Observations on interphase characterisation in polymer composites by nano-scale indentation using AFM and FEA

Young, T J; Crocker, L E; Broughton, W R; Ogin, S.L.; Smith, PA

doi:10.1016/j.compositesa.2013.03.014

Cited by 26 publications

(11 citation statements)

References 11 publications

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“…The nanoindentation technique is an efficient method to reveal the mechanical properties of many materials in terms of stiffness, especially for fibrous materials where the contact area is very small. Some nanoindentation work have been conducted on glass fibers using Atomic Force Microscopy (AFM) [14,15], tribo-indenter [16], AFM adapted with commercial nanoindenter [17] or instrumented indentation (IIT) [14]. All these work reveal a homogeneous behavior of glass fibers with an elastic Young modulus between 60 GPa and 90 GPa depending on the type of the glass fibers used in each of these studies which correspond to the standard elastic modulus of glass fibers obtained by tensile tests [1,4].…”

Section: Introductionmentioning

confidence: 99%

Scale effect on tribo-mechanical behavior of vegetal fibers in reinforced bio-composite materials

Chegdani

Mansori

Mezghani

et al. 2017

Composites Science and Technology

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The nature of friction of vegetal fiber and polymeric matrix in bio-composite materials is very important for many industrial applications. In order to design natural fiber composites for structural applications, the scientific understanding of tribo-mechanical phenomena inside the heterogeneous structure of natural fibers and also the overall heterogeneous structure of the bio-composite is required. This implies a special focus on the fundamental aspects of vegetal fiber friction at the macro-, meso-, and microscale. This research paper investigates the multiscale mechanical and friction properties of natural fibers. The mechanical properties of flax fibers, glass fibers (as a reference) and polypropylene matrix has been evaluated at microscale and mesoscale by Atomic Force Microscopy (AFM) and Nanoindenter XP (MTS Nano Instruments), respectively, using nanoindentation technique. At the macroscale, the mechanical behavior has been considered for the global composite structure. The micro-friction response of each composite component has been measured by instrumenting AFM for scratch test technique. The results show the scale dependence of mechanical behavior for flax fibers, unlike glass fibers and polypropylene matrix where their mechanical performances are independent of the analysis scale. Tribological results in terms of dynamic friction coefficient show that flax fibers induce more friction than glass fibers, while polypropylene matrix generates the highest friction. This is sign that vegetal fiber friction is scale dependent property as shown when referring to the contact mechanics theory. The arisen results are very important for many technical applications in PMCs surface engineering based on plant fibers.

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Section: Introductionmentioning

confidence: 99%

Scale effect on tribo-mechanical behavior of vegetal fibers in reinforced bio-composite materials

Chegdani

Mansori

Mezghani

et al. 2017

Composites Science and Technology

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“…With the development of atomic force microscopy, several researchers have applied the atomic force microscope (AFM) technique to access mechanical properties of glass fiber reinforced composite laminates at submicron or nanoscale [17,18,19]. These works revealed a homogeneous behavior of glass fibers, and the modulus obtained through these methods is consistent with the modulus obtained by tensile tests.…”

Section: Introductionmentioning

confidence: 81%

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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“…A silicon probe (SI-DF20, Hitachi High-Tech, Japan) with a nominal tip radius of 10 nm and a spring constant of 14 N/m was used for AFM measurements. Force-displacement (FD) curves were obtained by nanoindentation using AFM and these curves yield information on the nano-physical properties of the tested surfaces [41][42][43][44][45][46].…”

Section: Afm Analysismentioning

confidence: 99%

Synergistic Enhancement of the Lubrication Performance of Zinc Dialkyldithiophosphate by Coexistence with Ionic Liquid

et al. 2021

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Ionic liquids (ILs) are being considered as novel lubricant additives to improve the friction and anti-wear characteristics of sliding surfaces. Because ILs consist of only cations and anions, their physical and chemical properties can be easily tailored by modifying their combination. These features enable to design of specific ILs for a given tribological system. However, there are few reports on the effect of ILs used as lubricant additives on the friction and anti-wear characteristics of sliding surfaces. Moreover, it is necessary to investigate the synergism between ILs and other lubricant additives to achieve high practical efficiency. Therefore, in this study, two ILs with different cations but similar anions were used in combination with an anti-wear additive, zinc dialkyldithiophosphate (ZDDP), and the resultant wear and friction characteristics of the worn surfaces were analyzed. We found that the tribological performance under steel/ steel sliding conditions was dependent on the chemical composition of the ILs. In addition, mixed ZDDP and IL solutions exhibited lower friction and wear when compared to ZDDP alone. It is considered that the excellent lubrication and frictional performance observed with the mixed lubricant solutions is due to the formation of tribofilms comprising of ZDDP and IL on the sliding surface.

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Observations on interphase characterisation in polymer composites by nano-scale indentation using AFM and FEA

Cited by 26 publications

References 11 publications

Scale effect on tribo-mechanical behavior of vegetal fibers in reinforced bio-composite materials

Scale effect on tribo-mechanical behavior of vegetal fibers in reinforced bio-composite materials

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

Synergistic Enhancement of the Lubrication Performance of Zinc Dialkyldithiophosphate by Coexistence with Ionic Liquid

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