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Title: Synthesis of ZrN–sialon composites from zircon and alumina by carbothermal reduction–nitridation

Abstract

Highlights: ► ZrN–sialon composites were directly synthesized from zircon and γ-Al{sub 2}O{sub 3}. ► The morphologies and phase compositions of products changed with the temperature. ► The comprehensive and systematic thermodynamic relation of the reaction process was analyzed comprehensively. ► This new technique for synthesizing ZrN–sialon composites can reduce the cost and energy consumption. -- Abstract: ZrN–sialon composites were synthesized from zircon and γ-Al{sub 2}O{sub 3} via carbothermal reduction–nitridation. The effects of reaction temperature on the phase compositions and product morphologies were studied. The equilibrium relationship curves of the condensed phases were drawn and the temperature dependence of the phase stability was investigated. The results show that products with different phase compositions and morphologies can be obtained at different temperatures. The optimum temperature for acquiring ZrN–sialon composites was 1550 °C. Granular ZrN and short prismatic β-sialon (Si{sub 3}Al{sub 3}O{sub 3}N{sub 5}) were formed at 1500 °C, accompanied by surplus Al{sub 2}O{sub 3} and ZrO{sub 2}. The dominant products at 1550 °C were ZrN and Si{sub 3}Al{sub 3}O{sub 3}N{sub 5}, whereas they were ZrN and 15R-SiAl{sub 4}O{sub 2}N{sub 4} at 1600 °C. β-sialon had perfect crystals with a long-column morphology, whereas 15R-SiAl{sub 4}O{sub 2}N was plate-like.

Authors:
 [1];  [1]; ; ;  [1];  [1];  [2];  [3]
  1. School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083 (China)
  2. (Australia)
  3. School of Mechanical and Chemical Engineering, The University of Western Australia, Perth, WA 6009 (Australia)
Publication Date:
OSTI Identifier:
22215561
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ALUMINIUM OXIDES; CRYSTALS; ENERGY CONSUMPTION; MICROSTRUCTURE; MORPHOLOGY; PHASE STABILITY; SYNTHESIS; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION; ZIRCON; ZIRCONIUM NITRIDES; ZIRCONIUM OXIDES

Citation Formats

Li, Yuetong, Huang, Zhaohui, E-mail: huang118@cugb.edu.cn, Xu, Youguo, Fang, Minghao, Liu, Yan-gai, Yang, Jingzhou, School of Mechanical and Chemical Engineering, The University of Western Australia, Perth, WA 6009, and Hu, Xiaozhi. Synthesis of ZrN–sialon composites from zircon and alumina by carbothermal reduction–nitridation. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.08.001.
Li, Yuetong, Huang, Zhaohui, E-mail: huang118@cugb.edu.cn, Xu, Youguo, Fang, Minghao, Liu, Yan-gai, Yang, Jingzhou, School of Mechanical and Chemical Engineering, The University of Western Australia, Perth, WA 6009, & Hu, Xiaozhi. Synthesis of ZrN–sialon composites from zircon and alumina by carbothermal reduction–nitridation. United States. doi:10.1016/J.MATERRESBULL.2012.08.001.
Li, Yuetong, Huang, Zhaohui, E-mail: huang118@cugb.edu.cn, Xu, Youguo, Fang, Minghao, Liu, Yan-gai, Yang, Jingzhou, School of Mechanical and Chemical Engineering, The University of Western Australia, Perth, WA 6009, and Hu, Xiaozhi. Thu . "Synthesis of ZrN–sialon composites from zircon and alumina by carbothermal reduction–nitridation". United States. doi:10.1016/J.MATERRESBULL.2012.08.001.
@article{osti_22215561,
title = {Synthesis of ZrN–sialon composites from zircon and alumina by carbothermal reduction–nitridation},
author = {Li, Yuetong and Huang, Zhaohui, E-mail: huang118@cugb.edu.cn and Xu, Youguo and Fang, Minghao and Liu, Yan-gai and Yang, Jingzhou and School of Mechanical and Chemical Engineering, The University of Western Australia, Perth, WA 6009 and Hu, Xiaozhi},
abstractNote = {Highlights: ► ZrN–sialon composites were directly synthesized from zircon and γ-Al{sub 2}O{sub 3}. ► The morphologies and phase compositions of products changed with the temperature. ► The comprehensive and systematic thermodynamic relation of the reaction process was analyzed comprehensively. ► This new technique for synthesizing ZrN–sialon composites can reduce the cost and energy consumption. -- Abstract: ZrN–sialon composites were synthesized from zircon and γ-Al{sub 2}O{sub 3} via carbothermal reduction–nitridation. The effects of reaction temperature on the phase compositions and product morphologies were studied. The equilibrium relationship curves of the condensed phases were drawn and the temperature dependence of the phase stability was investigated. The results show that products with different phase compositions and morphologies can be obtained at different temperatures. The optimum temperature for acquiring ZrN–sialon composites was 1550 °C. Granular ZrN and short prismatic β-sialon (Si{sub 3}Al{sub 3}O{sub 3}N{sub 5}) were formed at 1500 °C, accompanied by surplus Al{sub 2}O{sub 3} and ZrO{sub 2}. The dominant products at 1550 °C were ZrN and Si{sub 3}Al{sub 3}O{sub 3}N{sub 5}, whereas they were ZrN and 15R-SiAl{sub 4}O{sub 2}N{sub 4} at 1600 °C. β-sialon had perfect crystals with a long-column morphology, whereas 15R-SiAl{sub 4}O{sub 2}N was plate-like.},
doi = {10.1016/J.MATERRESBULL.2012.08.001},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}