Modified preparation technique of TEM sample for various TEM analyses of structural materials

Jin, Hyung Gon; Cho, Hae-Dong; Kwon, Sung Youn; Shin, Changsoo; Kwon, Junhyun

doi:10.1016/j.matlet.2012.08.069

Cited by 16 publications

(4 citation statements)

References 8 publications

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“…The layer is thought to be formed due to the redeposition of sputtered matrix onto the crack surface introduced by the fiber/RZ cracking when the specimen was being sputtered in the PIPS. This is consistent with a previous report that the redeposition of the sputtered matrix atoms onto the TEM specimen surface is due to low-angle or continuous long-time ion milling (Rao et al, 2010; Jin et al, 2012). On the other hand, Ti has a considerably higher milling rate than C at low-ion incidence angles.…”

Section: Resultssupporting

confidence: 93%

On Interfacial Microstructure Evolution in an Isothermally Exposed SiC Fiber-Reinforced Ti-17 Matrix Composite

Fan¹,

Zhou

2019

Microsc Microanal

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The kinetics and mechanisms of interface reactions in a unidirectional continuous SiC fiber-reinforced Ti-17 matrix composite were investigated using transmission electron microscopy and scanning electron microscopy. It was found that a reaction zone (RZ) consisting of two-layered TiC-type carbide forms at the fiber/matrix interface during fabrication of the composite. After isothermal exposure at elevated temperatures, the two-layered TiC-type carbide is inherited, and a new TiC-type carbide layer forms within the RZ after exposure at temperatures lower than 900°C, while a new Ti3C2-type carbide layer forms after exposure at 900°C. It was also observed that the growth of RZ is a diffusion-controlled and temperature-dependent process, obeying the Fick's law-based parabolic relationship and the Arrhenius equation. Two material constants, the temperature-independent rate constant k0 and activation energy Q, are determined as 31.5 × 10−4µm/s1/2 and 49.9 kJ/mol, respectively.

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Section: Resultssupporting

confidence: 93%

On Interfacial Microstructure Evolution in an Isothermally Exposed SiC Fiber-Reinforced Ti-17 Matrix Composite

Fan¹,

Zhou

2019

Microsc Microanal

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“…observation reported in literature (Jin et al, 2012;Rao et al, 2010). Further, a blank gap where no species were detected by the EDS is observed between the interfacial RZ and matrix redeposition layer in the linescan profiles, corresponding to the brightest band related to the separation denoted in Figure 4(a).…”

Section: Scrutiny Ofmentioning

confidence: 86%

A study of interface reaction zone in a SiC fibre/Ti-17 composite

Fan

Zhou

2018

Micron

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The interface reaction zone (RZ) in a unidirectional continuous carbon-coated SiC fibre reinforced Ti-17 titanium alloy composite is investigated. Micro-computed tomography (CT), scanning and transmission electron microscopy are employed to characterize the fibre/matrix interface. It is revealed that the interface RZ is a 400 nm thick titanium carbide (TiC) layer which is composed of two sublayers, a 60 nm thick fine-grained sublayer and an approximate 340 nm thick coarse-grained sublayer. The RZ is formed through chemical reaction between carbon coating on the SiC fibre surface and Ti, Zr and Sn in the alloy matrix. The reaction is controlled by atom diffusion occurring at the fibre/matrix interface. However, in the reaction process, Al, Cr and Mo in the matrix are rejected and piled up in front of the RZ on the matrix side. A structure model is proposed to describe the formation mechanism of the interface RZ.

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“…[31] Transmission electron microscopy (TEM, Tecnai G2 F20 S-Twin) was used to observe the attachment of silver nanoparticles to the mesh. [32] Thermogravimetric analysis (TGA, SDT Q600) could be used to determine the thermal stability of aerogel. [33] Generally, the temperature range was 40%800 °C.…”

Section: Characterizationmentioning

confidence: 99%

Study of Metal–Graphene Aerogel for Efficient Solar Energy Interface Evaporation Based on One‐Step Thermal Reduction Method

Wu,

Zhu,

Liu

et al. 2023

Solar RRL

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Fresh water resources can be sustainably harvested through interfacial evaporation by solar energy. To enhance the efficiency of solar interfacial evaporation, a metal graphene alcohol gel was synthesized using a one‐step thermal reduction technique. Subsequently, a metal graphene aerogel was produced using freeze‐drying technology. The hydrothermal treatment method was applied to introduce asymmetric moisture and roughness on the upper and lower surfaces of the aerogel. The unique structure of the aerogel plays a significant role in facilitating continuous water transport to the interface for evaporation. The top layer, being hydrophobic, and the bottom layer, being hydrophilic, contribute to this process. Importantly, the top layer’s design ensures that an excessively thick water film does not form, thereby preventing any adverse effects on light absorption efficiency. The aerogel exhibits an outstanding water evaporation rate (WER) is 1.75 kg·m‐2·h‐1 and a remarkable photothermal conversion efficiency (PTCE) is 93.17% under one solar radiation intensity. This is because the aerogel has a unique three‐dimensional structure. This special three‐dimensional structure has an interconnected microporous‐like appearance inside, which increases the evaporation area. Metal‐graphene aerogel is based on the electric field dielectric evaporation mechanism of metal nanoparticles localized surface plasmon resonance (LSPR) effect and the thermal mediated evaporation mechanism of graphene full spectrum. Under the double action, the photothermal conversion efficiency has been significantly improved. Our meticulously created metallic graphene aerogel performs exceptionally well at evaporating water. As a result, it presents a promising and practical avenue for exploring effective solar interfacial evaporation.This article is protected by copyright. All rights reserved.

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Modified preparation technique of TEM sample for various TEM analyses of structural materials

Cited by 16 publications

References 8 publications

On Interfacial Microstructure Evolution in an Isothermally Exposed SiC Fiber-Reinforced Ti-17 Matrix Composite

On Interfacial Microstructure Evolution in an Isothermally Exposed SiC Fiber-Reinforced Ti-17 Matrix Composite

A study of interface reaction zone in a SiC fibre/Ti-17 composite

Study of Metal–Graphene Aerogel for Efficient Solar Energy Interface Evaporation Based on One‐Step Thermal Reduction Method

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