О механизме химического связывания азота воздуха в условиях теплового взрыва смесей нанопорошка алюминия с оксидом тантала

Translated title of the contribution: On air nitrogen chemical bonding in heat explosion of aluminum nanopowder and tantalum oxide mixtures

Alexandra O. Chudinova, Alexander P. Ilyin, Lyudmila O. Root, Andrey V. Mostovshchikov, Sofia V. Spesivtseva, Jin Chun Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The relevance of the research. The new proposed technology for obtaining refractory nitrides has several advantages: low energy con sumption, no need for complex equipment, nitrogen is used to produce nitrides, synthesis is carried out at atmospheric pressure. The main aim of the research is to determine experimentally the composition of combustion products of aluminum nanopowder and tantalum pentoxide mixtures in air and in liquid nitrogen. Object: tantalum nitride synthesis product obtained by burning the aluminum nanopowder mixture with tantalum pentoxide in air. Methodsh: xray analysis (diffractometer Difrey401), differential thermal analysis (DTA) (thermoanalyzer SDT Q600 Instrument com pany). According to the results of the DTA the authors have calculated four parameters of activity of the mixtures: oxidation onset tem perature (T st.ox , °C), oxidation level (, %), maximal oxidation rate (v max , mg/min), specific thermal effect (Н, J/g). Results. The authors determined the parameters of activity of aluminum nanopowder with tantalum pentoxide mixtures. It is revealed that along with nitride and aluminum oxide in the products a crystalline phase of metallic tantalum is formed. The maximum yield of tan talum was 54 rel. %. It was shown experimentally that at aluminum nanopowder combustion in air, aluminum recovers tantalum pento xide, which interacts with air nitrogen to form crystalline Ta 2 N tantalum nitride. According to Xray, in the combustion products of a mix ture of aluminum nanopowder with tantalum pentoxide, the crystalline phases of and tantalum are found. At the same time, tan talum nitride was not detected when the sample was burned in liquid nitrogen.

Translated title of the contributionOn air nitrogen chemical bonding in heat explosion of aluminum nanopowder and tantalum oxide mixtures
Original languageRussian
Pages (from-to)114-121
Number of pages8
JournalBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Volume329
Issue number12
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Economic Geology
  • Management, Monitoring, Policy and Law

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