邹洋,赵丽丽,游丽君,陈笑迎,于云,宋力昕.TiO2热控涂层激光辐照特性研究[J].表面技术,2019,48(6):189-194.
ZOU Yang,ZHAO Li-li,YOU Li-jun,CHEN Xiao-ying,YU Yun,SONG Li-xin.Laser Irradiation Characteristics of TiO2 Thermal Control Coatings[J].Surface Technology,2019,48(6):189-194 |
| TiO2热控涂层激光辐照特性研究 |
| Laser Irradiation Characteristics of TiO2 Thermal Control Coatings |
| 投稿时间：2018-10-05 修订日期：2019-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.06.022 |
| 中文关键词: TiO2热控涂层 表面形貌 缺陷吸收 取向生长 激光损伤阈值 光热性能 |
| 英文关键词:TiO2 thermal control coatings surface topography defect absorption preferential growth laser damage threshold photothermal performance |
| 基金项目: |
| 作者 | 单位 |
| 邹洋 | 中国科学院上海硅酸盐研究所 特种无机涂层重点实验室，上海 200050 |
| 赵丽丽 | 中国科学院上海硅酸盐研究所 特种无机涂层重点实验室，上海 200050 |
| 游丽君 | 中国科学院上海硅酸盐研究所 特种无机涂层重点实验室，上海 200050 |
| 陈笑迎 | 中国科学院上海硅酸盐研究所 特种无机涂层重点实验室，上海 200050 |
| 于云 | 中国科学院上海硅酸盐研究所 特种无机涂层重点实验室，上海 200050 |
| 宋力昕 | 中国科学院上海硅酸盐研究所 特种无机涂层重点实验室，上海 200050 |
|
| Author | Institution |
| ZOU Yang | Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
| ZHAO Li-li | Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
| YOU Li-jun | Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
| CHEN Xiao-ying | Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
| YU Yun | Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
| SONG Li-xin | Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
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| 中文摘要: |
| 目的 探究激光辐照前后TiO2热控涂层的结构和性能变化。方法 采用空气喷涂方法分别制备单层TiO2热控涂层（简称单层TiO2涂层）和双层TiO2-ZrO2热控涂层（简称双层TiO2-ZrO2涂层），分析激光辐照后两种涂层的表面形貌、晶体结构变化，在线测量激光辐照过程中两种涂层样品的背底中心温度和散射光强度变化，比较激光辐照前后两种涂层的光热性能变化等。结果 激光辐照后，涂层表面形貌发生变化，不同辐照区域出现了柱状树枝晶、平面晶等形貌，其中双层TiO2-ZrO2涂层中心区域颜色加深变黑。双层TiO2-ZrO2涂层的(110)和(220)面XRD峰值明显增强，出现取向生长现象。单层TiO2涂层的激光损伤阈值为500 W/cm2、7.2 s；双层TiO2-ZrO2涂层的激光损伤阈值为500 W/cm2、2.5 s。激光辐照后，两种涂层在1064 nm激光波段的反射率分别由辐照前的97.7%和97.3%下降到60.1%和51.0%，太阳吸收比αs明显增大，发射率εh降低。结论 表面形貌发生变化与裂纹、晶体形貌及热缺陷吸收等有关，Ti3+缺陷和氧空位缺陷浓度增大可能是导致双层TiO2-ZrO2涂层中心区域颜色加深变黑的主要原因。单层TiO2涂层的激光损伤阈值更高，与双层涂层相比，吸收的激光能量得到更有效的疏导，但双层TiO2-ZrO2涂层抗热震性能更好。激光辐照后，两种涂层的光热性能显著下降。热控涂层的抗激光损伤性能与涂层结构设计、激光辐照下涂层的宏微观结构及光热稳定性等密切相关。 |
| 英文摘要: |
| The work aims to study the structure and properties of TiO2 thermal control coatings before and after laser irradi-ation. Single-layer TiO2 and double-layer TiO2-ZrO2 thermal control coatings were prepared by air-spray method. The changes of surface morphology and the crystal structure after laser irradiation were analyzed. The changes of backside central temperature and scattering light intensity of the two coatings during laser irradiation were measured on-line, and photothermal performance of the two coatings was compared. The surface morphology of the coatings changed after irradiation, columnar dendrites and planar crystals appeared in different irradiation areas after laser irradiation, and the color of the double TiO2-ZrO2 coating center became darker. The peak value of XRD on (110) and (220) surfaces of double-layer TiO2-ZrO2 thermal control coatings increased significantly, and the preferential growth phenomenon appeared. The laser damage threshold of single-layer TiO2 coating was 500 W/cm2, 7.2 s, and that of double-layer TiO2-ZrO2 coating was 500 W/cm2, 2.5 s. After laser irradiation, the reflectivity of the two coatings at 1064 nm decreased from 97.7% to 60.1% and 97.3% to 51.0%, respectively. The solar absorption ratio αs was obviously increased and the emissivity of the two coatings decreased. The surface morphology of the coatings before and after laser irradiation is related to cracks, crystal morphology and defect absorption. The increase of Ti3+ defect and oxygen vacancy defect concentration may be the main reason for the darkening of the central region of double-layer TiO2-ZrO2 coating. The laser damage threshold of the single-layer TiO2 coating is higher, and the laser energy absorbed by the coating is more effectively dredged than that of the double-layer TiO2-ZrO2 coating, but the double-layer TiO2-ZrO2 coating has better thermal shock resistance. The photothermal performance of the two coatings decreases significantly after laser irradiation. Laser damage resistance of thermal control coatings is closely related to coating structure design and macroscopic and microscopic structures and photothermal stability of coatings during laser irradiation. |
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