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Article Dans Une Revue Journal of the European Ceramic Society Année : 2013

New potential for preparation of performing h-BN coatings via polymer pyrolysis in RTA furnace

Résumé

An innovative IR irradiation annealing process is used to increase the crystallization ratio of hexagonal boron nitride (h-BN) coatings on pure titanium pellets. Since the polymer pyrolysis route requires heating the green polymer at high temperature to convert it into a ceramic, the use of IR radiation furnace (compared to a resistive furnace) allows achievement of better crystallized h-BN while the substrate remains at relatively low temperature (<1000 ◦C). Annealing treatments have been performed under argon or nitrogen using either a halogen lamp or a Rapid Thermal Annealing (RTA) furnace. Advanced structural and chemical characterizations have shown a good chemical stability of the coatings. In addition, it has been revealed that samples annealed under Ar present a micro-composite structure at the interphase composed of a -layer of TiB2/TiB Ti(N)x between the coating and the substrate, whereas samples annealed under nitrogen display a simpler structure at the interphase, with only TiN.
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Dates et versions

hal-02568083 , version 1 (08-05-2020)

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Sheng Yuan, Stéphane Benayoun, Arnaud Brioude, Olivier Dezellus, Bernard Beaugiraud, et al.. New potential for preparation of performing h-BN coatings via polymer pyrolysis in RTA furnace. Journal of the European Ceramic Society, 2013, 33 (2), pp.393-402. ⟨10.1016/j.jeurceramsoc.2012.09.008⟩. ⟨hal-02568083⟩
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