Installing magnetic keepers using laser welding

Ishikawa, Masatoshi; Kashiwabara, Toshiya; Ishida, Osamu; Ichikawa, Tetsuo

doi:10.1111/j.1532-849x.2002.00049.x

Cited by 11 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also performed under an Argon atmosphere so that it has the advantage that oxidation is minimized in the area surrounding the diameter where the laser is irradiated [ 4 ]. As such, laser welding has been proven to be a more effective technology than existing soldering methods [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

The metallurgical characteristics of non-precious alloys using Nd:YAG laser welding

2015

View full text Add to dashboard Cite

BackgroundThis study aimed to determine the effect of hardness change according to penetration depth in the laser fusing zone and observed the correlation of the microstructure as an Nd:YAG laser was irradiated to Ni-Cr alloy for dental use by setting the spot diameter size with respect to defocusing distances. In all groups, the hardness depth profiles in the laser fusing zone and heat-affecteded zone (HAZ) had larger values than those of the base metal. In addition, the hardness values in places beyond the fusing zone and the HAZ were measured as being quantitatively lower.MethodsThe alloys used in this study were Verabond 2 V, Noritake Super, and Bellabond Plus, which are commercially used non-precious dental alloys. The specimens were cut to have a plate shape with a size of 0.5 × 3.0 × 2.5 mm. This was followed by setting the Nd:YAG laser output, pulse duration, and frequency to 60 W, 10 ms, and 5 Hz, respectively. The laser was then irradiated as the spot diameter condition varied between 0.5 mm and 1.4 mm in accordance with defocusing distance from 0.0 mm to 2.0 mm. After the laser irradiation, a cross-section of the fusing zone in the specimens was observed in terms of laser melted depth, hardness depth profile, and the microstructure of each alloy.ResultsThe observation result of the diffusion of the constituent elements and microstructure using field emission scanning electron microscopy, energy dispersive spectroscopy (EDS), and electron probe micro-analyzer showed that the fusing zone revealed a much finer dendritic form than the base metal due to the self-quenching effect after laser melting, while no change in constituent elements was found although some evaporation of the main elements was observed.ConclusionsThese results suggest that each Mo and Si combined inter-metallic compounds were formed on the interdendritic area. Through this study, the laser fusing zone had better hardenability due to the inter-metallic compound and grain refinement effect.

show abstract

Section: Introductionmentioning

confidence: 99%

The metallurgical characteristics of non-precious alloys using Nd:YAG laser welding

2015

View full text Add to dashboard Cite

show abstract

“… 4 As such, laser welding has been proven to be a more effective technology than existing soldering methods. 5 , 6 …”

Section: Introductionmentioning

confidence: 99%

Observation of changes in the metallurgical characteristics of Ni-Cr alloys using Nd:YAG laser welding

Hong¹,

Choi²

2014

Journal of Dental Biomechanics

View full text Add to dashboard Cite

This study aimed to determine the effect of hardness change according to penetration depth in the laser fusing zone and observed the correlation of the microstructure as an Nd:YAG laser was irradiated to Ni-Cr alloy for dental use by setting the spot diameter size to various conditions. In all groups, the hardness depth profiles in the laser fusing zone and heat-affected zone (HAZ) had larger values than those of the base metal. In addition, the hardness values in places beyond the fusing zone and the HAZ were measured as being quantitatively lower. The observation result of the diffusion of the constituent elements and microstructure using field emission scanning electron microscopy, energy-dispersive spectroscopy, and electron probe microanalyzer showed that the fusing zone revealed a much finer dendritic form than the base metal due to the self-quenching effect after welding, while no change in constituent elements was found although some evaporation of the main elements was observed. In addition, Mo- and Si-combined intermetallic compounds were formed on the interdendritic area. Through this study, the laser fusing zone had better hardenability due to the intermetallic compound and grain refinement effect.

show abstract

The effects of XeCl laser etching of Ni–Cr alloy on bond strengths to composite resin: a comparison with sandblasting procedures

2005

View full text Add to dashboard Cite

Installing magnetic keepers using laser welding

Cited by 11 publications

References 2 publications

The metallurgical characteristics of non-precious alloys using Nd:YAG laser welding

The metallurgical characteristics of non-precious alloys using Nd:YAG laser welding

Observation of changes in the metallurgical characteristics of Ni-Cr alloys using Nd:YAG laser welding

The effects of XeCl laser etching of Ni–Cr alloy on bond strengths to composite resin: a comparison with sandblasting procedures

Contact Info

Product

Resources

About