Adhesive/Cohesive Properties of Thermally Sprayed Functionally Graded Coatings for Polymer Matrix Composites

Ivosevic, M.; Knight, Richard; Kalidindi, Surya R.; Palmese, Giuseppe R.; Sutter, James K.

doi:10.1361/10599630522765

Cited by 61 publications

(21 citation statements)

References 6 publications

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“…Thick coatings can be obtained from electrochemical and spray technologies, which guarantee high load support but lack in adhesion during overloading due to high stiffness and low plastic deformability for the following substrate deflection [1][2][3]. Mechanically, this phenomenon is described based on bending stresses [4]: During mechanical loading, brittle ceramic coatings crack under the bending stresses generated by elastic or plastic deformation of the subjacent soft substrate.…”

Section: Introductionmentioning

confidence: 99%

Tribology and Micromechanics of Chromium Nitride Based Multilayer Coatings on Soft and Hard Substrates

et al. 2014

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Abstract:The tribological protection of carbon fiber reinforced epoxy composites (CFC) is essential for broadening their use from structural to functional applications, e.g., to linear bearings in mechanical engineering. However, their wear resistance in sliding and rolling contacts is low. This work focusses on the possibility of improving their tribological properties by the application of thin hard multi-layered coatings. Chromium nitride (CrN) single layer and chromium-CrN multilayer coatings of ~4 µm thickness, partly finished with a 1 µm diamond-like carbon (DLC) top layer, were deposited by magnetron sputtering at low temperatures on soft CFC and for comparison of the mechanical behavior on comparatively hard austenitic steel substrates. Structural investigations showed especially that the multilayer coatings possess a very fine grained, columnar microstructure and a very low density of intercolumnar micro-cracks, while the single layer coatings possess a coarse structure. The indentation testing and the analysis of the deformed and fractured cross-sections revealed a tougher behavior with improved plastic deformability of the multilayers in comparison to CrN single layers. However, in wear testing only coatings with DLC top layers significantly improved the tribological material properties of CFC. This is due to the reduced shear forces in sliding on low-friction DLC coatings on the soft OPEN ACCESSCoatings 2014, 4 122 epoxy-based CFC, decreasing the total dynamic stresses during sliding under high loads.

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Section: Introductionmentioning

confidence: 99%

Tribology and Micromechanics of Chromium Nitride Based Multilayer Coatings on Soft and Hard Substrates

et al. 2014

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“…It is challenging to quantify the contribution of each mechanism to the total bond strength of the coating to the substrate; therefore, the measurement of the bond strength is accomplished by considering the overall impact of all the mechanisms. The estimation of the coating bond strength allows for evaluation of the integrity of the coating-substrate interface, usually referred to as adhesion, and the strength of the coating within itself, referred to as cohesion (Ref 46,100).…”

Section: Hardness Testmentioning

confidence: 99%

“…The stud-pull test is a commonly used method in which a loading element (stud) is bonded to the flat surface of the coating, and placed in tension with a load applied at a controlled rate while measuring the displacement of the stud until delamination of the coating occurs ( Ref 25,99,100,102). For instance, Ganesan et al (Ref 25) evaluated the effect of different substrate preparation treatments on the bond strength of plasma-sprayed Cu coatings, using stull-pull tests.…”

Section: Hardness Testmentioning

confidence: 99%

A Review of Thermal Spray Metallization of Polymer-Based Structures

et al. 2016

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A literature review on the thermal spray deposition of metals onto polymer-based structures is presented. The deposition of metals onto polymer-based structures has been developed to enhance the thermal and electrical properties of the resulting metal-polymer material system. First, the description of the thermal spray metallization processes and technologies for polymer-based materials are outlined. Then, polymer surface preparation methods and the deposition of metal bond-coats are explored. Moreover, the thermal spray process parameters that affect the properties of metal deposits on polymers are described, followed by studies on the temperature distribution within the polymer substrate during the thermal spray process. The objective of this review is devoted to testing and potential applications of thermal-sprayed metal coatings deposited onto polymer-based substrates. This review aims to summarize the state-of-the-art contributions to research on the thermal spray metallization of polymer-based materials, which has gained recent attention for potential and novel applications.

