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Pressureless Sintering of Zirconium Diboride: Particle Size and Additive Effects

Journal of the American Ceramic Society, 2008-05, Vol.91 (5), p.1398-1404 [Peer Reviewed Journal]

2007 The American Ceramic Society ;2008 INIST-CNRS ;Copyright American Ceramic Society May 2008 ;ISSN: 0002-7820 ;EISSN: 1551-2916 ;DOI: 10.1111/j.1551-2916.2007.02169.x ;CODEN: JACTAW

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  • Title:
    Pressureless Sintering of Zirconium Diboride: Particle Size and Additive Effects
  • Author: Fahrenholtz, William G. ; Hilmas, Gregory E. ; Zhang, Shi C. ; Zhu, Sumin
  • Subjects: Applied sciences ; Building materials. Ceramics. Glasses ; Ceramic industries ; Ceramic sintering ; Ceramics ; Chemical industry and chemicals ; Chemical reactions ; Exact sciences and technology ; Materials science ; Structural ceramics ; Technical ceramics ; Zirconium
  • Is Part Of: Journal of the American Ceramic Society, 2008-05, Vol.91 (5), p.1398-1404
  • Description: Zirconium diboride (ZrB2) was densified by pressureless sintering using <4‐wt% boron carbide and/or carbon as sintering aids. As‐received ZrB2 with an average particle size of ∼2 μm could be sintered to ∼100% density at 1900°C using a combination of boron carbide and carbon to react with and remove the surface oxide impurities. Even though particle size reduction increased the oxygen content of the powders from ∼0.9 wt% for the as‐received powder to ∼2.0 wt%, the reduction in particle size enhanced the sinterability of the powder. Attrition‐milled ZrB2 with an average particle size of <0.5 μm was sintered to nearly full density at 1850°C using either boron carbide or a combination of boride carbide and carbon. Regardless of the starting particle size, densification of ZrB2 was not possible without the removal of oxygen‐based impurities on the particle surfaces by a chemical reaction.
  • Publisher: Malden, USA: Blackwell Publishing Inc
  • Language: English
  • Identifier: ISSN: 0002-7820
    EISSN: 1551-2916
    DOI: 10.1111/j.1551-2916.2007.02169.x
    CODEN: JACTAW
  • Source: Alma/SFX Local Collection
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