Pang Xuming, Wei Qian, Zhou Jianxin, Ma Huiyang
School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China.
Materials (Basel). 2018 Jun 19;11(6):1037. doi: 10.3390/ma11061037.
In order to achieve cermet-based solar absorber coatings with long-term thermal stability at high temperatures, a novel single-layer, multi-scale TiC-Ni/Mo cermet coating was first prepared using laser cladding technology in atmosphere. The results show that the optical properties of the cermet coatings using laser cladding were much better than the preplaced coating. In addition, the thermal stability of the optical properties for the laser cladding coating were excellent after annealing at 650 °C for 200 h. The solar absorptance and thermal emittance of multi-scale cermet coating were 85% and 4.7% at 650 °C. The results show that multi-scale cermet materials are more suitable for solar-selective absorbing coating. In addition, laser cladding is a new technology that can be used for the preparation of spectrally-selective coatings.
为了获得在高温下具有长期热稳定性的金属陶瓷基太阳能吸收涂层，首先在大气环境中采用激光熔覆技术制备了一种新型的单层多尺度TiC-Ni/Mo金属陶瓷涂层。结果表明，激光熔覆制备的金属陶瓷涂层的光学性能远优于预置涂层。此外，激光熔覆涂层在650℃退火200 h后，其光学性能的热稳定性极佳。多尺度金属陶瓷涂层在650℃时的太阳能吸收率和热发射率分别为85%和4.7%。结果表明，多尺度金属陶瓷材料更适合用于太阳能选择性吸收涂层。此外，激光熔覆是一种可用于制备光谱选择性涂层的新技术。
