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.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-235991
Biblioteca responsável:
WPRO
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>
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Difração de Raios X
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Teste de Materiais
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Microscopia Eletrônica de Varredura
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Química
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Maleabilidade
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Cristalização
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Porcelana Dentária
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Silicatos de Alumínio
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Vidro
Idioma:
Chinês
Revista:
Chinese Journal of Stomatology
Ano de publicação:
2007
Tipo de documento:
Artigo