Tribological and neutron radiation properties of boron nitride nanotubes reinforced titanium composites under lunar environment

Bacca, Nicole; Zhang, Cheng; Paul, Tanaji; Sukumaran, Abhijith Kunneparambil; John, Denny; Rengifo, Sara; Park, Cheol; Chu, Sang-Hyon; Mazurkivich, Matthew; Scott, William; Agarwal, Arvind

doi:10.1557/s43578-022-00708-w

Cited by 23 publications

(8 citation statements)

References 32 publications

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“…Recently, our group reported improved yield strength (YS) of a Ti alloy reinforced with 1 wt% 1D‐boron nitride nanotube (BNNT) using the PIP technique. [ 15 ] However, there are no reported investigations concerning validating the PIP technique for measuring the tensile properties of MMCs with high concentrations of particulate reinforcements.…”

Section: Introductionmentioning

confidence: 99%

“…Profilometry-based indentation plastometry (PIP) is a novel high-throughput alternative compared to uniaxial testing for evaluating the material true tensile characteristics. [12,[15][16][17][18][19][20][21][22][23] It involves iterative finite element simulation (FEM) of the indentation process, which consist of systematically varying the values of parameters in Voce plasticity law until an optimum agreement is obtained between modeled indent profile and the experimentally measured residual indent profile. [12,17] In this method, both load-displacement response and profile of the residual indent are used to infer the plasticity characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Profilometry‐Based Indentation Plastometry for Evaluating Bulk Tensile Properties of Aluminum‐Silicon Carbide Composites

et al. 2023

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The need for large samples with specific geometries and the destructive nature of conventional tensile testing pose a challenge in the rapid mechanical characterization of metal matrix composites (MMCs). Herein, the efficacy of a high‐throughput profilometry‐based indentation plastometry (PIP) technique for evaluating bulk tensile properties of SiC‐reinforced aluminum MMC with minimum sample volume and preparation is investigated. Plastic properties, namely yield strength (YS), ultimate tensile strength (UTS), and elongation up to necking (εn) in aluminum composites reinforced with 0, 17.5, and 25 vol% of SiC from PIP, are compared with uniaxial tensile tests. While PIP estimations of YS for all composites and UTS for Al‐17.5 vol% SiC are accurate within 3–6%, those of UTS in 25 vol% and εn in all composites show significant deviation from tensile test data. These deviations are attributed to the PIP overestimation of strength due to local SiC crowding beneath the indenter and the limitation of the Voce plasticity‐based FEM simulation in capturing brittle behavior of high vol% reinforcement. Herein, the high‐throughput PIP technique that can be reliably extended to MMCs with low volume (≈17.5%) of SiC reinforcements is established, thus harboring potential for advancement in the nondestructive testing of MMCs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Profilometry‐Based Indentation Plastometry for Evaluating Bulk Tensile Properties of Aluminum‐Silicon Carbide Composites

et al. 2023

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“…The reinforcement of BNNTs in the matrix can also improve the radiation shielding properties, as demonstrated in the Ti‐BNNT composite in our previous work. [ 6 ] The mass absorption coefficient reportedly increased from 0.097 to 0.145 cm 2 g −1 with the addition of BNNTs in the Ti matrix at a sintering temperature of 750 °C. A similar radiation shielding ability is thus expected in the Al‐BNNT composite, which will be investigated in our future study.…”

Section: Resultsmentioning

confidence: 99%

“…Boron nitride nanotube (BNNT), a structural analog of carbon nanotube (CNT), is an emerging reinforcement due to its remarkable mechanical properties, such as high strength (≈61 GPa) and stiffness (≈1 TPa), [ 2,3 ] long aspect ratios (≈30 000–70 000), chemical inertness, and radiation shielding ability. [ 4–6 ] Owing to the higher resistance of BNNTs to oxidation at elevated temperatures of more than 900 °C, BNNTs have great potential for high‐temperature applications in the aerospace industry. [ 7–9 ]…”

Section: Introductionmentioning

confidence: 99%

Exploring the Potential of Wire Fed Direct Energy Deposition of Aluminum–Boron Nitride Nanotube Composite: Microstructural Evolution and Mechanical Properties

