Picosecond laser bonding of highly dissimilar materials

Carter, Richard M.; Troughton, Michael; Chen, Jianyong; Elder, Ian; Thomson, Robert R.; Lamb, Robert A.; Esser, M. J. Daniel; Hand, Duncan Paul

doi:10.1117/12.2242039

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…The material in the vicinity of the plasma region melts or even evaporates due to thermal diffusion. Subsequently, plasma mixing and cooling, accompanied by irreversible thermal expansion of the melt, occurs at the interface around the focal volume [15,34]. After resolidification, the two substrates will be joined together.…”

Section: Mechanisms Of Ultrafast Laser Microweldingmentioning

confidence: 99%

“…One of the common challenges faced during ultrafast laser microwelding of THB materials is the need for pre-processing to achieve optical contact between the two substrates [43,58]. For microwelding to be successful, the plasma and splashed melt must be confined, especially during THB material-metal welding [15]. In general, this requires the two substrates to be in very close contact.…”

Section: Contact Statesmentioning

confidence: 99%

“…Since THB materials exhibit transparency in the visible (VIS) to near-infrared (NIR) spectrum, which are common wavelengths used during the laser-based process, the efficiency of laser energy deposition is extremely low, which makes traditional laser welding technologies unable to join THB materials without the assistance of a light-absorbing intermediate layer [14]. Ultrafast (UF) laser technology can trigger linear absorption in the opaque material and nonlinear absorption in the THB material due to the extremely high peak intensity, causing a variety of processes, including melting, ablation and solidification [7,15]. This method enables a direct welding of THB materials or THB material-metals without the need for any fillers [16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

Jiang

Yang

et al. 2023

Metals

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Transparent hard and brittle (THB) materials have generated significant interest due to their excellent properties, such as wide spectral transmittance, heat resistance, chemical inactivity and high mechanical strength. To further explore the application of THB materials, it is inevitable to be confronted with a range of joining THB materials and THB material–metals. Ultrafast (UF) laser microwelding enables a new means of joining THB materials and THB material–metals, due to a localized energy deposition method, which is dominated by nonlinear absorption. This process can realize high-quality micro-zone direct joining of THB materials or THB material–metals without the assistance of a light-absorbing intermediate layer. In this paper, we review the advances in UF laser microwelding of THB materials and THB material–metals considering the last two decades, from the analysis of the interaction mechanism between UF laser and matter to the key influencing factors and practical applications of this technology. Finally, the existing problems and the future research focus of UF laser microwelding technology of THB materials and THB material–metals are discussed.

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Section: Mechanisms Of Ultrafast Laser Microweldingmentioning

confidence: 99%

Section: Contact Statesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

Jiang

Yang

et al. 2023

Metals

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Effects of surface roughness on the microstructure and mechanical properties of dissimilar sapphire/Invar36 alloy joints made by ultrashort pulsed laser micro-welding

Yang,

Jiang,

Zhang

et al. 2024

Journal of Laser Applications

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The ultrashort pulsed (USP) laser microwelding of sapphire/lnvar36 alloy controlled by the surface roughness of metal was investigated for the first time. The surface roughness (Sa) of Invar alloys gradually decreased from 0.944 to 0.029 μm from the prime surface to grounded and polished surface. However, the joint shear strength first increased and then decreased with the lowered Sa, the maximum shear strength reached 107.87 MPa at the Sa ∼ 0.131 μm. Compared to other surfaces with low Sa, the relatively high surface roughness enhanced the interfacial thermal deposition both spatially and temporally which in turn promoted the diffusion of interface elements and the formation of jagged mechanical interlocking structures. Therefore, the appropriate rough metal surface was beneficial for the enhancement of sapphire/metal dissimilar joints. This report is of great significance in simplifying the surface preparation process in the USP laser microwelding of transparent hard and brittle materials with metals, therefore promoting this technique from lab to industry.

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Picosecond laser bonding of highly dissimilar materials

Cited by 2 publications

References 8 publications

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

Effects of surface roughness on the microstructure and mechanical properties of dissimilar sapphire/Invar36 alloy joints made by ultrashort pulsed laser micro-welding

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