Adhesion of metallic glass and epoxy in composite-metal bonding

Hamill, Lee; Nutt, Steven

doi:10.1016/j.compositesb.2017.09.044

Cited by 28 publications

(13 citation statements)

References 38 publications

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“…It can be stated that the presence of the adhesive film was detrimental for the material strength, whereas the decrease of metal sheets number was positive. As concerns the former conclusion, it seemed to be in contradiction with past literature; in fact, several researchers [8,24,25] discovered an improvement due to the presence of the adhesive, but it must be underlined that the enhancement was found only for lap shear and interlaminar shear tests, while the in-plane mechanical properties, as the tensile strength, showed a similar behaviour. Only in the work of Li et al [25] the flexural behaviour was considered, but the same authors acknowledged their results to be highly depending on specimen and test geometry.…”

Section: Resultscontrasting

confidence: 56%

Experimental analysis of aluminium/carbon epoxy hybrid laminates under flexural load

Bellini

Cocco²,

Iacoviello³

et al. 2019

Frattura Ed Integrità Strutturale

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Industry needs new materials that present very high structural characteristic, such as high strength, low weight and high damage tolerance. To obtain these characteristics a new class of materials has been introduced: Fibre Metal Laminate (FML); they consist in metal sheets alternated to composite material layers: in such manner, the good characteristics of each constituent material confer the utmost properties to the FMLs. However, the mechanical properties depend, among other factors, on the thickness and the numerousness of the layers constituting the FML, as well as the interface between metal and composite. Therefore, in this paper, the influence of the abovementioned factors on the material answer to flexural load was investigated. In particular, different kinds of laminates were produced varying the layers adhesion and the layers thickness, but maintaining unaltered the metal/composite volume ratio and the total laminate thickness. Then their structural behaviour was investigated through three-point bending test, and it was found that the flexural behaviour was affected by both the investigated factors; in fact, the maximum flexural load diminished incrementing the number of layers and inserting an adhesive layer at the metal/composite interface.

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Section: Resultscontrasting

confidence: 56%

Experimental analysis of aluminium/carbon epoxy hybrid laminates under flexural load

Bellini

Cocco²,

Iacoviello³

et al. 2019

Frattura Ed Integrità Strutturale

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“…Each FML employed the same general stacking sequence; a four‐ply, [0/90] s composite layer was placed between each pair of metal layers. Previous research by the authors investigated adhesion methods for BMG‐based and Al‐based FMLs and determined that the strongest bond was achieved when the metal was initially degreased and an adhesive layer (3M Scotch‐Weld Structural Adhesive Film AF 163–2) was included at each composite‐metal interface . In this study, metal strips were cleaned with acetone prior to stacking, and the same adhesive layer was included.…”

Section: Methodsmentioning

confidence: 99%

Galvanic Corrosion and Mechanical Behavior of Fiber Metal Laminates of Metallic Glass and Carbon Fiber Composites

2017

Self Cite

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The possibility of galvanic corrosion typically prohibits the pairing of carbon fiber and aluminum in a fiber metal laminate (FML). In this study, the authors describe a new type of FML comprised of alternating layers of bulk metallic glass (BMG) and carbon fiber reinforced polymer (CFRP) composite. The authors compare the galvanic coupling and mechanical behavior of an Al-based FML and a BMG-CFRP FML. Results show that when paired with CFRPs, BMG exhibits far less galvanic corrosion than aluminum paired with CFRP. In fact, the corrosion between BMG and CFRP is similar in magnitude to the corrosion between aluminum and glass fiber, the two constituent materials of GLARE, the most widely used FML. While interlaminar shear strength and flexural strength are similar for both FML types, the tensile strength and modulus of BMG-based FMLs are greater than those of Albased FMLs.

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“…It can be observed in Figure 3D1,F1 that the roughness of the silane treated samples reduced compared to that of mechanical polishing and alkali solution immersion (MPAL) and P2, indicating that a silane film was formed on the Al surface. Hamill and Nutt [28] used XPS to confirm the presence of a silane film on the Al2024 surface after silane treatment. The roughness data, Rq and Ra, of various surface-treated Al sheets obtained using AFM is shown in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…This is because P2 etching presented a high porosity surface for the Al alloy [15]. Hamill and Nutt [28] found that the silane treatment did not substantially increase wettability or roughness of the Al alloy surface. However, it can improve the bonding ability between metal and epoxy through forming a covalent bond.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Nano-Mechanical Behavior on Flax Fiber Metal Laminates Using an Atomic Force Microscope

Pan

et al. 2019

Materials

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The application of plant fiber-reinforced composite (PFRC) is limited due to its relatively low mechanical properties. The hybridization of a thin metal layer with plant fiber into a fiber metal laminate can largely improve the mechanical performance and the brittle fracture behavior of PFRC. However, both plant fiber and metal have difficulty bonding with the polymer matrix. In this paper, several different surface treatment methods were applied on Al alloy sheets, and the influence of surface treatments on the surface morphology and nano-mechanical properties of Al alloy were studied using an atomic force microscope (AFM). After the preparation of flax fiber–metal laminates (FFMLs) with a vacuum-assisted resin transfer molding (VARTM) technique, the nanomechanical properties of different modified FFMLs were also evaluated with an AFM. It was found that the surface treatment combination of the sulfuric acid-ferric sulfate-based treatment (P2 etching) and the silane coupling agent provided the best adhesion force and modulus for Al alloy sheets at nanoscale resolution, which contributed to the surface energy increasing and strong covalent bonds between metal and polymer matrix. The resulting manufactured FFMLs also exhibited the highest nano-mechanical properties due to the great improvement of interfacial properties between metal and matrix, which was caused by mechanical interlocking mechanism and covalent bonds between metal/fiber and resin. Macromechanical performance, including tensile and flexural properties of these modified FFMLs, was also investigated. Comparison of the modulus at the nanoscale and macroscale showed reasonable agreement, and it revealed the tough interlaminar mechanisms of these types of FFMLs.

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Adhesion of metallic glass and epoxy in composite-metal bonding

Cited by 28 publications

References 38 publications

Experimental analysis of aluminium/carbon epoxy hybrid laminates under flexural load

Experimental analysis of aluminium/carbon epoxy hybrid laminates under flexural load

Galvanic Corrosion and Mechanical Behavior of Fiber Metal Laminates of Metallic Glass and Carbon Fiber Composites

Evaluation of Nano-Mechanical Behavior on Flax Fiber Metal Laminates Using an Atomic Force Microscope

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