Carbon-based nano lattice hybrid structures: Mechanical and thermal properties

Değirmenci, Ünal; Kırca, Mesut

doi:10.1016/j.physe.2022.115392

Cited by 8 publications

(3 citation statements)

References 105 publications

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“…In this study, hybrid potential was used for the interaction between atoms. In this context, the Adaptive Molecular Reactive Empirical Boundary Series (AIREBO) potential is used for the carbon atom interaction between graphene and CNT [25,26]. The AIREBO potential is an important potential that can represent a dynamic system as it can accurately predict the formation of new bonds.…”

Section: Simulation Detailsmentioning

confidence: 99%

Investigation of mechanical properties of graphene-CNT reinforced nickel metal matrix nanocomposite structure

Değirmenci

2024

Türk Doğa Ve Fen Dergisi

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Nickel is a metal widely used in many industrial applications, but despite its superior properties, it also has some shortcomings. Carbon-based structures can be important reinforcement elements in improving the properties of metals. By providing a balance between the high corrosion resistance, high electrical conductivity and good magnetic properties of the nickel material and the lightness and high strength of carbon-based structures, a material with advanced properties can be obtained. Therefore, in this study, a new Nickel-Carbon nanostructure supported by a covalently bonded graphene-carbon nanotube (CNT) skeleton structure is presented. Additionally, three material designs with different geometric dimensions (Ni-G-CNT(5,5), Ni-G-CNT(10,10) and Ni-G-CNT(15,15)) were designed to determine the mechanical properties and properties of the structures in all directions. is to investigate the underlying deformation mechanisms. According to the results, it was observed that G-CNT structures increased the tensile and compressive behavior of the Ni structure in the CNT direction. For tensile loading in the CNT direction, as the CNT diameter decreases, the elastic modulus of the hybrid structures increases, while the maximum stress values are independent of the CNT diameter. As the CNT diameter increases, the ductility of the structures increases. In terms of compressive strength, it has been observed that in the linear region, as the CNT diameter increases, the strength generally increases and in the condensation region, it exhibits better compressive strength. With this study, an anisotropic nanostructure that is lighter and can exhibit higher tensile strength compared to the Ni structure is presented.

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Section: Simulation Detailsmentioning

confidence: 99%

Investigation of mechanical properties of graphene-CNT reinforced nickel metal matrix nanocomposite structure

Değirmenci

2024

Türk Doğa Ve Fen Dergisi

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“…Örneğin, Değirmenci vd. [25] [11], grafen-alüminyum kompozitlerin çekme dayanımını incelemiş ve çekme dayanımının, saf alüminyuma göre %62 daha fazla olduğunu belirlemiştir. Shin ve ark.…”

Section: Introductionunclassified

Pt-Al/Grafen-KNT Nanoyapılarının Mekanik Performansı; Bir Moleküler Dinamik Simülasyonu

Değirmenci

2023

DÜMF MD

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Metallerle karbon temelli yapıların bir araya getirilmesi ile oluşturulan hibrit nanokompozitler, malzeme bilimi ve mühendisliğinde heyecan verici bir araştırma alanı oluşturmuştur. Bu kompozitler, metallerin dayanıklılığı ile karbon bazlı yapıların hafiflik ve yüksek mukavemeti arasında bir denge sağlayarak benzersiz mekanik özelliklere sahip olurlar. Bu nedenle yeni Metal –Karbon nanoyapılarına eğilim halen devam etmektedir. Bu çalışmada, Platinyum ve alüminyum plakalar arasına yerleştirilen kovalent bağlı grafen- KNT yapılarından oluşan yeni bir Metal-Karbon nanoyapısı sunulmaktadır. Ayrıca, yapının mekanik özelliklerini ve altta yatan deformasyon mekanizmalarını araştırmak için, farklı çaplara sahip KNT (örn. KNT(6x6), KNT(8x8), KNT(10x10), KNT(12x12)) içeren numunelerin çekme ve basınç deneyleri gerçekleştirilir. Sonuçlara göre, G-KNT yapılarının Pt-Al yapısının çekme davranışını her iki doğrultuda (KNT ve Grafen) artırdığı görülmüştür. KNT doğrultusunda çekme yüklemeleri için KNT çapı azaldıkça hibrit yapıların elastik modülü ve maksimum gerilme değerleri artarken grafen doğrultusunda ise maksimum gerilme değerleri ve süneklikleri artmaktadır. Basma dayanımı açısından ise lineer bölgede genel olarak KNT çapı arttıkça dayanımın arttığı yoğunlaşma bölgesinde ise daha küçük çaplı KNT içeren yapıların daha iyi basma dayanımı sergilediği görülmüştür. Bu çalışma ile Pt-Al yapısına kıyasla daha hafif ve daha yüksek çekme dayanımına sahip bir nanoyapı sunulmuştur.

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“…Atomistic simulations have been raised as one of the most relevant tools in searching for novel carbon materials [32]. There has been a large effort to model graphene foams [33], hybrid graphene-fullerene foams [34], and graphene-CNT foams [35]. Mechanical properties of random graphene foams of different densities have been studied [36,37].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Amorphous Carbon with Exceptional Ultra-High Strength

et al. 2023

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Nanoporous materials show a promising combination of mechanical properties in terms of their relative density; while there are numerous studies based on metallic nanoporous materials, here we focus on amorphous carbon with a bicontinuous nanoporous structure as an alternative to control the mechanical properties for the function of filament composition.Using atomistic simulations, we study the mechanical response of nanoporous amorphous carbon with 50% porosity, with sp3 content ranging from 10% to 50%. Our results show an unusually high strength between 10 and 20 GPa as a function of the %sp3 content. We present an analytical analysis derived from the Gibson–Ashby model for porous solids, and from the He and Thorpe theory for covalent solids to describe Young’s modulus and yield strength scaling laws extremely well, revealing also that the high strength is mainly due to the presence of sp3 bonding. Alternatively, we also find two distinct fracture modes: for low %sp3 samples, we observe a ductile-type behavior, while high %sp3 leads to brittle-type behavior due to high high shear strain clusters driving the carbon bond breaking that finally promotes the filament fracture. All in all, nanoporous amorphous carbon with bicontinuous structure is presented as a lightweight material with a tunable elasto-plastic response in terms of porosity and sp3 bonding, resulting in a material with a broad range of possible combinations of mechanical properties.

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Carbon-based nano lattice hybrid structures: Mechanical and thermal properties

Cited by 8 publications

References 105 publications

Investigation of mechanical properties of graphene-CNT reinforced nickel metal matrix nanocomposite structure

Investigation of mechanical properties of graphene-CNT reinforced nickel metal matrix nanocomposite structure

Pt-Al/Grafen-KNT Nanoyapılarının Mekanik Performansı; Bir Moleküler Dinamik Simülasyonu

Nanoporous Amorphous Carbon with Exceptional Ultra-High Strength

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