Studies of the mechanical properties of TiB2-6%TaB2-1%CoB-x%mZrO2

Mechanical properties of TiB2-6% TaB2-1% CoB-x% mZrO2 (x = 0, 20, 30, 40%) were studied. The toughening mechanism, which is due to ZrO2 dispersion, includes energy-absorbing stress-induced transformation and micro-@close@ cracking about the crack tip. A metal boride such as TaB2 with the same crysta...

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Veröffentlicht in:	Journal of the European Ceramic Society 1997, Vol.17 (7), p.885-890
Hauptverfasser:	CHAUVEL KOKABI, V, SHOBU, K, WATANABE, T
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology Structural ceramics Technical ceramics
Online-Zugang:	Volltext
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Zusammenfassung:	Mechanical properties of TiB2-6% TaB2-1% CoB-x% mZrO2 (x = 0, 20, 30, 40%) were studied. The toughening mechanism, which is due to ZrO2 dispersion, includes energy-absorbing stress-induced transformation and micro-@close@ cracking about the crack tip. A metal boride such as TaB2 with the same crystal system is added in order to limit the TiB2 grain growth by forming a solid solution. The fracture toughness was determined with the SENB (Single Edge Notched Beam) and IF (Indentation Fracture) methods. Anisotropy was observed in the case of samples containing a low percentage of monoclinic zirconia because of the influence of the residual stress induced by hot-pressing. 7 refs.
ISSN:	0955-2219 1873-619X
DOI:	10.1016/s0955-2219(96)00189-6