掺杂相对ZrB<sub>2</sub>陶瓷涂层抗激光烧蚀性能的影响

贺敏波; 任伟艳; 杨雨川; 邬志华; 胡月宏

doi:10.5768/JAO202344.0610003

掺杂相对ZrB₂陶瓷涂层抗激光烧蚀性能的影响

doi: 10.5768/JAO202344.0610003

河南大学人工智能学院，郑州 475000

基金项目: 十三五毁伤专项（2019JHHS2）

详细信息

作者简介:
贺敏波（1986—），男，硕士，高级工程师，主要从事激光辐照效应与机理研究。E-mail：hmb@stu.xjtu.edu.cn

中图分类号: TN249
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- 文章访问数: 58
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- 被引次数: 0
出版历程
- 收稿日期: 2023-08-16
- 修回日期: 2023-09-09
- 网络出版日期: 2023-10-21
- 刊出日期: 2023-11-22

Effect of doping phase on laser ablation resistance of ZrB₂ ceramic coatings

School of Artificial Intelligence, Henan University, Zhengzhou 475000, China

摘要

摘要: 耐高温陶瓷作为高熔点材料，具有优异的高温抗烧蚀性能，有可能满足未来抗激光防护的需求。为摸清ZrB₂陶瓷涂层抗激光防护性能，采用高功率固体激光器作为测试光源，搭建了激光烧蚀实验平台和激光耦合特性测量系统，重点对ZrB₂陶瓷涂层开展了激光烧蚀实验和涂层反射率测试。实验研究了不同激光参数条件下ZrB₂涂层抗激光烧蚀性能，以及掺杂相（SiC、MoSi₂）的影响。结果表明，相比于未掺杂ZrB₂涂层，掺杂后ZrB₂涂层抗激光烧蚀能力明显下降。分析认为掺杂相可提高ZrB₂涂层抗氧化性能，但不利于发挥氧化生成物ZrO₂的高反射和隔热作用，致使抗激光损伤阈值降低。激光损伤前后涂层反射率的测试结果，也证实了ZrO₂的高反射率是增强ZrB₂涂层抗激光损伤阈值的关键。同时，利用有限元软件建立了连续激光烧蚀下ZrB₂陶瓷涂层温度计算模型，并以基底发生熔化为判据，仿真得到了陶瓷涂层典型的抗激光烧蚀阈值参数。
- 陶瓷涂层 /
- 硼化锆 /
- 掺杂相 /
- 激光烧蚀 /
- 反射率 /
- 温度
Abstract: High temperature resistant ceramics, as high melting point materials, have excellent high-temperature ablation resistance and may meet the needs of future laser protection. In order to understand the laser protection performance of ZrB₂ ceramic coating, a high-power solid-state laser was used as the test light source, and a laser ablation experimental platform as well as laser coupling characteristic measurement system were established. The focus was on conducting laser ablation experiments and coating reflectivity tests on ZrB₂ ceramic coating. The laser ablation resistance of ZrB₂ coatings under different laser parameter conditions, and the influences of doped phases (SiC, MoSi₂) were studied by experiment. The results show that compared to the undoped ZrB₂ coating, the doped ZrB₂ coating shows a significant decrease in laser ablation resistance. The conclusion analysis suggests that the doped phase can improve the oxidation resistance of ZrB₂ coating, but it is not conducive to the high reflection and insulation effects of the oxidation product ZrO₂, resulting in a decrease in the threshold of laser damage resistance. The reflectivity test results of the coating before and after laser damage also confirms that the high reflectivity of ZrO₂ is the key to enhancing the laser damage resistance threshold of ZrB₂ coating. Meanwhile, a temperature calculation model for ZrB₂ ceramic coating under continuous laser ablation was established by using finite element software, and the typical laser ablation threshold parameters of ceramic coatings were simulated based on the criterion of substrate melting.
- ceramic coating /
- ZrB₂ /
- doped phase /
- laser ablation /
- reflectance /
- temperature

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图 1 实验光路示意图

Fig. 1 Schematic diagram of experimental system

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图 2 靶面处激光光斑分布

Fig. 2 Laser spot distribution at target surface

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图 3 反射率测量系统光路

Fig. 3 System optical path of reflectivity measurement

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图 4 ZrB₂涂层典型损伤形貌与激光参数

Fig. 4 Damage morphologies of ZrB₂ coating with typical laser parameters

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图 5 ZrB₂涂层典型损伤区域SEM形貌

Fig. 5 SEM morphology of ZrB₂ coating after laser irradiation

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图 6 ZrB₂-SiC涂层典型损伤形貌与激光参数

Fig. 6 Damage morphologies of ZrB₂-SiC coating with typical laser parameters

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图 7 ZrB₂-MoSi₂涂层典型损伤形貌与激光参数

Fig. 7 Damage morphologies of ZrB₂-MoSi₂ coating with typical laser parameters

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图 8 ZrB₂-SiC涂层典型损伤区域SEM形貌

Fig. 8 SEM morphology of ZrB₂-SiC coating after laser irradiation

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图 9 ZrB₂-MoSi₂涂层典型损伤区域SEM形貌

Fig. 9 SEM morphology of ZrB₂-MoSi₂ coating after laser irradiation

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图 10 ZrB₂涂层温度结果比较

Fig. 10 Temperature results comparison of ZrB₂ coating

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表 1 激光损伤前后涂层反射率（@1070 nm）

Table 1 Coatings reflectance before and after laser damage (@1 070 nm)

Coatings	Reflectance
Coatings	Before	After
ZrB₂	0.236	0.677（white area）
		0.292（melting area）
ZrB₂-SiC	0.098	0.545（white area）
		0.243（melting area）
ZrB₂-MoSi₂	0.171	0.072（black area）

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表 2 材料热物性参数

Table 2 Thermal physical parameters of material

Material	ρ/(kg·m⁻³)	C/(J·kg⁻¹·K⁻¹)	k/(W·m⁻¹·K⁻¹)
ZrB₂	6090	760	83
ZrO₂	4780	457	1.7
Titanium alloy	4500	703	11.8

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表 3 陶瓷涂层激光损伤阈值仿真结果

Table 3 Simulation results of laser damage threshold for ceramic coatings

Sample	Irradiation duration/s	Experimental result/(W·cm⁻²)	Simulation result/(W·cm⁻²)
ZrB₂	5	−	～1340
	10	～1222	～1200
	20	～1162	～1150
ZrB₂-SiC	5	−	～1300
	10	～1147	～1100
	20	～939	～900
ZrB₂-MoSi₂	5	−	～1150
	10	～939	～930
	20	～745	～700

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