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在C_f/SiC复合材料中通过喷水引导的纳米秒激光提高了薄克尔夫处理,降低了氧化和热效应

Jiayu Wang^1,2, Guangyi Zhang^1,3, Qiaoli Wang⁴

¹Key Laboratory of Aero Engine Extreme Manufacturing Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

Materials (Basel, Switzerland)

|April 24, 2025

概括

水射引导纳秒激光 (WNL) 处理为碳纤维/碳化 (C_f/SiC) 陶矩阵复合材料 (CMC) 提供了卓越的结果. 与气体辅助纳秒激光 (GNL) 方法相比,WNL处理显著减少氧化和热损伤,产生更清洁的表面.

科学领域:

材料科学材料科学材料科学
制造业工程制造工程
激光处理激光加工

背景情况:

碳纤维/碳化 (C_f/SiC) 陶矩阵复合材料 (CMC) 是以其高性能而闻名的先进材料,但由于其硬度和脆性,它们存在重大加工挑战.
在CMC中制造复杂或小尺寸的形状在传统方法中特别困难,需要先进的技术来精确地去除材料.

研究的目的:

为了比较研究气体辅助纳秒激光 (GNL) 和水射引导纳秒激光 (WNL) 处理在C_f/SiC复合材料中制造薄的有效性.
分析不同激光处理模式对加工C_f/SiC材料的表面形态,微观结构,化学成分和受热影响区域 (HAZ) 的影响.

主要方法:

纳米秒激光处理在两个模式中的应用:使用的气体辅助 (GNL) 和水喷气引导 (WNL).
表面形态,微观结构和由GNL和WNL创建的沟的化学组成的比较分析.
测量和比较单路径沟的深度和多路径加工区域的特征,包括受热影响区域 (HAZ).

主要成果:

由于有效地去除重新化的碎片,WNL加工导致氧化显著降低,并且通过有效地去除重新化的碎片,产生更清洁,更平坦的沟表面,而不是导致喷和重新造层的LNG.
液化天然气加工导致了一个更大的HAZ (约. 200微米) 和更严重的氧化,导致微观结构降解,而WNL处理产生较小的HAZ (约. 100μm) 带有最小的热损伤.
多路径的WNL加工产生了带有破碎的碳纤维和残留SiC的始终光滑和干净的裂纹表面,而GNL加工显示了氧化物颗粒和裂纹的多样性形态.

结论:

水射引导的纳秒激光处理是制造C_f/SiC复合材料中精确特征的更合适的方法,因为它对氧化和热效应的优越控制.
结果表明,WNL加工比NL加工更好地保留原始微观结构,使其成为CMC中需要高质量的表面完整性应用的首选技术.
通过WNL加工实现的减少热受影响区域和最小的表面损伤为优化基于激光制造的C_f/SiC陶矩阵复合材料提供了宝贵的见解.

关键词:

这是一种Cf/SiC复合材料.化学组成化学成分热影响区域热影响区域表面形态学表面形态学水喷式引导激光器的导航.

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