Mohammed,

Aleman,

John

et al. 2023

Adv Eng Mater

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Recent advancements have shown great promise in utilizing wire‐fed direct energy deposition (DED) for building aluminum alloy structures. However, utilizing the wire‐fed DED approach for fabricating metal matrix composite structures remains a significant challenge. This study used a wire‐based AM process to successfully produce a one‐dimensional boron nitride nanotube (BNNT)‐reinforced aluminum composite with high strength. An Al‐BNNT electrode was developed in‐house. The microstructural changes that occurred during layer‐by‐layer deposition were investigated. The grain morphology changed from equiaxed grains in the bottom layer to columnar grains in the top layer. BNNTs act as nuclei to promote the formation of equiaxed grains and interfacial compounds (AlN and AlB2) during solidification. This resulted in improved strength, with Al‐BNNT composite exhibiting a tensile strength of 47 MPa, 2.3 times higher than its pure Al. Higher strength was attributed to the retention and uniform distribution of BNNT reinforcement in the melt pool, leading to effective load transfer. This study demonstrates the potential of additive manufacturing for producing high‐performance metal matrix composites with novel 1D reinforcements and improved multifunctional properties.This article is protected by copyright. All rights reserved.

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“…One-dimensional nanomaterials, such as carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs), have many potential applications because of their unique properties. − In particular, BNNTs have an analogous structure to CNTs with a hexagonal honeycomb lattice that forms tubular structures but contains alternating B and N atoms, which give rise to their unique properties. , For example, because of the relatively strong electronegativity of N compared with that of B, the electrons within these p orbital bonds are localized toward the N nuclei instead of being delocalized in CNTs. , Therefore, BNNTs exhibit good electrical insulation properties (i.e., large band gaps of approximately 5.5 eV). − In addition, BNNTs exhibit excellent mechanical and thermal properties owing to their sp 2 hybridized bonds. − Therefore, they are highly resistant to oxidation, corrosion, and degradation even at high temperatures and in harsh chemical environments, making them ideal for various applications, including nanoelectronics, sensors, and reinforcement materials . Moreover, owing to their exceptional strength and modulus, − as well as their excellent neutron radiation absorption capabilities in harsh space environments, , there is growing interest in incorporating BNNTs into polymer matrix composites and nanocomposites to enhance their physical properties under extreme conditions such as high temperatures and oxidative atmospheres.…”

Section: Introductionmentioning

confidence: 99%

Solvent-Free Functionalized Boron Nitride Nanotubes via Open-Air Cold Plasma for Highly Stable Dispersion in Water

Jeon,

Kang,

Choi

et al. 2023

ACS Appl. Nano Mater.

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For the dispersion of boron nitride nanotubes (BNNTs), noncovalent or covalent functionalization methods in a solvent with complex procedures, including acidic treatments, are widely used. Herein, we propose a solvent-free functionalization of BNNTs using a facile atmospheric-pressure cold-plasma treatment method. The plasma-treated BNNTs exhibited nearly threefold enhanced dispersibility and fourfold improved long-term dispersion stability compared with pristine BNNTs. These remarkable enhancements were attributed to the presence of the O atoms and OH molecules generated in the plasma, which reacted with the BNNT surface to form B−N−O and OH bonds. Consequently, the wettability of the plasma-treated BNNTs was transformed to superhydrophilicity, resulting in the exfoliation of the BNNT bundles in water. Small-angle X-ray scattering measurements confirmed the successful exfoliation of plasma-treated BNNTs from bundled structures in water. From an application perspective, the atmospheric-pressure cold plasma method offers a solvent-free, straightforward, and robust approach for BNNT functionalization, eliminating the need for additional post-procedures to remove residual surfactants from BNNTs.

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Tribological and neutron radiation properties of boron nitride nanotubes reinforced titanium composites under lunar environment

Cited by 23 publications

References 32 publications

Profilometry‐Based Indentation Plastometry for Evaluating Bulk Tensile Properties of Aluminum‐Silicon Carbide Composites

Profilometry‐Based Indentation Plastometry for Evaluating Bulk Tensile Properties of Aluminum‐Silicon Carbide Composites

Exploring the Potential of Wire Fed Direct Energy Deposition of Aluminum–Boron Nitride Nanotube Composite: Microstructural Evolution and Mechanical Properties

Solvent-Free Functionalized Boron Nitride Nanotubes via Open-Air Cold Plasma for Highly Stable Dispersion in Water

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