Low temperature synthesis of dense and ultrafine grained zirconium diboride compacts by reactive spark plasma sintering

Low temperature synthesis of dense and ultrafine grained zirconium diboride compacts by reactive spark plasma sintering

[Display omitted] Dense (>98%) submicron sized monolithic zirconium diboride (ZrB2) was fabricated by reactive spark plasma sintering (RSPS) of 8h ball milled Zr and B elemental mixtures at 1200°C. During RSPS, ZrB2 formed in-situ and the densification takes place by a two-step process. Plastic f...

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Veröffentlicht in:Scripta materialia 2016-01, Vol.110, p.78-81
Hauptverfasser: Karthiselva, N.S., Murty, B.S., Bakshi, Srinivasa R.
Format: Artikel
Sprache:eng
Schlagworte:
Ball milling
Borides
Densification
Indentation
Mechanical milling
Mercury intrusion porosimetry
Modulus of elasticity
Nanohardness
Nanoindentation
Spark plasma sintering
Synthesis
Zirconium
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Zusammenfassung:[Display omitted] Dense (>98%) submicron sized monolithic zirconium diboride (ZrB2) was fabricated by reactive spark plasma sintering (RSPS) of 8h ball milled Zr and B elemental mixtures at 1200°C. During RSPS, ZrB2 formed in-situ and the densification takes place by a two-step process. Plastic flow of ZrB2 resulting from application of higher pressure enhanced densification significantly. Improvement in nanohardness, elastic modulus and indentation fracture toughness were observed with increased sintering pressure.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2015.08.005