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

SCRIPTA MATERIALIA

卷:123

Article

Du, J.¹  Sanders, A. P.¹  Jindal, V.¹  Chandran, K. S. Ravi¹ 

[1] Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA

关键词: Titanium boride;    Electric field;    Reactive sintering;    Low temperature;    Densification;   

DOI  :  10.1016/j.scriptamat.2016.06.010

来源: Elsevier

【 摘 要 】

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 degrees 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. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

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