Defect Behavior and Radiation Tolerance of Mab Phases (Moalb and Fe 2AIB 2) with Comparison to Max Phases

2020 ◽  
Author(s):  
Hongliang Zhang ◽  
Jun Young Kim ◽  
Ranran Su ◽  
Peter Richardson ◽  
Jianqi Xi ◽  
...  
Keyword(s):  
Radiation Tolerance ◽  
Max Phases ◽  
Defect Behavior

scholarly journals Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

2020 ◽  
Vol 196 ◽  
pp. 505-515 ◽  
Author(s):  
Hongliang Zhang ◽  
Jun Young Kim ◽  
Ranran Su ◽  
Peter Richardson ◽  
Jianqi Xi ◽  
...  
Keyword(s):  
Radiation Tolerance ◽  
Max Phases ◽  
Defect Behavior

Elastic behaviour and radiation tolerance in Nb-based 211 MAX phases

2020 ◽  
Vol 25 ◽  
pp. 101499
Author(s):  
M.A. Hadi ◽  
S.-R.G. Christopoulos ◽  
A. Chroneos ◽  
S.H. Naqib ◽  
A.K.M.A. Islam
Keyword(s):  
Elastic Behaviour ◽  
Radiation Tolerance ◽  
Max Phases

Applications of two dimensional material-MXene for proton exchange membrane fuel cells (PEMFCs) and water electrolysis

2020 ◽  
Vol 16 ◽  
Author(s):  
Chanchan Fan ◽  
Peng Zhang ◽  
Ranran Wang ◽  
Yezhu Xu ◽  
Xingrui Sun ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Water Splitting ◽  
Proton Exchange Membrane ◽  
Layer Structure ◽  
Metal Layer ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Two Dimensional ◽  
Max Phases ◽  
Early Transition Metal

: A new kind of two-dimensional (2D) materials MXene (early transition metal carbides, nitrides and carbonitrides) is obtained by selective etching the A element from the MAX phases. MXene exhibits both the metallic conductivity and the hydrophilic nature due to its metal layer structure and hydroxyl or oxygen terminated surfaces. This review provides an overview of the MXene used in the electrolytes and electrodes for the fuel cells and water splitting. MXene with functional groups termination could construct ion channels that significantly benefits to the ion conductivity through the electrolyte. The metal supported by MXene interaction offers electronic, compositional, and geometric effects that could enhance the catalytic activity and stability. MXene have already shown promising performance for fuel cells and water electrolysis. Herein, the etching and intercalation methods of MXene in recent years are summarized. The applications of MXene for fuel cells electrolyte, catalyst and water splitting catalyst are revealed to provide more brief idea for MXene used as new energy materials.

Oxidation mechanism of MAX phases (Ti3AlC2 powders) with and without Sn doping

2021 ◽  
Vol 180 ◽  
pp. 109197
Author(s):  
Chunyu Guo ◽  
Enhui Wang ◽  
Shuize Wang ◽  
Xinmei Hou ◽  
Zhijun He ◽  
...  
Keyword(s):  
Oxidation Mechanism ◽  
Max Phases ◽  
Sn Doping

Effects of Concurrent Co or Ti Silicidation on Transient Diffusion and End-of-Range Damage in Phosphorus Implanted Silicon

1992 ◽  
Vol 262 ◽  
Author(s):  
J.W. Honeycutt ◽  
J. Ravi ◽  
G. A. Rozgonyi
Keyword(s):  
Secondary Ion Mass Spectrometry ◽  
Complete Removal ◽  
Dislocation Loops ◽  
Enhanced Diffusion ◽  
Depth Profiles ◽  
Enhanced Dissolution ◽  
Implantation Damage ◽  
Transmission Electron ◽  
Defect Behavior ◽  
Secondary Ion

ABSTRACTThe effects of Ti and Co silicidation on P+ ion implantation damage in Si have been investigated. After silicidation of unannealed 40 keV, 2×1015 cm-2 P+ implanted junctions by rapid thermal annealing at 900°C for 10–300 seconds, secondary ion mass spectrometry depth profiles of phosphorus in suicided and non-silicided junctions were compared. While non-silicided and TiSi2 suicided junctions exhibited equal amounts of transient enhanced diffusion behavior, the junction depths under COSi2 were significantly shallower. End-of-range interstitial dislocation loops in the same suicided and non-silicided junctions were studied by planview transmission electron microscopy. The loops were found to be stable after 900°C, 5 minute annealing in non-silicided material, and their formation was only slightly effected by TiSi2 or COSi2 silicidation. However, enhanced dissolution of the loops was observed under both TiSi2 and COSi2, with essentially complete removal of the defects under COSi2 after 5 minutes at 900°C. The observed diffusion and defect behavior strongly suggest that implantation damage induced excess interstitial concentrations are significantly reduced by the formation and presence of COSi2, and to a lesser extent by TiSi2. The observed time-dependent defect removal under the suicide films suggests that vacancy injection and/or interstitial absorption by the suicide film continues long after the suicide chemical reaction is complete.

