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KMID : 1023420090090020153
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Journal of Dental Hygiene Science
2009 Volume.9 No. 2 p.153 ~ p.160
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SEM/EDS Evaluation of Gold Bonding Agent Applied on Non-precious Alloys and Cast CP-Ti
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Lee Jung-Hwan
Ahn Jae-Seok
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Abstract
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The purposed of this study was to investigate the effect of Gold bonding agent as intermediate layer between metal substrate and ceramic coating. Gold bonding agent used to seal off any surface porosity, to mask the greyish color of the metal, and to provide an underlying bright golden hue to the ceramic coverage. The adhesion between metal substrate and ceramic is related to diffusion of oxygen during ceramic firing. The oxide layer produced on non-precious alloy and titanium was considered to have a potentially adverse effect on metal-ceramic bonding. The oxidation characteristics of titanium and non-precious alloys are the main problem. Every group were divided into test and control groups. Control groups are carried out process of degassing for product oxide layer. Au coating was applied on each Ni-Cr, Co-Cr alloys and cp-Ti specimens with difference surface condition of degassing. Specimens surfaces and cutting plane was characterized by SEM/EDS. Results suggested that Au coating is effective barriers to protect metal oxidation during ceramic firing.
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KEYWORD
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Gold bonding agent, Au coating, Titanium, Non-precious alloy
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