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Oxidation/corrosion of BN-based coatings, as future BN-based interphases for SiC/SiC composites

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Academic year: 2021

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Tab. 1 XRD structural parameters, thicknesses and surfaces of BN and B(Al)N flat coatings
Fig. 1 Schematic representation with enlarged view of the cross polished section (= cutting edge surface) of a multilayer model material SiC/BN/SiC (BN thickness = 4 µm or 0.5 µm) or SiC/B(Al)N/SiC (B(Al)N thickness = 0.5 µm) before oxidation
Fig. 2 Specific mass variation of SiC coatings on cellular substrates in wet air (10 kPa H 2 O, 70 kPa N 2 , 20 kPa O 2 ) at 800 °C (surface = 2.64 cm 2 ) and 1000 °C (surface = 3.46 cm 2 )
Fig. 3 Specific mass variation of thick BN coatings on flat substrates in wet air (10 kPa H 2 O, 70 kPa N 2 , 20 kPa O 2 ) at 800 °C (oxidation/corrosion perpendicular to the BN basal planes)
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