Fabrication of Nanosized Tungsten Carbide Ceramics by Reactive Spark Plasma Sintering

Binderless tungsten carbide ceramics were produced by reactive spark plasma sintering, using tungsten nitride and carbon black as starting materials. The phase and microstructure evolution during the sintering process was investigated. It was found that the tungsten nitride decomposed into nano tung...

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Bibliographic Details
Published inJournal of the American Ceramic Society Vol. 94; no. 10; pp. 3230 - 3233
Main Authors Sun, Shi-Kuan, Kan, Yan-Mei, Zhang, Guo-Jun
Format Journal Article
LanguageEnglish
Published Columbus Blackwell Publishing Ltd 01.10.2011
Wiley Subscription Services, Inc
Subjects
Carbides
Carbon black
Ceramics
Microstructure
Nanomaterials
Nanostructure
Nitrides
Plasma sintering
Temperature
Tungsten
Tungsten carbide
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Summary:Binderless tungsten carbide ceramics were produced by reactive spark plasma sintering, using tungsten nitride and carbon black as starting materials. The phase and microstructure evolution during the sintering process was investigated. It was found that the tungsten nitride decomposed into nano tungsten with a particle size of about 25 nm firstly, and then reacted with carbon black to form carbides. Due to the high activity of the in situ formed carbides, samples could be densified at a temperature as low as 1350°C. The bulk carbides possessed an average grain size of 270 nm and Vickers’ hardness of 25.4 GPa.
Bibliography:ArticleID:JACE4813
National Natural Science Foundation of China - No. 50872141; No. 50972152
ark:/67375/WNG-WNS01677-K
istex:773E01462655C01FE1D0332F233D9BD5F0DAE250
Key Project for Fundamental Research of Shanghai - No. 09JC1415400
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ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2011.04813.x