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

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• 作者：N.S. Karthiselva ; B.S. Murty ; Srinivasa R. Bakshi ; ^{sbakshi@iitm.ac.in" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Borides ; Spark plasma sintering ; Mechanical milling ; Mercury intrusion porosimetry ; Nanoindentation
• 刊名：Scripta Materialia
• 出版年：2016
• 出版时间：1 January 2016
• 年：2016
• 卷：110
• 期：Complete
• 页码：78-81
• 全文大小：963 K

文摘

Dense (>98%) submicron sized monolithic zirconium diboride (ZrB₂) was fabricated by reactive spark plasma sintering (RSPS) of 8 h 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.