Machinable property of a novel dental mica glass-ceramic / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 750-753, 2007.
Article
Dans Chinois
| WPRIM
| ID: wpr-235991
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the machinability of a novel dental mica glass-ceramic and analyze the effect of heat-treatment on its ductile machinable behavior.</p><p><b>METHODS</b>The drilling and turning experiment were used to measure the machinabilities of the control group (feldspar ceramic Vita Mark II) and 7 experiment groups treated with different crystallization techniques. The microstructures were analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD).</p><p><b>RESULTS</b>The average drilling depths in 30 s of the experimental groups ranged from (0.5 +/- 0.1) mm to (7.1 +/- 0.8) mm. There were significant differences between the control [(0.8 +/- 0.1) mm] and the experimental groups (P < 0.05) except the group crystallized at 740 degrees C for 60 min. When crystallized at 650 degrees C (60 min), continuous band chips could formed in machining at a high velocity and cut depth. The crystal portion of this group is only about 40%.</p><p><b>CONCLUSIONS</b>This material has a satisfactory machinability. The mechanism could be attributed to a combination of the interlocked structure of mica crystals and the low viscosity of glassy phase.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Diffraction des rayons X
/
Test de matériaux
/
Microscopie électronique à balayage
/
Chimie
/
Flexibilité
/
Cristallisation
/
Porcelaine dentaire
/
Silicates d'aluminium
/
Verre
langue:
Chinois
Texte intégral:
Chinese Journal of Stomatology
Année:
2007
Type:
Article
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