High-performance thermal emitters based on laser-engineered metal surfaces
High-performance thermal emitters based on laser-engineered metal surfaces
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DOI：
10.1364/ome.381668
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发表时间：
2020-02
影响因子：
2.8
通讯作者：
S. Zolotovskaya;S. Wackerow;H. Neupert;Michael Barnes;L. Cid;B. Teissandier;A. T. Fontenla;A. Abdolvand
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文献类型：
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作者：
S. Zolotovskaya;S. Wackerow;H. Neupert;Michael Barnes;L. Cid;B. Teissandier;A. T. Fontenla;A. Abdolvand
有效的热管理对于在真空下运行的所有高温系统至关重要。这种系统的冷却主要依赖于辐射热传递，需要表面的高光谱发射率，这受到表面条件的强烈影响。不锈钢在空气中的脉冲激光结构化导致光谱半球发射率值在2.5-15 µm光谱区域超过0.95。研究了表面氧化和形貌对光谱发射率以及表面结构高温稳定性的影响。激光纹理化表面的高性能稳定性在320°C下热老化研究96小时后得到证实。
Effective thermal management is of paramount importance for all high-temperature systems operating under vacuum. Cooling of such systems relies mainly on radiative heat transfer requiring high spectral emissivity of surfaces, which is strongly affected by the surface condition. Pulsed laser structuring of stainless steel in air resulted in the spectral hemispherical emissivity values exceeding 0.95 in the 2.5–15 µm spectral region. The effects of surface oxidation and topography on spectral emissivity as well as high temperature stability of the surface structures were examined. High performance stability of the laser textured surfaces was confirmed after thermal aging studies at 320°C for 96 hours.