West China Journal of Stomatology

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Using Moh6 Interferometre in the Study of Porcelain-Fused-Metal Interfacial Fracture Mechanics

ZHU Zi yuan1, ZHANG Bao-wei1,ZHANG Xuo-yin1,WANG Dongrnei2,FANG Rio- hna2,XU Kan1   

  1. 1.Dept .of Prosthodontics。The Ninth People's Hospital, Shanghai Second Medical Unitersity, Shanghai 200011,China;2. Dept.of Engineering MechaniGS and TeCh- nuItte,Tongji Univers妙Shanghai 200243, China
  • Received:2004-10-25 Revised:2004-10-25 Online:2004-10-20 Published:2004-10-20

Abstract:

Objective To evaluate the usage of moir>s 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“field and,field under different load were collected. Then the rupture tenacity Jc~calculated and the extensions of flaws were observed. Results Stress concentration appeared around the flaws under load conditions. The stripe became denser under ~load. The rupture tenacity Jc and the direction of flaw extension of each group were different. Conclusion Moir6 inter- ferometre can be used in the study of porcelain-fused-metal interfacial fracture mechanics and to prognosticate the direction of flaw extension.