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“…In recent years, several surface modification technologies for the fabrication of different functional coatings on the PMCs have been developed, [15][16][17][18][19][20][21][22][23] including sol-gel process, high velocity oxy-fuel spray (HVOF), air plasma spray (APS), arc spray, metal-organic chemical vapor deposition (MOCVD), magnetron sputtering, plasma-enhanced chemical vapor deposition (PECVD), cold gas dynamic spray (CGDS) and pulsed gas dynamic spray (PGDS).…”

Section: Introductionmentioning

confidence: 99%

Oxidation behavior of plasma-sprayed stabilized zirconia/Al coated polymer matrix composites

2015

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The stabilized zirconia/Al coatings were fabricated on the polymer substrate via plasma spraying. Thermal shock resistance and thermal oxidation resistance of the specimens at different temperatures were evaluated. Due to the increased interface stress and substrate oxidation, the coating lifetime reduced with increasing the temperature. The Al-YSZ coatings provided good oxidation resistance, the weight loss and weight loss rate of the specimens decreased greatly and the service lifetimes were prolonged. After oxidation at 673K or 723K, the coatings exhibited a clean interface bonding without visible defects, while the weight loss was primarily attributed to oxygen penetration and heat transfer. 15 decrease as compared with those of substrate, and the oxidation time for 5.0 wt.% weight loss is prolonged during oxidation in air at 673K.Similarly, no apparent defects or other destructions derived from oxidation can be discovered from the specimens coated with Al-YSZ coatings by comparing the specimens before and after thermal oxidation test at 723K for 13 h (Figure 6c and d). Figure 8 displays the curves of weight loss and weight loss rate of the specimens uncoated and coated with Al-YSZ coating during oxidation in air at 723K. As noted from Figure 8a and b, the weight loss and weight loss per unit area of the specimen coated with Al-YSZ coating are also greatly decreased in comparison with that of substrate. From these curves, after oxidation in air at 723K for 13 h, the weight loss and weight loss per unit area of substrate are 20.76 wt.% and 38.89 mg cm -2 , while that of the specimen coated with Al-YSZ coating are reduced to 4.73 wt.% and 13.17 mg cm -2 respectively. It is obvious that the weight loss and weight loss per unit area of the specimen are sharply lessened during oxidation at 723K, which is resulted from the protection of Al-YSZ coating. As shown in Figure 8c, however, the weight loss rates of specimens represent different trends during oxidation at 723K as compared with that of specimen oxidized at 673K. From Figure 8c, the weight loss rate of substrate displays an increase tendency along with the oxidation time extending. Nevertheless, owing to the protection of Al-YSZ coating, the weight loss rate of specimen is decreased after oxidation for the same time and it also slowly increases with the raise in oxidation time. After oxidation at 723K for 13 h, the weight loss rates of the specimens uncoated and coated with Al-YSZ coating are calculated to be 2.99 mg cm -2 h -1 and 1.01 mg cm -2 h -1 , respectively.Correspondingly, by comparing with oxidation behaviors of specimens during oxidation at

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Adhesive/Cohesive Properties of Thermally Sprayed Functionally Graded Coatings for Polymer Matrix Composites

Cited by 61 publications

References 6 publications

Tribology and Micromechanics of Chromium Nitride Based Multilayer Coatings on Soft and Hard Substrates

Tribology and Micromechanics of Chromium Nitride Based Multilayer Coatings on Soft and Hard Substrates

A Review of Thermal Spray Metallization of Polymer-Based Structures

Oxidation behavior of plasma-sprayed stabilized zirconia/Al coated polymer matrix composites

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