Interfacial adhesion: improving the mechanical properties of silicon nitride fibre - epoxy polymer composites

Hayward,; Johnston, James H.; Dougherty, Troy; Silva, Kaluachchi De

doi:10.1080/09276440.2018.1499328

Cited by 14 publications

(5 citation statements)

References 31 publications

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“…From these data, shear strength and energy to shear were calculated. The nature of the test does not allow calculation of Young's modulus or elongation to shear [42]. Shear strength is calculated based on Equation (28):…”

Section: Shear Test Resultsmentioning

confidence: 99%

On the Improved Mechanical Properties of Ball-Milled GNPs Reinforced Short Chain Branched-Polyethylene Nanocomposite: Micromechanical Modeling and Fractography Study

et al. 2021

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Short-chain branched-Polyethylene (SCB-PE) is commonly utilized in hot and cold piping systems due to its high-temperature resistance. SCB-PE nanocomposites using graphene nanoplatelets (GNPs) as a reinforcing filler were synthesized in this work. The effect of the filler’s content and the ball-milling process on nanocomposites’ structure, tensile and shear properties was studied. Two series of nanocomposites have been prepared, one with and one without the ball-milling as a premixing step prior to the melt-mixing process. The ball-milling process induced a lower crystallinity degree of the SCB-PE nanocomposites than their solely melt-mixed counterpart. The tensile properties of the ball-milled samples presented a more profound enhancement with increasing filler content. The Ji and modified Halpin-Tsai micromechanical models were best fit to describe the experimental elastic modulus of the solely melt-mixed and the ball-milled nanocomposites, respectively. Fractography studies suggested that the detachment of the filler particles from the polymer matrix is avoided for lower GNPs contents of the ball-milled samples. Shear tests revealed that the shear strength increased and ductility decreased with increasing filler content in any case. The ball-milling process resulted in SCB-PE nanocomposites with superior mechanical properties compared to their solely melt-mixed counterparts.

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Section: Shear Test Resultsmentioning

confidence: 99%

On the Improved Mechanical Properties of Ball-Milled GNPs Reinforced Short Chain Branched-Polyethylene Nanocomposite: Micromechanical Modeling and Fractography Study

et al. 2021

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“…A full analysis of the fibres has been previously reported by the authors [23]. The surface area of the fibres was previously reported as 4.04 m 2 /g [24] while the surface area of Alumix 123 was calculated to be 0.02-0.03 m 2 /g from the manufacturer's specifications. 3 , respectively, which were comparable with other investigations and the manufacturer's specifications [25].…”

Section: Characterizationmentioning

confidence: 99%

“…A calculation was performed on the relative surface area of the Si 3 N 4 reinforcement and Alumix 123. At 0.5% addition, it was determined that this was proportional to a monolayer coverage of the Alumix 123 (SSA addivite × vol.% = SSA matrix ) [24] taking into account that a cohesive monolayer of a solid on another solid is unrealistic. Following this calculation, excess solid reinforcement will lead to agglomeration of ceramic reinforcement and it is possible that this is a reason why 1% Si 3 N 4 composites demonstrated less densification than 0.5%.…”

Section: Elastic Modulusmentioning

confidence: 99%

Properties and characterization of an aluminium–silicon nitride fibre powder metal composite

Dougherty¹,

Xu²

2018

SN Appl. Sci.

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In this article, we fabricated one-dimensional 0.5 vol% silicon nitride (Si 3 N 4) fibre reinforced Alumix123 matrix composites by the powder metallurgy method. Si 3 N 4 is a ceramic material with high strength, stiffness and low coefficient of thermal expansion. The Si 3 N 4 used in the study is comprised of single crystal fibres with sub-micrometre diameter and length < 25 μm. The size of the fibre is smaller than the metal matrix powder allowing it to coat the metal powder before consolidation rather than forming agglomerations that might lead to pores and poor mechanical properties. We investigated the effects of Si 3 N 4 fibre additions on the densification, hardness, elastic modulus and tensile strength. The experimental results found that the Si 3 N 4 fibre effectively enhanced the mechanical properties of the composites at low additions. The microstructural analysis clearly shows the Si 3 N 4 fibres in the sintered grain boundaries. The interface between the fibre and the Alumix123 matrix showed good wetting and bonding with only minimal reaction. The Si 3 N 4 fibre reinforced Alumix123 composites have potential uses in the automobile and aerospace industries due to their improved specific mechanical properties.

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“…13−16 On the other hand, strong adhesion between different phases is needed for the structural integrity of miniscale MEMS. 13,17 Currently, there are no explicit theories that can quantitatively explain the magnitude of the adhesive force between two materials forming interfacial bonding. There are limited findings that explain how bonding occurs at an interface where there is no atomic diffusion taking place (e.g., nonmetallic interfacial systems).…”

Section: Introductionmentioning

confidence: 99%

“…Adhesive force is a type of attractive interaction , between two different substances, which is of importance to many material systems and phenomena, for example, surface adsorption for surface functionalization and catalytic processes, adherence of coatings to the substrate, interfacial binding in multiphase materials, and so forth. − Knowing the adhesion between two substances is essential for material design and selection. For instance, adhesive force should be kept at the minimum to reduce friction and minimize adhesive wear of components in dynamics contact in various devices. − Adhesive force may cause vibration and seizure of moving parts, leading to complete breakdown of the entire system. , The adhesive force is more critical in MEMS or BioMEMS applications due to their small sizes (sometimes in the order of nanometers), which may cause malfunction of relevant devices. − On the other hand, strong adhesion between different phases is needed for the structural integrity of miniscale MEMS. , …”

Section: Introductionmentioning

confidence: 99%

Dependence of Interfacial Adhesion between Substances on Their Electron Work Functions

Setiawan

2022

Langmuir

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In this article, we demonstrate the dependence of the adhesive force (F Ad) between two different substances on their electron work functions (EWF or φ) without atomic diffusion involved. The adhesive forces between Si3N4 and a number of metals were measured using an atomic force microscope. It is shown that the larger the difference in φ between the two substances in contact, the larger the F Ad. F Ad is also influenced by the electron freedom and density (related to the charge availability). An analytical model is proposed to elucidate the underlying mechanism and quantify the adhesive interaction.

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Interfacial adhesion: improving the mechanical properties of silicon nitride fibre - epoxy polymer composites

Cited by 14 publications

References 31 publications

On the Improved Mechanical Properties of Ball-Milled GNPs Reinforced Short Chain Branched-Polyethylene Nanocomposite: Micromechanical Modeling and Fractography Study

On the Improved Mechanical Properties of Ball-Milled GNPs Reinforced Short Chain Branched-Polyethylene Nanocomposite: Micromechanical Modeling and Fractography Study

Properties and characterization of an aluminium–silicon nitride fibre powder metal composite

Dependence of Interfacial Adhesion between Substances on Their Electron Work Functions

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