Direct metal laser sintering synthesis of carbon nanotube reinforced Ti matrix composites: Densification, distribution characteristics and properties

Chang, Kun; Gu, Dongdong

doi:10.1557/jmr.2015.403

Cited by 28 publications

(6 citation statements)

References 35 publications

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“…The consequence of this is greater Marangoni flows within the melt pool giving rise to better deagglomeration and dispersion of the CNTs prior to solidification. [14] This improved CNT dispersion correlates to the observed increases in hardness up to a critical point, where CNTs have reached a maximum distribution. Beyond this critical energy point, the melt pool becomes more unstable and porosity becomes the dominant effect on hardness.…”

Section: Effect On Microhardnessmentioning

confidence: 69%

“…In Figure 7a an intact CNT is observed moving in and out of plane of the observable surface-identified by its dimensions and charging of electrons. It is noteworthy that this appears to be the first study on the SLM of Ti-CNT where some CNTs survive into the final printed structure; this is attributed to the lower laser energy density used as compared to previous studies [13,14,29] and the relatively high purity (>95 wt%) of CNTs used in the current study. Figure 7b then shows a linear chain of carbides with similar morphology to the nanotubes used in this study, representing a CNT that has entirely reacted to TiC x .…”

Section: Effects On Microstructurementioning

confidence: 80%

“…These enhancements were attributed to the complete reaction of the CNTs with the Ti to form evenly distributed TiC x within the finished part. Another study, by Chang and Gu, [14] investigated the effects of altering the laser scan speed within SLM to produce a Ti-metal matrix composite (MMC) reinforced by evenly distributed CNTs. Their work showed that increasing the laser energy input resulted in increased wettability of the CNTs and increased convective Marangoni flows within the melt pool that promoted uniform dissemination of the CNTs.…”

Section: Introductionmentioning

confidence: 99%

“…However, other literature has shown there is a limit to increased mechanical properties with increased energy input, exceeding which can lead to unstable melt pools, spattering, keyholing, and alloy constituent vaporization-all having deleterious effects on the final part. [14][15][16] Because of this, there exists a need to better understand the effects of these process parameters to control the uniform manufacture of 3D-printed Ti-CNT composites.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Laser Energy Density on Carbon‐Nanotube‐Reinforced Titanium Composites Printed via Selective Laser Melting

2021

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3D‐printing‐reinforced metal matrix composites are a promising avenue for fabricating materials to meet the demands of the 21st century. Ti–6Al–4 V has been a useful material in the aerospace and medical industries for decades due to its incredible strength‐to‐weight ratio, and now its suitability for additive manufacturing has made it even more desirable. One of the leading‐edge reinforcements being studied for metal matrix composites is carbon nanotubes due to their remarkable mechanical properties such as strength and elastic modulus. It is desirable to manufacture advanced metal matrix composites using advanced manufacturing techniques such as selective laser melting. Herein, the effect of 1 vol% carbon nanotube reinforcements on the microstructural evolution and properties of selective‐laser‐melt‐printed Ti64 and the interrelationships with laser energy density, laser power, and laser scan speed are investigated. The effectiveness of reinforcement and influence of printing parameters are assessed via microstructural and porosity analysis, and microhardness testing. Utilizing selective laser melting with a laser energy density of 60 J mm−3, a >99% dense Ti–CNT composite is manufactured with microhardness of 4.75 GPa—a 30% enhancement over its Ti64 counterpart.

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Section: Effect On Microhardnessmentioning

confidence: 69%

Section: Effects On Microstructurementioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Laser Energy Density on Carbon‐Nanotube‐Reinforced Titanium Composites Printed via Selective Laser Melting

2021

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“…У більшості досліджень автори вивчають взаємодію металу з суто вуглецевими наночастинками [6][7][8][9], в той час існує велика кількість модифікованих вуглецевих наночастинок, хімія поверхні яких значно відрізняється від хімії чисто вуглецевої структури. Такі модифіковані вуглецеві наночастинки можуть значно інакшим чином взаємодіяти з металевою матрицею, і дослідження особливостей такої взаємодії теоретичними і експериментальними методами є актуальним завданням сучасних пошуків нових композитних матеріалів.…”

Section: вступunclassified

Theoretical simulation of the interaction of Fe2 cluster with A N, B, Si-containing carbon graphene-like plane

Demianenko¹,

Terets²,

Zhuravskyi³

et al. 2022

Poverhn.

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Metal composites modified with various heteroatoms, such as N, B, Si, are used to obtain matrix composites with specified parameters with the strongest adhesive-cohesive bonds between metal atoms and a carbon nanoparticle. Such carbon nanoparticles functionalized with heteroatoms are promising for many metal composites. One of the interesting and promising metals as a matrix for such research work is iron. To predict the specifics of the interaction of iron with the surface of carbon nanomaterials supplemented with heteroatoms of different chemical structure, it is advisable to model such processes using quantum chemistry methods. The aim of the work was to find out the effect of temperature on the chemical interaction of iron clusters with native, boron-, silicon-, and nitrogen-containing graphene-like planes (GLP). The results of the calculations show that the highest value of the energy effect of the chemical interaction for the native graphene-like plane is +204.3 kJ/mol, in the case of calculations both by the B3LYP/6-31G(d,p) method and by the MP2/6-31G(d, p) (+370.7 kJ/mol). The lower value of the energy effect is found in the presence of nitrogen atoms in the composition of the graphene-like plane. This value is even lower for the interaction of iron dimers with a silicon-containing carbon nanocluster. The lowest values of the energy effect, calculated by both methods, are characteristic of the boron-containing graphene-like plane. In particular, for the B3LYP/6-31G(d,p) method, the value of the energy effect of the reaction is ‑210.5 kJ/mol, and for the MP2/6-31G(d,p) method this value is +16.6 kJ/mol. The presence of boron atoms in the composition of the nanocarbon matrix best contributes to the interaction with the iron nanocluster, regardless of the chosen research method. The dependence curves of the Gibbs free energy of the interaction of iron dimers with a graphene-like plane and its derivatives in all cases qualitatively correlate with similar energy effects. In addition, in all cases, the values of the Gibbs free energy increase with increasing temperature.

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Additive Manufacturing of Metal‐Matrix and Polymer‐Matrix Composites

Biswas,

Jasti

2024

Additive Manufacturing With Novel Materials

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Direct metal laser sintering synthesis of carbon nanotube reinforced Ti matrix composites: Densification, distribution characteristics and properties

Abstract: Abstract

Cited by 28 publications

References 35 publications

Effects of Laser Energy Density on Carbon‐Nanotube‐Reinforced Titanium Composites Printed via Selective Laser Melting

Effects of Laser Energy Density on Carbon‐Nanotube‐Reinforced Titanium Composites Printed via Selective Laser Melting

Theoretical simulation of the interaction of Fe2 cluster with A N, B, Si-containing carbon graphene-like plane

Additive Manufacturing of Metal‐Matrix and Polymer‐Matrix Composites

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