An Experimental Study on Laser Cutting Mechanisms of Polycrystalline Diamond Compacts

Zhang, G.F.; Zhang, B.; Deng, Zhidong; Chen, J.F.

doi:10.1016/j.cirp.2007.05.049

Cited by 48 publications

(22 citation statements)

References 15 publications

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“…The model holds well but diverges at high irradiances due to over-simplification, ignoring shock wave and shock changes as well as the presence of cobalt in the PCD composite. Zhang et al (2007) carried out a comparative study into the laser cutting of PCD composites and WC using a τp = 100 μs, λ = 1064 nm and Ep = 0.3 J as well as a τp = 120 ns, λ = 0.532 nm and Ep = 1 mJ laser system. The use of longer pulse durations is attributed to greater melting effects and striations.…”

Section: Previous Workmentioning

confidence: 99%

Ablation Study of WC and PCD Composites Using 10 Picosecond and 1 Nanosecond Pulse Durations at Green and Infrared Wavelengths

Eberle

Wegener

2014

Physics Procedia

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An ablation study is carried out to compare 10 picosecond and 1 nanosecond pulse durations as well as 532 nanometre and 1064 nanometre wavelengths at each corresponding pulse duration. All laser parameters are kept constant in order to understand the influence of pulse duration and wavelength independently. The materials processed according to the electronic band structure are a metal and an insulator/metal composite, i.e. tungsten carbide and polycrystalline diamond composite respectively. After laser processing said materials, the ablation rate and surface roughness are determined. Analysis into the ablation behaviour between the various laser parameters and the materials processed is given, with a particular emphasis on the graphitisation of diamond.

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Section: Previous Workmentioning

confidence: 99%

Ablation Study of WC and PCD Composites Using 10 Picosecond and 1 Nanosecond Pulse Durations at Green and Infrared Wavelengths

Eberle

Wegener

2014

Physics Procedia

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“…Low material thickness and pulse energy gives smaller HAZ while pulse frequency has no significant effect on HAZ for laser cutting of thick sheets of nickel base superalloy [34]. Zhang et al [86] have investigated that the pulsed laser cutting using low wavelength laser with low pulse width gives less HAZ in comparison to high wavelength laser with high pulse width. Effect of beam angle during Nd:YAG laser drilling of TBC nickel superalloys show that on increasing the beam angle to surface decreases the HAZ, recast and oxide layer thickness up to 601 after that it remains almost constant (Fig.…”

Section: Metallurgical Characteristicsmentioning

confidence: 99%

Laser beam machining—A review

Dubey¹,

Yadava²

2008

International Journal of Machine Tools and Manufacture

744

230

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“…With this in mind, a material removal method that is not based on mechanical interaction between the tool and the workpiece would be much more appropriate for the shaping of diamond and related materials at a high level of geometrical detail while resulting in less mechanical damage to the diamond based structure [18]. The use of lasers for diamond through cutting is well documented [19] but recently Pulsed Laser Ablation (PLA), i.e. controlled depth material removal, has been recognized as one of the most efficient and suitable methods for the 3D shaping of diamond [20] with unique capabilities to generate micro-features/textures to support the development of advanced products made of this unique material.…”

Section: Introductionmentioning

confidence: 99%

A study of surface swelling caused by graphitisation during pulsed laser ablation of carbon allotrope with high content of sp³bounds

Cadot¹,

Billingham²,

Axinte³

2017

J. Phys. D: Appl. Phys.

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Experiments and theory are employed to investigate the laser ablation of boron doped diamond and tetrahedral amorphous carbon using nanosecond pulses. For a single pulse at low values of fluence, the laser induces a swelling of the surface due to graphitisation, whilst a high level of fluence leads to recession of the surface due to vaporization.To understand and investigate the underlying phenomena during the diamond-laser interaction, a model has been developed to reliably and quickly predict the behaviour of the surface and the thickness of the heat affected zone. The model is based on conservation of heat and mass during the laser-workpiece interaction. It consists of a one-dimensional system of non-linear equations that models the material heating, evaporation, graphitisation and plasma shielding. There is excellent agreement between numerical and experimental results for the position of the interfaces up to a high laser fluence. This model is the first to investigate the ablation of diamond that is able to capture surface swelling due to the graphitisation of the diamond layer, the graphite thickness and the amount of ablated material within a single framework. Furthermore, the model provides a novel methodology to investigate the thermal stability of diamond-like carbon films. The activation energy for tetrahedral amorphous carbon is obtained using the model with an accuracy of 3.15 +1.0 −0.22 eV.

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An Experimental Study on Laser Cutting Mechanisms of Polycrystalline Diamond Compacts

Cited by 48 publications

References 15 publications

Ablation Study of WC and PCD Composites Using 10 Picosecond and 1 Nanosecond Pulse Durations at Green and Infrared Wavelengths

Ablation Study of WC and PCD Composites Using 10 Picosecond and 1 Nanosecond Pulse Durations at Green and Infrared Wavelengths

Laser beam machining—A review

A study of surface swelling caused by graphitisation during pulsed laser ablation of carbon allotrope with high content of sp³bounds

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An Experimental Study on Laser Cutting Mechanisms of Polycrystalline Diamond Compacts

Cited by 48 publications

References 15 publications

Ablation Study of WC and PCD Composites Using 10 Picosecond and 1 Nanosecond Pulse Durations at Green and Infrared Wavelengths

Ablation Study of WC and PCD Composites Using 10 Picosecond and 1 Nanosecond Pulse Durations at Green and Infrared Wavelengths

Laser beam machining—A review

A study of surface swelling caused by graphitisation during pulsed laser ablation of carbon allotrope with high content of sp3bounds

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A study of surface swelling caused by graphitisation during pulsed laser ablation of carbon allotrope with high content of sp³bounds