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Title: On the mechanism of zirconium nitride formation by zirconium, zirconia and yttria burning in air

The combustion of Zr and (Zr+ZrO{sub 2}) powdery mixtures in air was accompanied by major ZrN stabilization. The synthesis of cheap ZrN with the high yield in air was facile and utile. The influence of Y{sub 2}O{sub 3} additive on the content of ZrN the solid combustion products (SCP) was investigated. The reagents and SCP were analyzed by BET, DTA–TGA, XRD, SEM and EDS. Burning temperature was measured by thermal imager. The yield of ZrN in the SCP has been varied by the time regulation of the combustion process. The burning samples were quenched at a certain time to avoid the re-oxidation of the obtained ZrN by oxygen. The quenching of the burned (Zr+ZrO{sub 2}) samples with the Y{sub 2}O{sub 3} additive was allowed increasing the ZrN yield in SCP up to 66 wt%. The chemical mechanism of ZrN formation in air was discussed and the probable source of ZrN massive formation is suggested. - Highlights: • Combustion of Zr, (Zr+ZrO{sub 2}) and (Zr+ZrO{sub 2}+Y{sub 2}O{sub 3}) powdery mixtures in air was studied. • The new combustion phenomenon has been found: metal (Zr) chemically reacts with its oxide (ZrO{sub 2}) in the burning wave. • The effective influence of Y{submore » 2}O{sub 3} additive (2–3 wt%) on ZrN yield in combustion products is shown. • The yield of ZrN in the combustion products can be varied by the burning time regulation (quenching)« less
Authors:
;  [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [1] ;  [3] ;  [1] ;  [4] ;  [2]
  1. Tomsk Polytechnic University, 30, Lenin Prospekt, Tomsk 634050 (Russian Federation)
  2. (Germany)
  3. (Russian Federation)
  4. Fraunhofer Institute of Chemical Technology, Joseph-von-Fraunhofer Str. 7, 76327 Pfinztal (Germany)
Publication Date:
OSTI Identifier:
22486808
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 230; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DIFFERENTIAL THERMAL ANALYSIS; MIXTURES; OXYGEN; QUENCHING; REAGENTS; SCANNING ELECTRON MICROSCOPY; SOLIDS; STABILIZATION; SYNTHESIS; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY; YTTRIUM OXIDES; ZIRCONIUM; ZIRCONIUM NITRIDES; ZIRCONIUM OXIDES