Boissonnet Germain, Chalk Christine, Nicholls John R, Bonnet Gilles, Pedraza Fernando
Laboratoire des Sciences de l'Ingénieur pour l'Environnement (LaSIE UMR-7356 CNRS), Université de La Rochelle, Avenue Michel Crépeau, 17042 La Rochelle, France.
Surface Engineering and Nanotechnology Institute (SENTi), Cranfield University, College Rd., Wharley End, Bedford MK43 0AL, UK.
Materials (Basel). 2020 Oct 1;13(19):4382. doi: 10.3390/ma13194382.
The impact of small deposits of calcium-magnesium-aluminium silicates (CMAS) on the top of thermal barrier coatings (TBCs) made of yttria-stabilised zirconia (YSZ) produced via electron-beam physical vapour deposition (EB-PVD) is shown to play a role in the microstructural and chemical stability of the coatings; hence, it also affects the thermal insulation potential of TBCs. Therefore, the present work investigates the degradation potential of minor CMAS deposits (from 0.25 to 5 mg·cm) annealed at 1250 °C for 1 h on a novel ErO-YO co-stabilised ZrO (ErYSZ) EB-PVD TBC, which is compared to the standard YSZ coating. Due to the higher reactivity of ErYSZ coatings with CMAS, its penetration is limited in comparison with the standard YSZ coatings, hence resulting in a better thermal insulation of the former after ageing.
研究表明，通过电子束物理气相沉积（EB-PVD）制备的氧化钇稳定氧化锆（YSZ）热障涂层（TBC）顶部的少量钙镁铝硅酸盐（CMAS）沉积物，会对涂层的微观结构和化学稳定性产生影响；因此，它也会影响TBC的隔热潜力。因此，本研究调查了在新型ErO-YO共稳定ZrO（ErYSZ）EB-PVD TBC上，在1250°C退火1小时的少量CMAS沉积物（0.25至5 mg·cm）的降解潜力，并与标准YSZ涂层进行了比较。由于ErYSZ涂层与CMAS的反应性更高，与标准YSZ涂层相比，其渗透受到限制，因此老化后前者的隔热效果更好。
