title: [Using moiré interferometre in the study of porcelain-fused-metal interfacial fracture mechanics].
abstract: 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.
authors.affiliation: Dept. of Prosthodontics, The Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.
authors.forename: Zi-yuan
authors.initials: ZY
authors.lastname: Zhu
authors.forename: Bao-wei
authors.initials: BW
authors.lastname: Zhang
authors.forename: Xiu-yin
authors.initials: XY
authors.lastname: Zhang
authors.forename: Dong-mei
authors.initials: DM
authors.lastname: Wang
authors.forename: Ru-hua
authors.initials: RH
authors.lastname: Fang
authors.forename: Kan
authors.initials: K
authors.lastname: Xu
mesh_terms: D003799:Dental Stress Analysis / Q000379:methods*; D016876:Metal Ceramic Alloys; D013499:Surface Properties
chemical_list: D016876:Metal Ceramic Alloys