Laser Shock Processing of Al-SiC Composite Coatings

Schnick, T.; Tondu, S.; Peyre, P.; Pawłowski, Lech; Steinhäuser, S.; Wielage, B.; Hofmann, Ulrike; Bartnicki, Eric

doi:10.1361/105996399770350511

Cited by 14 publications

(5 citation statements)

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“…Koichi et.al. [16], and the preliminary work from the leading author of this study [17] as well as the work of Schnick [18], are the few investigations that exist in the field of LSP of ceramics such as Si3N4 and Al2O3. Koichi et.al.…”

Section: Introductionmentioning

confidence: 99%

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Surface property modifications of silicon carbide ceramic following laser shock peening

Shukla

Nath

Wang

et al. 2017

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

“…al. [18] investigated the laser shock processing of Al + SiC particulate composite coatings. The coating was produced using a spray of powders that ranged between 100µm to 500µm over 30 samples.…”

Section: Introductionmentioning

confidence: 99%

Surface property modifications of silicon carbide ceramic following laser shock peening

Shukla

Nath

Wang

et al. 2017

Journal of the European Ceramic Society

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“…Recent studies [21][22][23] have shown that moderate levels of plastic deformation may have been induced in ceramics (under specific conditions) [24][25][26], leading to better tensile behaviour and enhanced mechanical properties (KIC and hardness) [16,27]. Other studies [28,29] confirmed the observation crack length under Vickers micro hardness indentation response, and corresponding reduction after LSP confirming the increase in ductility caused by the introduction of residual stress within the ceramics.…”

Section: Introductionmentioning

confidence: 69%

Biocompatibility and Surface Integrity of Zirconia Ceramics Treated by Laser-plasma Driven Shock-waves

Shukla¹,

Zhang²,

Shen³

et al. 2022

Recent Prog Mater

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This is a multi-disciplinary paper focused on the preliminary results of deploying laser shock treatment (LST) to ZrO2 ceramics. This work has significance in several industrial sectors for components that will benefit from strengthening. These components are, namely: dental implants; cutting and drawing tools; valves, bearings, pressure vessels, heat exchangers and high-performance scissors and knives, where modification of hard, brittle materials properties such as that of a ZrO2, can yield a performance boost. To elucidate the influence of LST on ZrO2 ceramics, an Nd: YAG laser was used, exhibiting (operating at discrete) laser energies of 17 mJ, 85 mJ and 170 mJ, a 2 mm spot size, a pulse repetition rate of 5 Hz and pulse duration of 10 ns was deployed at 532 nm wavelength. Investigation of ZrO2 ceramic surface integrity revealed a transition from a crack-free topology to a surface dominated by fractures, as the laser energy increased from 85 mJ to 170 mJ. Residual stresses obtained by incremental hole drilling (IHD) were measured to be tensile in the upper layer and the sub-surface layer. However, compression of -595 MPa was found in the sub-surface of the ZrO2 ceramic to a depth of 350 µm after LST, particularly in the transverse direction. Biological analysis metabolic activity measurements, indicated a rise in activity for all samples as the contact time increased (24 h, 3 d and 7 d). The as-received surface revealed a more limited change in metabolism, retaining similar biochemical levels during the first 3 days followed by a slight increase after a week of cultivation, bringing about significant increase in activity in all LST surfaces, relative to the as-received condition. This suggested that a ZrO2 LST exhibited enhanced cell response, particularly, after 7 days of contact-time. The overall outcome of this introductory paper, not only showed that ZrO2 ceramics, can be laser shock treated/peened, to induce some possible beneficial mechanical and physical effects, microstructural and surface topography changes, but also showed that LST can facilitate improvement in cell response to the ZrO2 ceramic. This opens-up, new prospects for treatment of ZrO2 based ceramics for biological applications such as tooth implant screws, where avoiding fractures from mechanical loading, strength enhancement, as well as biocompatibility are all important.

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“…In recent years there have been reports on the effect of surface laser treatment on aluminium and its alloys [11][12][13] and composites, with a particular focus on Al 18 B 4 O 33 -reinforced [14,15] and SiC-reinforced systems [9,10,[16][17][18]. Additional information on the effect of laser treatment of these materials can be deduced from research activities on laser welding [19][20][21].…”

Section: Introductionmentioning

confidence: 99%