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Oxidation behaviour of an aluminium nitride-hafnium diboride ceramic composite


Reference:

Mattia, D., Desmaison-Brut, M., Dimovski, S., Gogotsi, Y. and Desmaison, J., 2005. Oxidation behaviour of an aluminium nitride-hafnium diboride ceramic composite. Journal of the European Ceramic Society, 25 (10), pp. 1789-1796.

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Abstract

An aluminum nitride-hafnium diboride electroconductive particulate composite was produced via hot isostatic pressing without sintering aids. Oxidn. kinetics studies were performed up to 1350 DegC under a flow of pure oxygen using a microbalance. The reaction products were analyzed using SEM and XRD techniques. This composite had a high oxidn. resistance up to 1200 DegC. The kinetic curves had an asymptotic or paralinear shape. The formation of a protective oxide scale contg. hafnia (HfO2) and aluminum borate (Al18B4O33) phases embedded in a glassy phase was obsd. The evapn. of B2O3 was limited by the formation of refractory aluminum borate. Above 1200 DegC, morphol. observations showed the formation of a Maltese cross structure assocd. with the cracking of the oxide scale along the edges resulting in sigmoidal oxidn. kinetics and in a high oxidn. rate of the ceramic composite.

Details

Item Type Articles
CreatorsMattia, D., Desmaison-Brut, M., Dimovski, S., Gogotsi, Y. and Desmaison, J.
Uncontrolled Keywordsoxidn. behavior of electroconductive aluminum nitride-hafnium diboride ceramic composites), oxidn aluminum nitride hafnium diboride ceramic composite, ceramic composites, oxidation kinetics (oxidn. behavior of electroconductive aluminum nitride-hafnium diboride ceramic composites), electric conductors, oxidation (resistance, scale (oxide
DepartmentsFaculty of Engineering & Design > Chemical Engineering
RefereedYes
StatusPublished
ID Code910

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