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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Abstract

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.

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Du, J., Sanders, A. P., Jindal, V., & Chandran, K. S. R. (2016). Rapid in situ formation and densification of titanium boride (TiB) nano-ceramic via transient liquid phase in electric field activated sintering. Scripta Materialia, 123, 95–99. https://doi.org/10.1016/j.scriptamat.2016.06.010

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