Laser ablation of advanced ceramics and glass-ceramic materials: Reference position dependence

Sola, D.; Escartín, A.; Cases, R.; Peña, José

doi:10.1016/j.apsusc.2010.09.089

Cited by 20 publications

(17 citation statements)

References 20 publications

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“…However, for machining large areas, it is necessary to deflect the laser beam over the sample or to move the sample by using a translation stage if the laser system is not equipped with a scanning head. It was shown that, in this machining method, the maximal machined depth and removed volume were achieved by placing the sample out of focus [32,33,34]. As shown in Figure 2a, this phenomenon also holds for the case of these eutectic glasses and glass-ceramic samples.…”

Section: Resultsmentioning

confidence: 73%

“…It is worth mentioning that the machined depth for the glass-ceramic was slightly lower than for the glass, which is related to the higher hardness of the glass-ceramic, 495 HV, versus 458 HV for the glass. It was also demonstrated that there exists a close relation between the ablation yields and the material hardness, such that the harder the material is, the lower the ablation yields [32,34]. Figure 2b depicts that, although the machined depth increased with the number of iterations, the average depth decreased for a number of iterations higher than 40.…”

Section: Resultsmentioning

confidence: 97%

“…In Figure 2a it can be observed that the maximal machined depth was achieved by placing the sample out of focus, specifically at −2 mm. As previously reported, the machined depth and the removed volume depend on the laser machining method [28,32,33,34]. When the samples were machined by using the percussion technique—i.e., delivering the whole laser pulses over the same area—the maximal machined depth and removed volume were achieved when the surface of the sample was placed at the focal plane.…”

Section: Resultsmentioning

confidence: 98%

See 2 more Smart Citations

Laser Machining and In Vitro Assessment of Wollastonite-Tricalcium Phosphate Eutectic Glasses and Glass-Ceramics

Sola

Grima

2018

Materials

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Bioactivity and ingrowth of ceramic implants is commonly enhanced by a suitable interconnected porous network. In this work, the laser machining of CaSiO3‒Ca3(PO4)2 biocompatible eutectic glass-ceramics and glasses was studied. For this purpose, 300 µm diameter craters were machined by using pulsed laser radiation at 532 nm with a pulsewidth in the nanosecond range. Machined samples were soaked in simulated body fluid for 2 months to assess the formation of a hydroxyapatite layer on the surface of the laser machined areas. The samples were manufactured by the laser floating zone technique using a CO2 laser. Morphology, composition and microstructure of the machined samples were described by Field Emission Scanning Electron Microscopy, Energy Dispersive X-ray Spectroscopy and micro-Raman Spectroscopy.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Laser Machining and In Vitro Assessment of Wollastonite-Tricalcium Phosphate Eutectic Glasses and Glass-Ceramics

Sola

Grima

2018

Materials

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“…Worth mentioning is that the volume and depth removed reach their maximum value out of focus. This behavior is independent of the substrate to be machined . The reference distance where they are reached is around 500 and 700 μm below the focal plane for 1 and 2 kHz, respectively.…”

Section: Resultsmentioning

confidence: 78%

Laser Machining and Functional Applications of Glass‐Ceramic Materials

Sola

Peña

2012

Int J Applied Ceramic Tech

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In this work a study of glass-ceramic laser machining and some functional applications are presented. Firstly, both the effect produced by the machining method as well as how the modification of the reference position influence the machining results have been studied. Secondly, blind holes and special shape cross-section blind holes have been created for functional purposes. A Q-switched Nd:YAG laser at its fundamental wavelength of 1064 nm with pulse-widths in the nanosecond range has been used. Morphology, depth, and volume obtained by machining grooves have been studied. The variation in the ablation yield when the position of the surface to be machined is modified has also been studied. The composition and microstructure of the machined areas have been described and discussed and thermal tests have been performed to check if the objectives of the functional applications have been achieved. traditional methods and it may be applied to a wide range of substrates, such as metals, ceramics, and semiconductors. 1 In the field of materials processing by laser, several methods, such as laser machining, micromachining, marking, drilling, and pulsed laser deposition, have been developed in the last two decades. 2,3 Laser processing has been incorporated in *daniel_sola@ehu.es

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“…The sample was placed 0.4 mm under the focus position to maximize the removal rate (~0.01 mm 3 /s). In this situation the area irradiated in every pulse is about 3 times larger than in focus position, but still receives enough irradiance to evaporate the material [37].…”

Section: Laser Machiningmentioning

confidence: 99%

Characterization of laser-processed thin ceramic membranes for electrolyte-supported solid oxide fuel cells

Cebollero

Lahoz

Laguna‐Bercero

et al. 2017

International Journal of Hydrogen Energy

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By laser machining we have prepared thin and self-supported yttria stabilized zirconia (YSZ) electrolytes that can be used in electrolyte-supported Solid Oxide Fuel Cells for reducing the operation temperature. The membranes, which are supported by thicker areas of the same material, have an active area of ~20 µm in thickness and up to 8 mm in diameter. Buckling limits the maximum size of the thin areas to below 1 mm, the overall effective active area being formed by multiple thin areas bounded by ribs. ElectronBackscattering Diffraction experiments determined that there are not significant strains inside the membranes and that the heat-affected zone is confined to a shallow layer of ~1-2 µm. The bending strength of the membranes decreases by ~26% as a result of the surface microcracking produced by the laser machining. The membranes have a roughness of ~2.5 µm and are coated by a layer of nanoparticles produced by the laser ablation. This coating and small roughness is not detrimental for the cathodic polarization of the cells. Conversely, the cathode polarization resistance decreases ~5% in the 650-850 ºC temperature range.

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Laser ablation of advanced ceramics and glass-ceramic materials: Reference position dependence

Cited by 20 publications

References 20 publications

Laser Machining and In Vitro Assessment of Wollastonite-Tricalcium Phosphate Eutectic Glasses and Glass-Ceramics

Laser Machining and In Vitro Assessment of Wollastonite-Tricalcium Phosphate Eutectic Glasses and Glass-Ceramics

Laser Machining and Functional Applications of Glass‐Ceramic Materials

Characterization of laser-processed thin ceramic membranes for electrolyte-supported solid oxide fuel cells

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