Nd:YAG laser machining of bioceramics

Huang, Jinxia; Huang, Yao‐Xiong

doi:10.1016/j.cap.2006.11.013

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…Many studies have involved laser machining of ceramics (Miyazaki, 1992;Kuar, A.S. et al, 2005, Samant & Dahotre, 2009Pham et al, 2007) but just few of them are concerned with bioceramic machining (Huang& Huang, 2007) The brittle nature of HAP/Ti biocomposites determines difficult machining using conventional techniques. Laser micromachining proved to be one of the most suitable techniques for attaining high material removal rates as well as good surface finish.…”

Section: Machining Of Ceramic Biocompositesmentioning

confidence: 99%

Processing and Laser Micromachining of HAP Based Biocomposites

Benga¹,

Gîngu²,

Ciupitu³

et al. 2010

Engineering the Future

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Section: Machining Of Ceramic Biocompositesmentioning

confidence: 99%

Processing and Laser Micromachining of HAP Based Biocomposites

Benga¹,

Gîngu²,

Ciupitu³

et al. 2010

Engineering the Future

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“…For that reason, laser machining is suitable for any kind of biomaterial (both hard and soft, brittle and porous) [9,12,13]. Previously, we had employed a Q-switch Nd:YAG laser for the machining of HA and CPGs, and found that the Nd:YAG laser can cut and drill the two ceramic biomaterials with satisfactory efficiency and convenience [14]. However, since Nd:YAG laser machining is based on the photo-thermal effect of the laser on the materials, it still results in some harmful thermal effects in distorting the porous structures of brittle biomaterials.…”

Section: Introductionmentioning

confidence: 99%

KrF excimer laser precision machining of hard and brittle ceramic biomaterials

Huang¹,

Lu²,

Huang³

2014

Biomed. Mater.

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KrF excimer laser precision machining of porous hard-brittle ceramic biomaterials was studied to find a suitable way of machining the materials into various desired shapes and sizes without distorting their intrinsic structure and porosity. Calcium phosphate glass ceramics (CPGs) and hydroxyapatite (HA) were chosen for the study. It was found that KrF excimer laser can cut both CPGs and HA with high efficiency and precision. The ablation rates of CPGs and HA are respectively 0.081 µm/(pulse J cm(-2)) and 0.048 µm/(pulse J cm(-2)), while their threshold fluences are individually 0.72 and 1.5 J cm(-2). The cutting quality (smoothness of the cut surface) is a function of laser repetition rate and cutting speed. The higher the repetition rate and lower the cutting speed, the better the cutting quality. A comparison between the cross sections of CPGs and HA cut using the excimer laser and using a conventional diamond cutting blade indicates that those cut by the excimer laser could retain their intrinsic porosity and geometry without distortion. In contrast, those cut by conventional machining had distorted geometry and most of their surface porosities were lost. Therefore, when cutting hard-brittle ceramic biomaterials to prepare scaffold and implant or when sectioning them for porosity evaluation, it is better to choose KrF excimer laser machining.

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Basic Properties of Nd‐Doped GYSGG Laser Crystal

Ding

Zhang

Luo

et al. 2017

Crystal Research and Technology

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In the present work, we investigated the mechanical properties (including hardness, fracture toughness, brittleness index and yield strength) of Nd 0.03 Gd 0.93 Y 2.04 Sc 2 Ga 3 O 12 (Nd:GYSGG) laser crystal using Vickers microhardness tester, for the first time. The defects morphology of Nd:GYSGG crystal were investigated by using chemical etching method with phosphoric acid etchant. The absorption spectrum of Nd:GYSGG from 300 to 2800 nm was measured at room temperature and the absorption peaks were assigned. The fluorescence lifetime of the 4 F 3/2 → 4 I 11/2 transition of Nd 3+ in GYSGG is fitted to be 221.3 μs. The three Judd-Ofelt intense parameters 2, 4, 6 were calculated to be 0.329 × 10 −20 cm 2 , 2.761 × 10 −20 cm 2 and 4.222 × 10 −20 cm 2 , respectively. All these demonstrate that Nd:GYSGG crystal is a good candidate laser material.

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Nd:YAG laser machining of bioceramics

Cited by 8 publications

References 8 publications

Processing and Laser Micromachining of HAP Based Biocomposites

Processing and Laser Micromachining of HAP Based Biocomposites

KrF excimer laser precision machining of hard and brittle ceramic biomaterials

Basic Properties of Nd‐Doped GYSGG Laser Crystal

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