| MIN Jie,CHENG Xu-dong,WANG Xiao-bo,ZHANG Pu,ZHANG Yun-hua.Optimal Design and Performance Evaluation of Mo/WC Solar Selective Absorption Coating at Medium-High Temperature[J],46(10):194-200 |
| Optimal Design and Performance Evaluation of Mo/WC Solar Selective Absorption Coating at Medium-High Temperature |
| Received:May 20, 2017 Revised:October 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.10.028 |
| KeyWord:Mo/WC coatings selective absorption absorptivity emissivity |
| Author | Institution |
| MIN Jie |
Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan , China |
| CHENG Xu-dong |
State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing, Wuhan University of Technology, Wuhan , China |
| WANG Xiao-bo |
State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing, Wuhan University of Technology, Wuhan , China |
| ZHANG Pu |
State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing, Wuhan University of Technology, Wuhan , China |
| ZHANG Yun-hua |
Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan , China |
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| Abstract: |
| The work aims to improve selective absorption properties of WC-based thermal sprayed coating while guaranteeing its stable performance in high-temperature natural environment. The selective absorption properties of the WC-based thermal sprayed coating were improved with Mo. Optimized microstructure, selective absorption properties and weather resistance of Mo/WC coatings were evaluated emphatically. The structural feature of WC ceramic filled with Mo metal particles stabilized phase structure and high temperature performance of the coating, the absorptivity was up to 0.836～0.890, but emissivity rose to 0.493～0.594 and selective absorption properties were poor. After the treatment of Al2O3-SnO2, the absorptivity of the Mo/WC coating reached a stable level of 0.77～0.78, and emissivity first decreased and then increased as the heat treatment temperature rose. The selective absorption properties were the best and emissivity was as low as 0.168 under the heat treatment condition of 500 ℃. Thermal shock resistance and salt fog resistance of Mo/WC coatings were improved effectively as well. The selective absorption properties and adaptability to natural environment of the Mo/WC coating were effectively improved. The Mo/WC coating is beneficial to the development of clean energy solar energy utilization due to lower production cost and construction convenience. |
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