Ni-Mo太阳光谱选择性吸收涂层的制备与性能研究  

Study on Preparation and Performance of Ni-Mo Solar Selective Absorption Coatings

作　　者：王辉[1,2] 程旭东[1,2] 万倩[1,2] 马涛[2] 王涛[2] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《表面技术》2011年第2期21-25,54,共6页Surface Technology

基　　金：国家高技术研究发展计划(863计划;2009AA05Z440)

摘　　要：以自制Ni-Mo团聚型复合粉末为喷涂原料,采用超音速火焰喷涂法制得Ni-Mo太阳光谱选择性吸收涂层,表征了复合粉末和涂层的表面形貌,涂层的组成元素、相组成和光学性能,研究了粉末粒径大小、涂层组分比例和表面处理对涂层选择性吸收性能的影响。结果表明:当所用复合粉末粒径r≤45μm,粉末中Ni,Mo质量比为7∶3时,制备的涂层选择性吸收性能较好,涂层由Ni,Mo和NiO三相组成,其表面为微不平漫射表面;将该涂层研磨处理至其表面粗糙度Ra为2.156μm时,涂层选择性吸收性能较佳,吸收率α为0.84,发射率ε为0.16;再在表面加镀减反层后,α增加至0.92,大幅提高了太阳光利用率。Ni Mo solar selective absorption coatings were prepared from self-made Ni-Mo aggregate composite powder using HVOF method. The surface morphology, phase composition, elements and optical performance of the coatings were characterized and analyzed respectively. And the influence of powder particle size, proportion of coating composition and surface treatment on the selective absorption properties of coatings were studied. The results show that when diameters of composite powder are smaller or equal to 45μm and the mass ratio of Ni and Mo in the powder is 7：3, the coating obtained exhibits better selective absorption properties. The coating consists of Ni, Mo and NiO, whose surface is a slightly rough and diffuse surface. When the surface roughness （Ra） is 2. 156 μm through grinding process, the coating shows excellent performance with a solar absorptanee （a） of 0.84 and a thermal emittance （ε） of 0.16. And adding an anti reflection layer on top of it enhances the utilization of sunlight, which makes the sample reach a solar absorptance of 0.92.

关 键 词：超音速火焰喷涂 太阳能 选择性吸收 Ni-Mo涂层 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TK519[金属学及工艺—金属学]