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Synthesis, sintering and characterisation of TaON materials by W.R. Matizamhuka; I. Sigalas; M. Herrmann is a Materials Science article available to read on EtoBox.

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Theoretical investigations predict that TaON is likely to possess a relatively high hardness, thus making it a candidate for application as an abrasive or cutting tool material [J.E. Lowther, Theoretical study of potential high pressure phases of TaON and quaternary ZrTaO 3 N, in press]. TaON powder was produced by nitridation of amorphousTa 2 O 5 powder in flowing ammonia in the 700-900 8C temperature range and an ammonia flow rate range of 40-50 cm 3 /min. The resulting powders were characterised in oxidation resistance by thermo-gravimetric analysis (TGA), phase purity by X-ray diffraction (XRD) and surface area by the BET method. The materials were densified under pressure using a belt type high pressure apparatus at 3-5.5 GPa in the temperature range of 920-1200 8C. The sintered samples were characterised in phase purity, Vickers macro-hardness and fracture toughness.

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Author

W.R. Matizamhuka; I. Sigalas; M. Herrmann

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0272-8842)

Published

2008

Language

EN

Field

Materials Science (Physical Sciences)