Investigations of the Interface Properties between the Dental Porcelain and Ni-Cr-Mo Substrate

• Main Authors: Qi-Ming Hong, 洪啟銘
• Other Authors: Yung-Chin Yang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/2rhahk

碩士 === 國立臺北科技大學 === 材料科學與工程研究所 === 97 === This research is mainly to Ni-Cr-Mo biometal and porcelain to sinter and form the dental restore, by different preheat temperature process of substrate show interface micro-structure, bonding strength and fracture mechanism of the way make the discussion. In addition, the way spraying an opaque and ZrO2 coating on substrate by plasma spraying. We expect find out better bonding strength by changing the experiment parameters include distance between nozzle and substrate, power, roughness of substrate and thickness of coating. At the same time observe the microstructure of dental restore with bonding strength relationship. Moreover, we compare the fracture mechanism of plasma spray coating and man-made coating for more discussion. The experimental result reveals, Ni-Cr-Mo metal pre-oxidizing is limited to the influence which bonding strength, even have negative influence. The fracture is mainly the cohesive destruction that is destroyed within the porcelain, this shows there is better chemical combination between metal and porcelain; Plasma spraying which the high power for 45.8 kw, roughness of substrate Ra for 4 has superior bonding strength. The fracture is mixing cohesive destruction and adhesive destruction, and position of fracture has the tendency from porcelain to interface. Moreover, the thickness of ZrO2 coating with 40 mm has the best bonging strength, but it still limited for the strength between Ni-Cr-Mo alloy and porcelain. With the increase of spraying thickness, the fracture region transfer to the Ni11Zr9 secondary phase.