Quantitative evaluation of bonding strength for hard coatings by interfacial fatigue strength under cyclic indentation

Qiu, Longshi; Zhu, Xiaodong; Lu, Sheng; He, Guangyu; Xu, Ke

doi:10.1016/j.surfcoat.2017.02.045

Cited by 38 publications

(10 citation statements)

References 30 publications

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“…Torres and co-workers have noted that, by switching from sharp to blunter spherical indenters, there is an intrinsic suitability for examining damage evolution in bulk materials as a function of number of cycles [40] and it is possible to assess fatigue sensitivity. Qiu and coworkers have argued that very large radius probes are less suited for coating systems as the peak stresses are well into the substrate [41][42]. They, therefore, developed a repeated indentation test using a 200-micron radius probe and applied loads in the range 90-300 N.…”

Section: Tinmentioning

confidence: 99%

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Micro-impact testing of AlTiN and TiAlCrN coatings

Beake

Isern

Endrino

et al. 2019

Wear

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A novel micro-scale repetitive impact test has been developed to assess the fracture resistance of hard coatings under dynamic high strain rate loading. It is capable of significantly higher impact energies than in the nano-impact test. It retains the intrinsic depth-sensing capability of the nano-impact test enabling the progression of the damage process to be monitored throughout the test, combined with the opportunity to use indenters of less sharp geometry and still cause rapid coating failure. The micro-impact test has been used to study the resistance to impact fatigue of Al-rich PVD nitride coatings on cemented carbide. The impact fatigue mechanism has been investigated in nano-and micro-scale impact tests. Coating response was highly load-dependent. A Ti 0.25 Al 0.65 Cr 0.1 N coating with high H 3 /E 2 performed best in the nano-and micro-impact tests although it was not the hardest coating studied. The

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Section: Tinmentioning

confidence: 99%

“…Although the test was not fully instrumented, so that it was necessary to stop it to observe deformation, they were able to show enhanced sensitivity to differences in adhesion strength due to changing interlayers [41][42].…”

Section: Tinmentioning

confidence: 99%

Micro-impact testing of AlTiN and TiAlCrN coatings

Beake

Isern

Endrino

et al. 2019

Wear

View full text Add to dashboard Cite

show abstract

“…The nanoindentation tester (Model NHT2, Anton Parr, Graz, Austria) was used to test the hardness and elastic modulus of the interfacial zone between the BF and the resin matrix. The nanoindentation technique has become widely available and used extensively to study interfacial mechanisms and properties (e.g., hardness [ 42 ], bonding strength [ 43 ], interfacial properties [ 44 ]). The two most commonly measured properties when using a nanoindentation test are elastic modulus and hardness.…”

Section: Methodsmentioning

confidence: 99%

Study on the Interfacial Functionary Mechanism of Rare-Earth-Solution-Modified Bamboo-Fiber-Reinforced Resin Matrix Composites

Zheng

Gao

et al. 2018

Materials

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In this work, a new and effective treatment on bamboo fiber (BF) is presented, and its effect on the interfacial bonding properties of the BF/resin matrix was studied. The interfacial functionary mechanism of rare earth solution (RES) modification to improve the interfacial bonding properties between BF and the resin matrix was analyzed. The hardness and elastic modulus of the interfacial zone between BF and the resin matrix were measured using nanoindentation. Fourier-transform infrared spectroscopy (FT-IR) was used to analyze the change in the surface functional group of BF in the modification process. The surface chemical composition of BF before and after the modification was characterized by X-ray photoelectron spectroscopy (XPS). The results show that the RES modification significantly increases the hardness and elastic modulus of BF and its interfacial zone with the resin matrix. The hydroxyl concentration on the surface of RES-treated BF decreases, which reduces the hydrophilicity of BF. Rare earth ions react with oxygen in the hydroxyl group at the C2 position in the glucosylic ring of cellulose. The RES-modified BF bonds with the resin matrix to form a rare earth complex, which significantly enhances the interfacial adhesion between BF and the resin matrix.

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“…Due to the difference in lattice parameters and coefficients of linear expansion between the substrate and coating, the structure of the coating/substrate interface is very complex and the interface shows a relatively weaker strength than the bulk materials, which leads to the most frequent occurrence of the peeling of the coating. It is still a considerable challenge for the diamond coating to avoid peeling because the diamond/substrate adhesive strength is not strong enough to undergo the external load [5,6]. Hence, high adhesive strength has become a vitally technical requirement for the coating prior to practical application [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Adhesive Strength, Fatigue Strength and Contact Mechanics on the Drilling Performance of Diamond Coating

Liu

2020

Materials

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Adhesive strength of the coating significantly affects the lifetime of the coating. However, it is still inevitable for the coating, even with strong adhesive strength, to peel off from the substrate after working for a while. In this work, fatigue and wear behaviors were employed to analyze the effect on the mechanics of coating and contribute to a fundamental understanding of peeling of the coating. A small-size Co-cemented tungsten carbide drill bit was selected as the examined substrate to fabricate the diamond coating. Roughening pretreatment with a diamond slurry combined with ultrasonic vibration was performed for the substrate surface to enhance adhesive strength. Meanwhile, a diamond coating without roughening pretreatment was also fabricated for comparison. The lifetime and quality of the coating were evaluated by the drilling test. Although the diamond coating could grow on the substrates with and without roughening pretreatment, the diamond coating with roughening pretreatment possessed a higher lifetime and stronger wear resistance than that without roughening pretreatment. We found that both substrates with and without roughening pretreatment exhibited a coarse surface, whereas the roughening pretreatment could remove the original machined surface of the substrate and thus make the near surface with numerous integrated crystalline grains become the new topmost surface. This increased the contact area and surface energy of the interface, leading to the improvement of adhesive strength. Finally, fatigue strength and contact mechanics were studied to trace the changes in the stress of the diamond coating in the whole process of drilling from a theoretical point of view. We suggest that fatigue strength and contact mechanics may play vital roles on the durability and peeling of the coating.

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Quantitative evaluation of bonding strength for hard coatings by interfacial fatigue strength under cyclic indentation

Cited by 38 publications

References 30 publications

Micro-impact testing of AlTiN and TiAlCrN coatings

Micro-impact testing of AlTiN and TiAlCrN coatings

Study on the Interfacial Functionary Mechanism of Rare-Earth-Solution-Modified Bamboo-Fiber-Reinforced Resin Matrix Composites

Influence of Adhesive Strength, Fatigue Strength and Contact Mechanics on the Drilling Performance of Diamond Coating

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