Influence of Material Continuity of Functionally Graded Coating on Interface Crack

Abstract:

In this paper, aiming at three material parameter functions of functionally graded coating (FGC) which have different continuities, the influence of functionally gradient coating material continuity on the fracture behaviors of the crack on the interface between the base material and coating is studied. The results show that when the functionally graded coating structure is under a tension load, if the ratio of maximum elastic modulus of the FGC to the elastic modulus of the base is less than 10, the functionally graded layer which has C02 continuity can help to improve the fracture resistance of the interface crack, and if the ratio increases continuously, the functionally graded layer which has C13 continuity can help to improve the fracture resistance of the interface crack, which is of great guiding significance for practical engineering design.

• Periodical: Advanced Materials Research (Volumes 503-504)
• Pages: 760-763
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.503-504.760
• Online since: April 2012
• Authors: Chang Qing Sun, Hua Wei, Hong Gao
• Keywords: Fracture, Functionally Graded Coating, Interface Crack, Material Continuity

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