YIN Xiu-yin,BAI Li-qing,WU Yu-ping.Research on the Bonding Strength and Fracture Morphology of the Diffusion Treated FeCrNi Coating[J],(5):64-69
Research on the Bonding Strength and Fracture Morphology of the Diffusion Treated FeCrNi Coating
Received:May 16, 2012  Revised:October 20, 2012
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KeyWord:FeCrNi coating  fracture morphology  diffusion treatment  slip band  bonding strength
        
AuthorInstitution
YIN Xiu-yin Shanghai Realman Mechanical Manufacturing Co., Ltd, Shanghai , China
BAI Li-qing Shanghai Realman Mechanical Manufacturing Co., Ltd, Shanghai , China
WU Yu-ping College of Mechanics and Materials, Hohai University, Nanjing , China
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Abstract:
      After the FeCrNi coatings(with or without NiCrAl adhesive coating)were fractured by the mechanical force, which had been diffusion treated in advance, then the fracture mechanism, the bonding states between coating and substrate and the bonding states inter particles of coating were seriously studied by observing the section SEM morphology on the fracture, and the effect mechanisms of diffusion treatment on improving the bonding strength of coating were also discussed. The coating fracture surface mainly consists of gray area and bright area, layer peeled off brittle rupture, the bonding strength of this way is very lower; Instead, the bright area turns on plenty of"slip-band" and "step-face", with the way mixed with brittle cleavage and plastic slip together.
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