup and Methodsmentioning

confidence: 99%

The research of finely dispersed iron powder moistening applying the pH–metry method

Ikonnikova

Koltunova

et al. 2016

MATEC Web Conf.

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Abstract. This research is aimed at solving crucial problem to diagnose and prognosticate moistening of fine-grained (finely-dispersed) materials. The article considers the dependence of surface moistening from the nature of the primary acid-base center. It demonstrates the advantages of acidbase property study of the surface applying the hydrolytic adsorption method. The research of hydrolytic adsorption on the ferric oxide with a haematite structure was carried out. Ferric oxide is presented in various states (massive and in the form of oxide film on the iron core of nanometer size). The identification of the composition and structure of the ferricoxide compound was carried out applying the method of transmission electron microscopy (TEM) and X-ray diffraction analysis (XRDA). The authors found out the identity of the behavior characteristics of hydrolytic adsorption on the haematite in various states. The paper also describes the inhibition mechanism of haematite moistening, which explains its hydrophobic behavior. The material of this article can be useful for its implementation in industrial, research and school laboratories.

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Section: Experimental Setup and Methodsmentioning

confidence: 99%

The research of finely dispersed iron powder moistening applying the pH–metry method

Ikonnikova

Koltunova

et al. 2016

MATEC Web Conf.

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“…В качестве мо-дельной дисперсной фазы использовали нанопорошок алюминия с размером частиц ~50 нм, полученный ме-тодом электрического взрыва проволоки в лаборатории физикохимии высокодисперсных материалов ИФПМ СО РАН [7]. Обозначим эту фазу как nAl.…”

Section: методика экспериментаunclassified

Structure and mechanical properties of aluminum – aluminum nanoparticles composite produced by accumulative roll bonding

Ivanov¹,

Rodkevich²,

Фортуна³

et al. 2017

LoM

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A modified accumulative roll bonding (ARB) process was used to obtain ultrafine-grained aluminum matrix composite with aluminum nanoparticles produced by electric wire explosion and inserted between the bonded stripes. On the preliminary stage the pack consisting of two 1 mm thick stripes and nanopowder between them was rolled up to a significant strain level of 85 % to obtain the well bonded thin stripe. On the first main stage (the first ARB cycle) the pack consisting of two ordinary stripes and a thin one with nanoparticles was rolled and cut in half. The sheet of Al-1 %nAl composite was obtained as a result of 4 ARB cycles. For a comparison, commercial aluminum was processed under the same route without nanopowder insertion. Formation of an ultrafine-grained structure in both materials was found. Nanoparticles formed totally compacted layers between the bonded surfaces. The thickness of the layers decreased with the increase of the number of cycles, while the size of the structure elements remained unchanged. In the areas corresponding to the thin stripe inserted at final cycles of ARB, a decreased microhardness was observed owing to the less accumulated strain as compared to the ordinary stripes. The reasons for the weak effect of aluminum nanoparticles on the structure and tensile strength of the rolled products are discussed.Keywords: accumulative roll bonding, metal matrix composites, nanopowders, ultrafine-grained structure. Для формирования ультрамелкозернистого композиционного материала с алюминиевой матрицей и наночастица-ми алюминия, полученными методом электрического взрыва проволоки, введенными между сопрягаемыми пласти-нами, использован модифицированный способ многократной прокатки с сопряжением слоев. На предварительном этапе прокатывали пакет, состоящий из двух пластин толщиной 1 мм, с нанесенным нанопорошком на сопрягаемых поверхностях до значительной степени деформации (85 %) для того, чтобы получить тонкую пластину-вставку с хо-рошим сопряжением слоев. На первом основном этапе (первом цикле многократной прокатки с сопряжением слоев) формировали пакет из обычных пластин с помещением между ними тонкой пластины -вставки с наночастицами, прокатывали этот пакет и разрезали пополам. В результате 4 циклов прокатки была получена полоса композита Al-1 %nAl. Для выяснения роли наночастиц в формировании структуры и свойств композита таким же способом получали материал без введения нанопорошка. Обнаружено, что в результате описанной обработки в обоих мате-риалах формируется ультрамелкозернистая структура. Наночастицы образовывали полностью компактированные слои между сопрягаемыми пластинами. Толщина этих слоев уменьшалась с увеличением числа циклов прокатки, а размер элементов структуры в них оставался неизменным. В областях материала, соответствующих пластине -вставке, введенной на заключительных циклах прокатки, значение микротвердости снижается вследствие меньшей степени деформации, накопленной при обработке. Обсуждаются возможные причины незначительного влияния наночастиц алюминия на формирование ст...

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“…The morphology of the products due to the interaction between aluminum powders and water is usually described as fibrils [22,23]. Our research [24,25] has shown that these are nanopetals assembled into a flower-like structure. Pseudoboehmite nanopetals in the form of a flower were previously synthesized by the hydrolysis of aluminum salts in hydrothermal conditions [26].…”

Section: Introductionmentioning

confidence: 96%

Flower-shaped ALOOH nanostructures synthesized by the reaction of an AlN/Al composite nanopowder in water

Бакина

Svarovskaya

Глазкова

et al. 2015

Advanced Powder Technology

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Production technology, characteristics, and some applications of electric-explosion nanopowders of metals

Cited by 57 publications

References 6 publications

The research of finely dispersed iron powder moistening applying the pH–metry method

The research of finely dispersed iron powder moistening applying the pH–metry method

Structure and mechanical properties of aluminum – aluminum nanoparticles composite produced by accumulative roll bonding

Flower-shaped ALOOH nanostructures synthesized by the reaction of an AlN/Al composite nanopowder in water

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