scholarly journals Radiation tolerance of online trigger system for COMET Phase-I

2021 ◽  
pp. 1-1
Author(s):  
Sam Dekkers ◽  
Yu Nakazawa ◽  
Yuki Fujii ◽  
Hisataka Yoshida ◽  
Ting Sam Wong ◽  
...  
Keyword(s):  
Phase I ◽  
Radiation Tolerance ◽  
Trigger System

Advances in MXene Films: Synthesis, Assembly, and Applications

2021 ◽  
Author(s):  
Xiaohua Li ◽  
Feitian Ran ◽  
Fan Yang ◽  
Jun Long ◽  
Lu Shao
Keyword(s):  
Spin Coating ◽  
Reaction Mechanisms ◽  
Membrane Separation ◽  
Synthesis Methods ◽  
Metal Carbides ◽  
Max Phases ◽  
Practical Applications ◽  
Coating Methods ◽  
And Performance ◽  
Important Form

AbstractA growing family of two-dimensional (2D) transition metal carbides or nitrides, known as MXenes, have received increasing attention because of their unique properties, such as metallic conductivity and good hydrophilicity. The studies on MXenes have been widely pursued, given the composition diversity of the parent MAX phases. This review focuses on MXene films, an important form of MXene-based materials for practical applications. We summarized the synthesis methods of MXenes, focusing on emerging synthesis strategies and reaction mechanisms. The advanced assembly technologies of MXene films, including vacuum-assisted filtration, spin-coating methods, and several other approaches, were then highlighted. Finally, recent progress in the applications of MXene films in electrochemical energy storage, membrane separation, electromagnetic shielding fields, and burgeoning areas, as well as the correlation between compositions, architecture, and performance, was discussed.

scholarly journals Synthesis of high quality 2D carbide MXene flakes using a highly purified MAX precursor for ink applications

2021 ◽  
Author(s):  
Shi-Hyun Seok ◽  
Seungjun Choo ◽  
Jinsung Kwak ◽  
Hyejin Ju ◽  
Ju-Hyoung Han ◽  
...  
Keyword(s):  
Raw Materials ◽  
High Quality ◽  
Max Phases ◽  
Painting Process ◽  
Manufacturing Techniques

A method of pelletizing raw materials was used to tackle unwarranted variations in MXene products depending on the parent MAX phases, manufacturing techniques, and preparation parameters, enabling a direct painting process on various surfaces for ink applications.

scholarly journals Radiation Tolerance in Nano-Structured Crystalline Fe(Cr)/Amorphous SiOC Composite

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 147
Author(s):  
Qing Su ◽  
Tianyao Wang ◽  
Lin Shao ◽  
Michael Nastasi
Keyword(s):  
Amorphous Silicon ◽  
Grain Growth ◽  
Irradiation Dose ◽  
Room Temperature ◽  
Silicon Oxycarbide ◽  
Radiation Response ◽  
Radiation Tolerance ◽  
Width Direction ◽  
Cr Film ◽  
Radiation Tolerant

The management of irradiation defects is one of key challenges for structural materials in current and future reactor systems. To develop radiation tolerant alloys for service in extreme irradiation environments, the Fe self-ion radiation response of nanocomposites composed of amorphous silicon oxycarbide (SiOC) and crystalline Fe(Cr) were examined at 10, 20, and 50 displacements per atom damage levels. Grain growth in width direction was observed to increase with increasing irradiation dose in both Fe(Cr) films and Fe(Cr) layers in the nanocomposite after irradiation at room temperature. However, compared to the Fe(Cr) film, the Fe(Cr) layers in the nanocomposite exhibited ~50% less grain growth at the same damage levels, suggesting that interfaces in the nanocomposite were defect sinks. Moreover, the addition of Cr to α-Fe was shown to suppress its grain growth under irradiation for both the composite and non-composite case, consistent with earlier molecular dynamic (MD) modeling studies.

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