Picosecond pulsed laser processing of polycrystalline diamond and cubic boron nitride composite materials

Warhanek, Maximilian; Pfaff, Josquin; Meier, Linus; Walter, Christian; Wegener, Konrad

doi:10.1117/12.2212771

Cited by 6 publications

(3 citation statements)

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“…Pulse laser ablation (PLA) is a common laser-based method used to create surface geometries on a range of materials including hard and ultra-hard composites [ 46 , 49 , 50 , 51 ]. PLA is a photo-thermal and photo-chemical process which uses a pulsed laser set at a fixed pulse duration.…”

Section: Fabrication Of Surface Texturesmentioning

confidence: 99%

“…Figure 10 depicts a critical comparison between the reported microstructural changes as a function of pulse duration from Eberle et al [ 44 ], Maximilian et al [ 50 ], Urbina et al [ 82 ], and Okuchi et al [ 62 ]. Using a picosecond pulse duration versus a microsecond one resulted in a 90% reduction in the HAZ thickness.…”

Section: Fabrication Of Surface Texturesmentioning

confidence: 99%

“… Effect of pulse duration on thermal transition in laser processing PCD (Microsecond, 100–450 μs, nanosecond, 80–125 ns, picosecond 1–10 ps, [ 44 , 50 , 62 , 82 ]). …”

Section: Figurementioning

confidence: 99%

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Laser Processing of Hard and Ultra-Hard Materials for Micro-Machining and Surface Engineering Applications

2021

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Polycrystalline diamonds, polycrystalline cubic boron nitrides and tungsten carbides are considered difficult to process due to their superior mechanical (hardness, toughness) and wear properties. This paper aims to review the recent progress in the use of lasers to texture hard and ultra-hard materials to a high and reproducible quality. The effect of wavelength, beam type, pulse duration, fluence, and scanning speed is extensively reviewed, and the resulting laser mechanisms, induced damage, surface integrity, and existing challenges discussed. The cutting performance of different textures in real applications is examined, and the key influence of texture size, texture geometry, area ratio, area density, orientation, and solid lubricants is highlighted. Pulsed laser ablation (PLA) is an established method for surface texturing. Defects include melt debris, unwanted allotropic phase transitions, recast layer, porosity, and cracking, leading to non-uniform mechanical properties and surface roughness in fabricated textures. An evaluation of the main laser parameters indicates that shorter pulse durations (ns—fs), fluences greater than the ablation threshold, and optimised multi-pass scanning speeds can deliver sufficient energy to create textures to the required depth and profile with minimal defects. Surface texturing improves the tribological performance of cutting tools in dry conditions, reducing coefficient of friction (COF), cutting forces, wear, machining temperature, and adhesion. It is evident that cutting conditions (feed speed, workpiece material) have a primary role in the performance of textured tools. The identified gaps in laser surface texturing and texture performance are detailed to provide future trends and research directions in the field.

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