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Synthesis and chara...
Synthesis and characterization of MgAlON-BN composites
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- Zhang, Zuotai (author)
- KTH,Materialvetenskap
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- Seetharaman, Seshadri (author)
- KTH,Materialvetenskap
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Li, Wenchao (author)
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Wang, Xidong (author)
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(creator_code:org_t)
- 2013-05-23
- 2007
- English.
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In: INTERNATIONAL JOURNAL OF MATERIALS RESEARCH. - : Walter de Gruyter GmbH. - 1862-5282 .- 2195-8556. ; 98:1, s. 64-71
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
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- In the present paper the Gibbs energy of formation of MgAlON was evaluated, and on this basis the phase stability diagram of Mg-Al-O-N-B was established. Dense magnesium aluminium oxynitride-boron nitride (MgAlON-BN) composites with 0-30 vol.% BN were synthesized by hot pressing in the temperature range 1750-1850 degrees C in the phase stability region. The phase compositions of the composites analyzed by X-ray diffraction indicated that the main phases were MgAlON and h-BN and no impurities were found. The microstructures of the composites analyzed by transmission electron microscopy, scanning electron microscopy, and high-resolution electron microscopy showed that the MgAlON did not react with BN, and the latter was distributed on the grain boundary of MgAlON homogeneously. Excessive BN (> 20 vol.%) resulted in a discontinuous microstructure for MgAlON. A matrix-flushing method was employed in the quantitative X-ray diffraction analysis for the multi-component MgAlON-BN composites. The results showed that the relative MgAlON content decreased in the process of sintering MgAlON-BN composites. Thermodynamic analysis showed that some Al2O3, AlN, and MgO escaped under the reaction conditions. The lattice parameters of MgAlON in the composites have also been evaluated.
Subject headings
- NATURVETENSKAP -- Data- och informationsvetenskap -- Systemvetenskap, informationssystem och informatik (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Information Systems (hsv//eng)
Keyword
- MgAlON-BN
- thermodynamic analysis
- composites
- quantitative analysis
- Computer and systems science
- Data- och systemvetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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