With the rapid development of laser technology, the protection of production equipment and personnel is of great necessity. Thermal barrier laser protection material has the advantages of a high protection threshold and a low temperature increasing rate that attracts lots of concerns. Ba_2–xSr_xSmTaO₆ (x = 0–2) was believed to have potential use as a thermal barrier laser protection material because of its low thermal conduction and good thermal stability. However, its laser damage mechanism is still unclear. Thus, in this paper, we investigated and compared the laser damage behaviors as well as the protective thresholds of Ba_2–xSr_xSmTaO₆. During the laser irradiation, all five kinds of coatings underwent similar damage processes. The coatings underwent irradiation center turning bright, grain recrystallization, and melt. Ba₂SmTaO₆ (x = 0) showed the highest protective threshold of 2000 W/cm² for 10 s, and x = 0.5 coatings showed the lowest protective threshold that was 1000 W/cm² for 26 s. BaSrSmTaO₆ (x = 1) presented the lowest value in back-surface temperature, and Ba₂SmTaO₆ was only slightly higher than it. In conclusion, because of the best laser protection performance of Ba₂SmTaO₆, it is believed to be the most potential laser protective material among the five components.

中文翻译：

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等离子喷涂Ba2-XSrxSmTaO6涂层的激光辐照行为比较

随着激光技术的飞速发展，对生产设备和人员的保护非常必要。热障激光保护材料具有保护阈值高和升温速率低的优点，引起很多关注。人们认为Ba _2–x Sr _x SmTaO ₆（x  = 0–2）具有潜在的用途，因为其导热系数低且热稳定性好。但是，其激光损伤机理仍不清楚。因此，在本文中，我们调查并比较了Ba _2–x Sr _x SmTaO ₆的激光损伤行为以及保护阈值。在激光照射过程中，所有五种涂层都经历了类似的损坏过程。涂层经过辐照中心后变亮，晶粒再结晶并熔化。Ba ₂ SmTaO ₆（x  = 0）在10 s内显示出2000 W / cm ²的最高保护阈值，而x  = 0.5涂层在26 s内显示出1000 W / cm ²的最低保护阈值。BaSrSmTaO ₆（x  = 1）在背面温度中呈最低值，而Ba ₂ SmTaO ₆仅略高于该值。总之，由于Ba ₂ SmTaO具有最佳的激光防护性能_{如图6所示}，被认为是五种成分中最有潜力的激光保护材料。