| Fabrication and characterization of aluminum nitride/boron nitride nanocomposites by carbothermal reduction and nitridation of aluminum borate powders. | |
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MedLine Citation:
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PMID: 19198315 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In order to fabricate aluminum nitride/boron nitride (AIN/BN) nanocomposites by pressureless sintering, the present study investigated the synthesis of AIN-BN nanocomposite powders by carbothermal reduction and nitridation of aluminum borate powders. Homogeneous mixtures of alumina (Al2O3), boric acid (H3BO3), and carbon powder were used to synthesize AIN/BN nanocomposite powders containing 10 and 20 vol% BN. Aluminum borate was produced by reacting Al2O3 and B2O3 above 800 degrees C, and AIN and turbostratic BN (t-BN) were produced by reacting aluminum borate with carbon powder and nitrogen gas at 1500 degrees C. Carbothermal reduction followed by nitridation yielded an AIN/BN nanocomposite powder composed of nanosized AIN and t-BN. By pressureless sintering nanocomposite AIN/BN powders containing 5 wt% Y22O3, AIN/BN nanocomposites were obtained without compromising the high thermal conductivity and high hardness. |
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Authors:
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Takafumi Kusunose; Nobuaki Sakayanagi; Tohru Sekino; Yoichi Ando |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of nanoscience and nanotechnology Volume: 8 ISSN: 1533-4880 ISO Abbreviation: J Nanosci Nanotechnol Publication Date: 2008 Nov |
Date Detail:
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Created Date: 2009-02-09 Completed Date: 2009-03-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088195 Medline TA: J Nanosci Nanotechnol Country: United States |
Other Details:
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Languages: eng Pagination: 5846-53 Citation Subset: IM |
Affiliation:
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The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aluminum Compounds
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chemistry* Boron Compounds / chemistry* Carbon / chemistry Crystallization / methods* Hardness Hot Temperature Macromolecular Substances / chemistry Materials Testing Molecular Conformation Nanostructures / chemistry*, ultrastructure* Nanotechnology / methods* Oxidation-Reduction Particle Size Powders Surface Properties Thermal Conductivity |
| Chemical | |
Reg. No./Substance:
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0/Aluminum Compounds; 0/Boron Compounds; 0/Macromolecular Substances; 0/Powders; 10043-11-5/elbor; 12041-50-8/aluminum boride; 24304-00-5/aluminum nitride; 7440-44-0/Carbon |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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