Rapid in situ formation and densification of titanium boride (TiB) nano-ceramic via transient liquid phase in electric field activated sintering

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• 作者：J. Du ; A.P. Sanders ; V. Jindal ; K.S. Ravi Chandran ; ^{Ravi.Chandran@utah.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Titanium boride ; Electric field ; Reactive sintering ; Low temperature ; Densification
• 刊名：Scripta Materialia
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：123
• 期：Complete
• 页码：95-99
• 全文大小：1221 K

文摘

Rapid in situ synthesis of bulk nanostructured titanium boride (TiB) ceramic, at the lowest possible processing temperature, is demonstrated. Using electric-field-activated-sintering (EFAS), nanoscale TiB whiskers were formed and densified uniformly throughout the volume, from a mixture of micron-sized Ti, TiB₂ and FeMo powders, at 1100 °C in 30 min and at a relatively low pressure. Microstructure and X-ray diffraction (XRD) analysis, revealing the formation of TiB whiskers in this rapid processing condition, are presented. The formation of a transitional quaternary liquid phase, facilitated by localized joule heating at particle contacts, are hypothesized as contributors to rapid and low-temperature synthesis.