反復燒成時 陶材와 金屬 界面의 成分元素 分布 = The Elemental Distritution Along Metal-Porcelain Interface After Repeated Firings

다국어 초록 (Multilingual Abstract)

The repeated firings of metal-porcelain system is thought to affect adhesive force and esthetics due to being increased oxide layer and elemental diffusion. But, some authors suggested that it was not affected by repeated firings.
This study investigates the relationships among repeated firings, the thickness of oxide layer and elemental distribution.
For this purpose, 12 samples were made of Vera-bond alloy and Ceramco porcelain. These samples were fired according to manufacturer's recommendation and repeated firings were carried out 6 times in turn at grazing temperature.
Four samples of them were etched by 10% H_2So_4 and alalyzed by SEM and WDAX, And 8 samples were analyzed by Scanning Electron Mlcroscope, EDAX(Energy Dispersive Analysis of X-ray), and WDAX(Wavelength Dispersive analysis of X-ray),
The obtained results were as follows ;
1. There was no distinguishable chang in the thickness of oxide layer in interface, but it was increased in backside of metal matrix according to repeated firings.
2. The diffusion profiles of Ni and Cr were not altered approximately by repeated firings.
3. The diffusion profiles of Sn in porcelain were showed that it was concentrated near the interface according to increased times of firings, and that of Si was similar to that of Sn.
4. In properly etched samples, a distinct oxide layer was observed by SEM but it was difficult to. distinguish oxide layer from matal matrix in unetched samples.
5. The elemental diffusion of oxide layer in porcelain was produced partially.