Document Detail


Fabrication and characterization of aluminum nitride/boron nitride nanocomposites by carbothermal reduction and nitridation of aluminum borate powders.
MedLine Citation:
PMID:  19198315     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Takafumi Kusunose; Nobuaki Sakayanagi; Tohru Sekino; Yoichi Ando
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of nanoscience and nanotechnology     Volume:  8     ISSN:  1533-4880     ISO Abbreviation:  J Nanosci Nanotechnol     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2009-02-09     Completed Date:  2009-03-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088195     Medline TA:  J Nanosci Nanotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5846-53     Citation Subset:  IM    
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan.
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MeSH Terms
Descriptor/Qualifier:
Aluminum Compounds / 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:
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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