Enhanced fracture toughness of Al and Bi co-doped Mg2Si by metal nanoparticle decoration

Kim, Gwansik; Lee, Hwijong; Kim, Jeongmin; Roh, Jong Wook; Lyo, Inwoong; Kim, Byung‐Wook; Lee, Kyu Hyoung; Lee, Wooyoung

doi:10.1016/j.ceramint.2017.06.002

Cited by 15 publications

(15 citation statements)

References 18 publications

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“…However, few systematic researches have addressed this issue so far. In our previous reports, the ZT and the K Ic of nanocomposites incorporating various nanophases (e.g., metal nanoparticles, reduced graphene oxides (rGOs), and dual nanoinclusions) were introduced [9][10][11][12]. We demonstrated the occurrence of a strong trade-off relationship between the ZT and the K Ic of Mg 2 Si-based TE nanocomposites, strongly dependent on the interface density.…”

Section: Introductionmentioning

confidence: 76%

“…Despite the high ZT value, the low mechanical reliability (fracture toughness, K Ic ~ 0.82) of Mg 2 Si limits its application to silicide-based TE modules [9]. The large temperature difference between the two electrodes of the TE module under the ATEG operating conditions generally induces thermal and mechanical stress in the TE materials, leading to a breakdown of the TE module electric circuit.…”

Section: Introductionmentioning

confidence: 99%

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Intercorrelated Relationship Between the Thermoelectric Performance and Mechanical Reliability of Mg2Si-Reduced Graphene Oxide Nanocomposites

Kim

Lee

2020

Electron. Mater. Lett.

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We fabricated Mg 2 Si-based thermoelectric nanocomposites with reduced graphene oxide using ultrasonic-based wet chemical pulverizing-mixing and spark plasma sintering to improve the trade-off relationship between thermoelectric properties and mechanical reliability. The dependence of thermoelectric properties and mechanical reliability on the nanophase morphologies has been systemically investigated, demonstrating the fracture toughness of the nanocomposite with thin reduced graphene oxide significantly increased. Moreover, the introduction of the few-layered reduced graphene oxide with high interface density was more effective in improving the trade-off relationship. This result suggests that an in-depth research on the dependence of the thermoelectric properties and mechanical reliability on the intrinsic properties of the nanophases is required to prepare efficient thermoelectric nanocomposites.

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Section: Introductionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Intercorrelated Relationship Between the Thermoelectric Performance and Mechanical Reliability of Mg2Si-Reduced Graphene Oxide Nanocomposites

Kim

Lee

2020

Electron. Mater. Lett.

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“…More recently, the increase in toughness was observed in Ni-containing Al 2 O 3 composites and explained by an increase in grain boundary strength and decreasing the crack driving energy [ 55 ]. In another work [ 56 ], the fracture toughness of Mg 2 Si was significantly improved by an addition of Al nanoparticles.…”

Section: Discussionmentioning

confidence: 99%

The Chemical and Biological Properties of Nanohydroxyapatite Coatings with Antibacterial Nanometals, Obtained in the Electrophoretic Process on the Ti13Zr13Nb Alloy

Bartmański

Pawłowski

Belcarz

et al. 2021

IJMS

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The risk of an early inflammation after implantation surgery of titanium implants has caused the development of different antimicrobial measures. The present research is aimed at characterizing the effects of nanosilver and nanocopper dispersed in the nanohydroxyapatite coatings, deposited on the Ti13Zr13Nb alloy, and on the chemical and biological properties of the coatings. The one-stage deposition process was performed by the electrophoretic method at different contents of nanomaterials in suspension. The surface topography of the coatings was examined with scanning electron microscopy. The wettability was expressed as the water contact angle. The corrosion behavior was characterized by the potentiodynamic technique. The release rate of copper and silver into the simulated body fluid was investigated by atomic absorption spectrometry. The antibacterial efficiency was evaluated as the survivability and adhesion of the bacteria and the growth of the biofilm. The cytotoxicity was assessed for osteoblasts. The results demonstrate that silver and copper increase the corrosion resistance and hydrophilicity. Both elements together effectively kill bacteria and inhibit biofilm growth but appear to be toxic for osteoblasts. The obtained results show that the nanohydroxyapatite coatings doped with nanosilver and nanocopper in a one-stage electrophoretic process can be valuable for antibacterial coatings.

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“…Using this process, metal nanoparticles several tens of nanometers in size were introduced into the silicide-based TE powders, which affected the TE and mechanical properties. 11,12,34) Wet chemical mixing is a method for blending powders and nanophases uniformly. As this process is carried out in a solvent, it can effectively increase the uniformity of the nanophases and prevent agglomeration of the matrix and nanophases, compared to other processes.…”

Section: Processing Technologies For Nanocompositesmentioning

confidence: 99%

“…7) Unfortunately, the silicide-based TE materials have disadvantages such as low TE properties of HMS (ZT 0.5-0.6) and low fracture toughness (K Ic ) of Mg 2 Si (~0.82 MPa m 1/2 ). [8][9][10][11] These disadvantages must be overcome to expand application of these TE materials. Therefore, we need to investigate the TE and mechanical properties of silicide-based TE materials to simultaneously obtain a high conversion efficiency and mechanical reliability of the TE module.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Silicide-based Thermoelectric Nanocomposites: A Review

Kim

Lee³

2019

J. Korean Ceram. Soc

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Thermoelectric is a promising technology that can convert temperature differences to electricity (or vice versa). However, their relatively low efficiencies limit their applications to thermoelectric power generation systems. Therefore, low cost and high performance are important prerequisites for the application of thermoelectric materials to automotive thermoelectric generators. Silicide-based thermoelectric materials are good candidates for such applications. Recently, the thermoelectric performances of silicide-based thermoelectric materials have been significantly improved. However, increasing the thermoelectric performance of the materials while ensuring mechanical reliability remains a challenge. This review summarizes the preparation and design guidelines for silicide-based thermoelectric nanocomposites, as well as our recent progress in the development of nanocomposites with high thermoelectric performances or high mechanical reliabilities.

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Enhanced fracture toughness of Al and Bi co-doped Mg2Si by metal nanoparticle decoration

Cited by 15 publications

References 18 publications

Intercorrelated Relationship Between the Thermoelectric Performance and Mechanical Reliability of Mg2Si-Reduced Graphene Oxide Nanocomposites

Intercorrelated Relationship Between the Thermoelectric Performance and Mechanical Reliability of Mg2Si-Reduced Graphene Oxide Nanocomposites

The Chemical and Biological Properties of Nanohydroxyapatite Coatings with Antibacterial Nanometals, Obtained in the Electrophoretic Process on the Ti13Zr13Nb Alloy

Fabrication of Silicide-based Thermoelectric Nanocomposites: A Review

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