Enhanced mechanical properties of boron nitride nanosheet/copper nanocomposites via a molecular-level mixing process

Yoo, Sung Chan; Kim, Joonhui; Lee, Wonki; Hwang, Jun Yeon; Ryu, Ho Jin; Hong, Soon Hyung

doi:10.1016/j.compositesb.2020.108088

Cited by 29 publications

(4 citation statements)

References 81 publications

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“…[ 52 ] When the filler content of composites surpasses 5 wt%, the elongation at break is drastically decreased, which is related to the restriction of PVA chain mobility caused by fillers. [ 65 ] The BNNSs@Al 2 O 3 /PVA composite has better tensile strength and elongation at break than the BNNSs/Al 2 O 3 /PVA composite at the same filler content mainly due to better dispersion and arrangement of fillers in the PVA matrix, highlighting that hetero‐structured fillers can better maintain composite mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Zhang

2023

Polymer Composites

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With the rapid growth of highly integrated electrical devices, the urgent demand for polymer composites with high thermal conductivity (TC) is increasing for effective thermal management. In this work, boron nitride nanosheets (BNNSs) were chemically grafted with aluminum oxide (Al2O3) to develop hetero‐structured filler (BNNSs@Al2O3). The BNNSs@Al2O3 fillers were uniformly dispersed in the poly(vinyl alcohol) (PVA) by solvent mixing, verified by SEM, and the oriented BNNSs@Al2O3/PVA composites were produced by the doctor blade method. The results exhibited that the synergistic effect of BNNSs and Al2O3 was achieved, and the thermal conductivities of BNNSs@Al2O3/PVA composites were improved. When keeping the filler content at 30 wt%, the in‐plane and out‐of‐plane TC of BNNSs@Al2O3/PVA composite reached 5.641 and 0.651 W/(m·K), respectively. The BNNSs@Al2O3 filler may improve the performance of composite heat dissipation by reducing the interfacial resistance between fillers and making it easier to establish directed heat‐transfer pathways. This composite demonstrates promising application in the field of electronic packaging.

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Section: Resultsmentioning

confidence: 99%

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Zhang

2023

Polymer Composites

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“…Nanoceramic particles of boron nitride are an effective reinforcing material for aluminium alloys due to their extreme hardness, wear resistance, and elevated-temperature stability 1 – 3 , which is of great significance for the modification and application of aluminium alloys. Previous studies had mainly analyzed the modification effect of ceramic particles of boron nitride on composites through experiments, and the results mainly focus on the preparation method, mechanical properties, and the content and dispersion of nanoparticles 4 – 7 . For example, L. Tharanikumar et al 8 – 11 investigated the effect of the addition of boron nitride particles with different volume fractions on the mechanical properties of aluminium alloys.…”

Section: Introductionmentioning

confidence: 99%

Influence of nano-BN inclusion and mechanism involved on aluminium-copper alloy

Zhang,

Zeng,

Wang

et al. 2024

Sci Rep

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Taking advantage of the high specific surface area of the nanoparticles, boron nitride (BN) nanoparticles were incorporated into the semi-solidified aluminium-copper alloy Al–5Cu–Mn (ZL201) system during the casting process, and its properties and enhancement mechanism were studied. The results shown that the BN in the new composite material is more uniformly distributed in the second phase (Al2Cu), which can promote grain refinement and enhance the bonding with the aluminium-based interface, and the formation of stable phases such as AlB2, AlN, CuN, etc. makes the tensile strength and hardness of the material to be significantly improved (8.5%, 10.2%, respectively). The mechanism of the action of BN in Al2Cu was analyzed by establishing an atomic model and after calculation: BN can undergo strong adsorption on the surface of Al2Cu (0 0 1), and the adsorption energy is lower at the bridge sites on the two cut-off surfaces, which makes the binding of BN to the aluminum base more stable. The charge transfer between B, N and each atom of the matrix can promote the formation of strong covalent bonds Al–N, Cu–N and Al–B bonds, which can increase the dislocation density and hinder the grain boundary slip within the alloy.

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“…Additionally, BNNSs are more oxidation resistant than graphene [ 16 ]. This may endow BNNSs/Cu with some unique tribological properties, such as a high working temperature [ 17 , 18 , 19 ]. To the best of our knowledge, the tribological properties of BNNSs/Cu has seldom been investigated.…”

Section: Introductionmentioning

confidence: 99%

The Wear Performance of Cu-Based Composites Reinforced with Boron Nitride Nanosheets

Zhu

2022

Materials

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Copper matrix composites (CMCs) were prepared by blending Cu particles with boron nitride nanosheets (BNNSs) and then by consolidating the blended particles using spark plasma sintering (SPS). The relative density of the compacts was over 99%, and an intact interface was formed between Cu and the BNNSs. Within the range of the BNNS content studied, its introduction improved microhardness and wear resistance. With the introduction of 0.2 vol% BNNSs, the friction coefficient reduced from 0.15 to merely 0.07, and the wear resistance improved by over 100%. This makes the CMCs reinforced with BNNSs promising materials in applications such as bearings.

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Enhanced mechanical properties of boron nitride nanosheet/copper nanocomposites via a molecular-level mixing process

Cited by 29 publications

References 81 publications

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Influence of nano-BN inclusion and mechanism involved on aluminium-copper alloy

The Wear Performance of Cu-Based Composites Reinforced with Boron Nitride Nanosheets

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