Pulsed Laser Materials Processing, ND-YAG versus CO 2 Lasers

Olsen, Flemming Ove; Alting, Leo

doi:10.1016/s0007-8506(07)62293-8

Cited by 52 publications

(27 citation statements)

References 1 publication

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“…Pulsed CO 2 lasers can lack the pulse length or peak power when drilling metals, although high average power pulsed CO 2 lasers can have high production rates for single-pulse 'on-the-fly' drilling (Olsen and Alting, 1995). CO 2 lasers can be used and can be particularly appropriate for polymers.…”

Section: Other Laser Drilling Processesmentioning

confidence: 99%

Laser processing of medical devices

Sharp

2015

Biophotonics for Medical Applications

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Section: Other Laser Drilling Processesmentioning

confidence: 99%

Laser processing of medical devices

Sharp

2015

Biophotonics for Medical Applications

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“…are manufactured by a ceramic process that requires lower temperatures in comparison with single‐crystals ( T ≈ 1700 and 1950°C, respectively). Moreover, large parts can be manufactured (more than 10×10×2 cm) leading to more and more powerful lasers . Nd:YAG transparent ceramics can be elaborated by different ways like sintering of Nd:YAG nanopowders obtained by chemical synthesis or solid‐state reaction, or by reaction‐sintering of primary oxides powders (Al 2 O 3 , Y 2 O 3 , Nd 2 O 3 ) mixed in stoichiometric proportions .…”

Section: Introductionmentioning

confidence: 99%

Silica reactivity during reaction‐sintering of Nd:YAG transparent ceramics

et al. 2016

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Silica (SiO2) is widely used as sintering aid during vacuum sintering of YAG (Y3Al5O12)‐based transparent ceramics. These ceramics are mainly used for laser applications when they are doped with rare‐earth luminescent elements such as Yb3+ or Nd3+. By means of microstructural, chemical, dilatometry, and thermogravimetry analyses, this study has evidenced that sufficiently high amount of silica (ie above the solubility limit in YAG) forms intergranular transient liquid phase of mixed composition Y‐Al‐Si‐O that vaporizes rapidly for temperatures higher than 1350°C. As a result, silica content after sintering remains always lower than the solubility limit in YAG ceramics (ie lower than 900 ppm). Finally, vacuum sintering with an external source of gaseous Si was proven to be suitable to manufacture highly transparent Nd:YAG ceramics.

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“…The area on which focused laser beam meets the work piece surface, temperature of the irradiated spot rises so rapidly that the material first melts and then decomposes, leaving a void in the work piece. Laser power, pulse length, cutting speed was used as main parameters by Olsen et al [10] for cutting mild steel cutting using pulsed Nd: YAG and CO2 laser to perform experiments. It was observed by their study that the CO2 laser can cut faster than Nd: YAG but Nd: YAG laser serves better surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Laser Beam Micromachining– A Review

2016

Arimpie - 2016

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Abstract-Laser essentially is a coherent, monochromatic beam of electromagnetic radiation that can propagate in a straight line with negligible divergence and occur in a wide range of wavelength (ranging from ultra-violet to infrared). Lasers are widely used in manufacturing, communication, measurement and medical. Energy density of the laser beam can be altered by varying the wavelength. This property has made the lasers proficient for removing extremely small amount of material and has led to the use of lasers to manufacture very small features in work piece materials. The production of miniature features (dimensions from 1 µm to 999 µm) in sheet materials using laser machining is termed as laser micromachining.In the present study, the fundamental understanding of short and ultra-short laser ablation process has been explained. The critical analysis of various theoretical and experimental studies is used to describe the performance of laser beam micromachining (LBMM) on some of the advanced engineering materials.

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Pulsed Laser Materials Processing, ND-YAG versus CO 2 Lasers

Cited by 52 publications

References 1 publication

Laser processing of medical devices

Laser processing of medical devices

Silica reactivity during reaction‐sintering of Nd:YAG transparent ceramics

Laser Beam Micromachining– A Review

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