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

Journal Article · Thu Oct 15 00:00:00 EDT 2015 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2015.07.007· OSTI ID:22486808

Malikova, Ekaterina; Pautova, Julia ^[1]; Gromov, Alexander ^[1]; Monogarov, Konstantin ^[1]; Larionov, Kirill ^[1]; Teipel, Ulrich ^[2]

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1. Tomsk Polytechnic University, 30, Lenin Prospekt, Tomsk 634050 (Russian Federation)
2. Fraunhofer Institute of Chemical Technology, Joseph-von-Fraunhofer Str. 7, 76327 Pfinztal (Germany)

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{sub 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)

• OSTI ID: 22486808
• Journal Information: Journal of Solid State Chemistry, Vol. 230; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

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