文章信息/Info

Title:

Investigation on Laser Ablation Properties of CaCO3 Coating

作者:

李文智; 馬壯; 高麗紅; 王富恥; 王立君; 韋成華

北京理工大學材料學院；西北核技術研究所激光與物質相互作用國家重點實驗室

Author(s):

LI Wenzhi;  MA Zhuang;  GAO Lihong;  WANG Fuchi;  WANG Lijun;  WEI Chenghua

School of Material Science and Engineering, Beijing Institute of Technology；State key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology

關鍵詞:

激光防護; 激光燒蝕; CaCO3; 涂層; 熱量吸收

Keywords:

laser protection;  laser dagame;  CaCO3;  coating;  heat absorption

DOI:

10.7502/j.issn.1674-3962.2017.02.07

文獻標志碼:

A

摘要:

激光器因其自身的特點得到了長足的發展和廣泛的應用，相應的，隨著激光的軍事化應用所產生的激光威脅必須得到妥善解決，為了保護裝備及其基體不受激光損傷和破壞，激光防護必不可少。而現階段，對于大功率連續激光而言，其對材料的破壞形式主要是熱破壞，表現為被輻照材料溫度達到一定臨界點后，以氧化、熔融、氣化的形式發生不可逆的損耗，所以為了保證裝備及其基體不發生上述破壞，采用一定的方式消耗入射激光能量，進而減小激光熱量轉化和沉積使得溫度降低到材料損傷閾值以下，是可行的方式之一。因此，基于上述機制選用了一種常見的焓變涂料CaCO3作為研究對象，探究了其激光燒蝕行為和防護能力。研究結果表明，CaCO3涂層明顯降低了基體材料在激光輻照下的溫度，實現了入射激光能量的有效耗散。并經初步計算，單位面積（1 cm2）涂層可耗散0��473 kJ的能量，可降低45鋼基體溫度約53 ℃。

Abstract:

Due to its own characteristics, laser has been greatly developed and widely used. Laser threat must be resolved properly with the laser used in the military fields. To protect the substrates and equipments from threats and damage, laser protection is greatly necessary. The laser energy accumulation on the material will cause a terrible problem. At present, the main damage form is thermal destruction of high power continuous laser. When the temperature reaches the threshold of the material, the material will be consumed by oxidation, melting and evaporation. In order to ensure the substrates and equipments away from damage, decreasing the incidence laser energy is an effective way, and in turn decreasing the temperature below the threshold of the material. Therefore, in this paper, a common enthalpy change material, CaCO3, was studied. The laser damage behavior and protection ability of CaCO3 coatings were explored. The results show that the substrate back-surface temperature decreased obviously, while CaCO3 coatings with the thickness of 1 mm dissipated effectively of the incident laser energy. From calculation, 0.473 kJ energy per unit area (1 cm2) can be dissipated, and 53 ℃ can be decreased for the No.45 steel substrate, which agrees with the experimental results.