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Abstract To improve the thermal cycling resistance of ZrB 2 –SiC/SiC dual layer coating, MgO was added into the pack powders used to prepare ZrB 2 –SiC outer coating by… Click to show full abstract
Abstract To improve the thermal cycling resistance of ZrB 2 –SiC/SiC dual layer coating, MgO was added into the pack powders used to prepare ZrB 2 –SiC outer coating by pack cementation. The composition, microstructure and thermal cycling resistance of these coatings were studied. The results show that as-received coatings were mainly composed of SiC, ZrB 2 and Si. ZrB 2 –SiC outer coating contained 5 wt%, 7 wt%, 9 wt% MgO additive showed better thermal cycling resistance with 97.6%, 98.8% and 96.5% weight retention after 15 thermal shock cycles between 1500 °C and room temperature.
Journal Title: Ceramics International
Year Published: 2018
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