Chen Wang, Chen Cong, Shen Chen, Liao Yang, Gao Wenhai, Xie Shaoming, Liu Ke, Yuan Xupeng, Peng Yujie, Leng Yuxin
Opt Express. 2025 Jun 16;33(12):26681-26689. doi: 10.1364/OE.562967.
In current research, achieving a strong connection of dissimilar materials with significantly different thermophysical properties remains a formidable challenge. This paper presents for what we believe to be the first time the strong bonding of single-crystalline diamond and fused silica glass by femtosecond laser direct writing, which was achieved under the condition of non-optical contact. The micromorphology and elemental distribution of the welding region were characterized. The results revealed that the solidification of molten silica ejected from the glass substrate fills the gaps between diamond and glass, which could be the primary reason for the achieved connection under burst mode femtosecond laser irradiation. Meantime, the slight ablation and laser-induced periodic surface structures (LIPSSs) were observed on the diamond surface. Furthermore, the influence of the laser processing parameters on the welding strength was investigated, with the highest shear strength recorded in the shear test being 14.1 MPa.
在当前的研究中，实现具有显著不同热物理性质的异种材料之间的牢固连接仍然是一项艰巨的挑战。本文首次报道了通过飞秒激光直写实现单晶金刚石与熔融石英玻璃的牢固键合，该键合是在非光学接触条件下实现的。对焊接区域的微观形貌和元素分布进行了表征。结果表明，从玻璃基板喷出的熔融二氧化硅的凝固填充了金刚石和玻璃之间的间隙，这可能是在脉冲模式飞秒激光辐照下实现连接的主要原因。同时，在金刚石表面观察到了轻微的烧蚀和激光诱导的周期性表面结构（LIPSSs）。此外，研究了激光加工参数对焊接强度的影响，剪切试验中记录的最高剪切强度为14.1MPa。
