[Using moiré interferometre in the study of porcelain-fused-metal interfacial fracture mechanics].
OBJECTIVE
To evaluate the usage of moiré interferometre in porcelain-fused-metal interfacial fracture mechanics.


METHODS
Raster was produced on the surface of samples with different thickness of porcelain and metal in 5 groups. The stripes of u field and v field under different load were collected. Then the rupture tenacity Jc was calculated and the extensions of flaws were observed.


RESULTS
Stress concentration appeared around the flaws under load conditions. The stripe became denser under more load. The rupture tenacity Jc and the direction of flaw extension of each group were different.


CONCLUSIONS
Moiré interferometre can be used in the study of porcelain-fused-metal interfacial fracture mechanics and to prognosticate the direction of flaw extension.
Zhu
Zi-yuan
ZY
Dept. of Prosthodontics, The Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.
Zhang
Bao-wei
BW
Zhang
Xiu-yin
XY
Wang
Dong-mei
DM
Fang
Ru-hua
RH
Xu
Kan
K
D003799:Dental Stress Analysis / Q000379:methods*; D016876:Metal Ceramic Alloys; D013499:Surface Properties
D016876:Metal Ceramic Alloys