Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates

Li, X.N.; Liang, Lihong; Xie, Junjie; Chen, Liang; Wei, Yueguang

doi:10.1016/j.surfcoat.2014.07.031

Cited by 42 publications

(27 citation statements)

References 33 publications

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“…2(a) are shown in Fig. 2(b), which shows the initiation, multiplication and saturation of the cracks in the same position and is similar to the previous reports [3,11]. Note that Figs.…”

Section: Resultssupporting

confidence: 86%

“…For the thin coating systems, tensile failure dominates and the multiple transverse cracks emergence are the main fracture mode as analyzed in Ref. [11]; thus the length of the transverse cracks was measured when the damage was evaluated.…”

Section: Resultsmentioning

confidence: 99%

“…For the thick coating systems, interface shear failure dominates and interface fracture between the coatings and the substrates is the main fracture mode [11], as shown in Fig. 3(b), and thus the length of interface crack was calculated for describing damage.…”

Section: Resultsmentioning

confidence: 99%

“…1 in Ref. [11]. The three-point bending measurements were carried out by a slight movement of the jig controlled by the mechanical testing apparatus and the load-displacement curves were obtained.…”

Section: In-situ Three-point Bending Testmentioning

confidence: 99%

“…As above indicated, researchers observed the change of the number of cracks or the crack length with strain, time, temperature or cycling number [2][3][4][7][8][9]. For thicker coatings or pre-oxidized systems, interface fracture between the coating and the substrate occurs, and the interface crack evolution was studied in particular for the coating systems under mechanical or thermal loading [7][8][9][10][11]. Recently, Zhou et al studied in detail the damage and fracture of thermal barrier coatings by coupled acoustic emission and digital image correlation techniques [12], and found a similar damage behavior as in the Renusch and Schütze's study [7].…”

Section: Introductionmentioning

confidence: 98%

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Power-law characteristics of damage and failure of ceramic coating systems under three-point bending

Liang

Liu

et al. 2016

Surface and Coatings Technology

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a b s t r a c t a r t i c l e i n f oDamage and failure of ceramic coatings bonded on alloy substrates was studied by observing crack evolution in the coating systems under in situ three-point bending tests with corresponding load-displacement curves. A damage and catastrophic failure model on the ceramic coatings was proposed based on our experimental results and the Taylor expansion of the controlling variable. The results indicate that the damage increases with increasing stress and obeys the power-law characteristics with the power exponent of 0.5, and the damage is 1 as the stress reaches the critical point corresponding to the failure of the coating systems. The damage rate increases rapidly when the stress is near the failure point and shows a power law singularity of −0.5. The experimental results of thin, thick, nanostructured, and conventional micrometer-scale microstructured coatings are all in agreement with the predictions based on the model.

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“…2(a) are shown in Fig. 2(b), which shows the initiation, multiplication and saturation of the cracks in the same position and is similar to the previous reports [3,11]. Note that Figs.…”

Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: In-situ Three-point Bending Testmentioning

confidence: 99%