Crystallization accelerated by ultrasound in Pd-based metallic glasses

Ichitsubo, Tetsu; Matsubara, Eiichiro; Anazawa, K.; Nishiyama, Nobuyuki

doi:10.1016/j.jallcom.2006.08.228

Cited by 12 publications

(4 citation statements)

References 7 publications

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“…According to his report, the rapid crystallization caused by ultrasound waves is considered to enhance the nucleation process rather than the growth stage. The same ultrasound-induced crystallization has been recently reported in the metallurgy field; however, the detailed mechanism is still unclear [24][25][26].…”

Section: Discussionsupporting

confidence: 52%

Study on Enhancement of Osseointegration of the Bio-Active Titanium Implant by Low Intensive Ultrasound WaveFull Text

Kobayahsi¹

2017

IJBES

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Section: Discussionsupporting

confidence: 52%

Study on Enhancement of Osseointegration of the Bio-Active Titanium Implant by Low Intensive Ultrasound WaveFull Text

Kobayahsi¹

2017

IJBES

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“…The same ultrasound-induced crystallization has been recently reported in the metallurgy field; however, the detailed mechanism is still unclear. (27) - (29) The potential change for calcium-phosphate crystallization might occur with ultrasound vibration ; however, the frequency and intensity of vibration is also an important factor for crystallization. In the present study, the ultrasound stimulation with a short distance ( =10mm ) suffocated the formation of an apatite-like layer, in contrast to other groups.…”

Section: Discussionmentioning

confidence: 99%

Preliminary in vitro Study on Enhancement of Bone-like Hydroxyapatite Formation on Bio-active Titanium Alloy by Low-intensity Pulsed Ultrasound Waving for Early Bone Bonding

Kobayashi

Nöda

Tatematsu

2010

JBSE

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In this study, we investigated whether ultrasound wave stimulation could accelerate the bone-bonding ability of bio-active titanium alloy in vitro. Titanium alloy (α+β-Ti-6Al-4V) processed in chemical and heat treatments was used as a specimen, and soaked in simulated body fluid (SBF) under pulsed ultrasound wave for the planned time periods. The surface of samples was observed using scanning electron microscopy (SEM), energy dispersive spectroscopy, X-ray diffraction to assess the state of bone-like hydroxyapatite formation. SEM images showed that a richer and finer layer of bone-like hydroxyapatite covered the titanium surface in the ultrasound wave group as compared with the non-ultrasound group. The measurements of mass of specimens also indicated the efficiency of ultrasound waves for hydroxyapatite formation. These findings suggest that the nucleation and crystallization of apatite on bio-active material surfaces might be promoted by micro-moving and cavitation of low-intensity pulsed ultrasound waves. We propose that pulsed ultrasound stimulation has a great potential for further improvement of osseointegration and osteoconductivity for medical bio-active implants.

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“…As discussed above, ultrasound accelerates structural relaxation and crystallization 77,78 . The degree of acceleration is higher at lower temperature, and crystallization times can be shortened by several orders of magnitude 141 . Thus, at optimized temperatures, ultrasonic and related treatments may allow access to deeply relaxed states not otherwise reachable in bulk materials.…”

Section: Accessible Glassy States In the Bulkmentioning

confidence: 99%

Thermomechanical processing of metallic glasses: extending the range of the glassy state

2016

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| For crystalline metals the science, technology, and application of thermomechanical processing are established, but this is not true for glasses. Metallic glasses-because they can be plastically deformed-offer a unique opportunity to study the effects of thermomechanical treatments on the structure and properties of glasses. Depending on the rate of cooling, various glassy states can form from a liquid. Slower cooling gives states of lower enthalpy and smaller volume; such states might also be reached by annealing, which induces structural 'relaxation'. A reduction in the degree of relaxation, or 'rejuvenation', is achievable through processes such as irradiation and mechanical deformation. In this Review, we explore the extent of

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Crystallization accelerated by ultrasound in Pd-based metallic glasses

Cited by 12 publications

References 7 publications

Study on Enhancement of Osseointegration of the Bio-Active Titanium Implant by Low Intensive Ultrasound WaveFull Text

Study on Enhancement of Osseointegration of the Bio-Active Titanium Implant by Low Intensive Ultrasound WaveFull Text

Preliminary in vitro Study on Enhancement of Bone-like Hydroxyapatite Formation on Bio-active Titanium Alloy by Low-intensity Pulsed Ultrasound Waving for Early Bone Bonding

Thermomechanical processing of metallic glasses: extending the range of the glassy state

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