Laser Prepared Cutting Tools

Wegener, Konrad; Dold, Claus; Henerichs, Marcel; Christian, Walter

doi:10.1016/j.phpro.2012.10.035

Cited by 19 publications

(7 citation statements)

References 15 publications

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“…The laser parameters used are shown in Table 1. 2 ) 7.8, 9.1, 9.9, 10.3, 11.0 Scanning speed (mm/s) 1 The CVD diamond was a rectangular sample with dimensions of 4 × 3.5 × 1.10 ± 0.02 mm. The HPHT diamond was also a rectangle, sized 3 × 3 × 1.10 ± 0.02 mm.…”

Section: Methodsmentioning

confidence: 99%

“…Diamond is an important material having various applications, ranging from cutting tools to heat spreaders in light emitting diodes (LEDs) [1,2], due to its remarkable hardness, thermal conductivity and chemical inertness [3][4][5]. These properties, however, combined with its high brittle nature, make diamond incredibly difficult to machine by conventional mechanical methods.…”

Section: Introductionmentioning

confidence: 99%

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Laser Irradiation Responses of a Single-Crystal Diamond Produced by Different Crystal Growth Methods

Takayama

Yan

2017

Applied Sciences

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Abstract:Responses of two types of single-crystal diamonds, prepared by chemical vapour deposition (CVD) and high pressure high temperature synthesis (HPHT) methods, respectively, to a nanosecond pulsed neodymium-doped yttrium aluminium garnet (Nd:YAG) laser were investigated and compared. It was found that due to the difference in the transmission rate and refractive index, the laser-induced surface/subsurface features of the two types of samples were distinctly different. For the CVD sample, destructive interference takes place on the upper surface, leading to direct ablation of smooth grooves with deposition of graphite. For the HPHT sample, however, laser-induced grooves were formed on the reverse side of the irradiation surface (namely, the lower surface) at certain laser fluences due to the constructive interference phenomenon of the laser and the high refractive index of the material. The reverse-side irradiation resulted in the formation of deep and sharp grooves with rough bottoms and insignificant deposition of graphite on the area surrounding the groove. The machining thresholds for the upper and lower surfaces of both types of diamonds were experimentally obtained and theoretically verified. The findings of this study provide important process criteria for laser machining of different kinds of diamonds. The reverse-side irradiation method enables efficient machining of deep grooves in diamonds using a lower power laser.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser Irradiation Responses of a Single-Crystal Diamond Produced by Different Crystal Growth Methods

Takayama

Yan

2017

Applied Sciences

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“…This method of production is also making its way to fabrication of identification tags on diamond and direct machining of other ultra-hard ceramic materials [151]. Fs-pulsed laser micromachining of diamond can potentially be employed for fabrication of diamond pencils or micro grinding wheels to produce the MEMS [115], light emitting diodes [152,153], precision photonic components, flat panel display components [57] including, nano-and micro-scale photonic channels. Fs-laser machining has an immense potential to be employed in the fabrication (i.e., drilling) of ultra-precise circular holes in preindented diamond anvil cell (DAC) gaskets used in DAC ultra-high-pressure devices [154,155] and photonics systems such as birefringent regions and Bragg gratings [156,157].…”

Section: Applications Of Fs-laser Micromachined Diamondmentioning

confidence: 99%

Femtosecond laser micromachining of diamond: Current research status, applications and challenges

Ali

Litvinyuk

Rybachuk

2021

Carbon

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Ultra-fast femtosecond (fs) lasers provide a unique technological opportunity to precisely and efficiently micromachine materials with minimal thermal damage owing to the reduced heat transfer into the bulk of the work material offered by short pulse duration, high laser intensity and focused optical energy delivered on a timescale shorter than the rate of thermal diffusion into the surrounding area of a beam foci. There is an increasing demand to further develop the fs-machining technology to improve the machining quality, minimize the total machining time and increase the flexibility of machining complex patterns on diamond. This article offers an overview of recent research findings on the application of fs-laser technology to micromachine diamond. The laser technology to precisely micromachine diamond is discussed and detailed, with a focus on the use of fs-laser irradiation systems and their characteristics, laser interaction with various types of diamonds, processing and the subsequent post-processing of the irradiated samples and, appropriate sample characterisation methods. Finally, the current and emerging application areas are discussed, and the challenges and the future research prospects in the fs-laser micromachining field are also identified.

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“…Diamond has attracted interest in many applications such as cutting tools [1], heat spreaders and semiconductors [2] because of its high hardness, thermal conductivity and chemical inertness [3,4]. However, its excellent properties make it difficult to machine by traditional mechanical machining methods, and there are some problems in shaping process of diamond.…”

Section: Introductionmentioning

confidence: 99%

High surface quality micro machining of monocrystalline diamond by picosecond pulsed laser

et al. 2019

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In micro machining of monocrystalline diamond by pulsed laser, unique processing characteristics appeared only under a few ten picosecond pulse duration and a certain overlap rate of laser shot. Cracks mostly propagate in parallel direction to top surface of workpiece, although the laser beam axis is perpendicular to the surface. This processed area can keep diamond structure, and its surface roughness is smaller than Ra = 0.2 µm. New laser micro machining method to keep diamond structure and small surface roughness is proposed. This method can contribute to reduce the polishing process in micro machining of diamond.Laser beam machining (LBM); Laser micro machining; Diamond

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Laser Prepared Cutting Tools

Cited by 19 publications

References 15 publications

Laser Irradiation Responses of a Single-Crystal Diamond Produced by Different Crystal Growth Methods

Laser Irradiation Responses of a Single-Crystal Diamond Produced by Different Crystal Growth Methods

Femtosecond laser micromachining of diamond: Current research status, applications and challenges

High surface quality micro machining of monocrystalline diamond by picosecond pulsed laser

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