MDPI - Publisher of Open Access Journals

11 pages, 3535 KiB

Open AccessFeature PaperArticle

Effect of Cold Deformation on the Hydrogen Permeation Behavior of X65 Pipeline Steel

by Chan Yao, Hongliang Ming, Jian Chen, Jianqiu Wang and En-Hou Han

Coatings 2023, 13(2), 280; https://doi.org/10.3390/coatings13020280 - 26 Jan 2023

Cited by 19 | Viewed by 2883

In this study, an electrochemical hydrogen permeation experiment was used to determine the diffusion parameters, and a hydrogen microprint test was used to visualize the distribution of hydrogen in X65 pipeline steel with different levels of cold deformation. The hydrogen permeation curves show that both hydrogen permeation current density and effective hydrogen diffusion coefficient decrease with increasing cold deformation. The density of reversible and irreversible hydrogen traps is calculated from the permeation parameters, and it is found that the amount of both traps increases with increasing deformation, especially a significant increase in reversible hydrogen traps, which is in agreement with the results measured by thermal desorption spectroscopy. Hydrogen microprint test results indicate that the degree of hydrogen aggregation on the specimen surface increases with increasing cold deformation, especially at phase and grain boundaries. In addition, the dislocation configuration after cold deformation was further investigated by transmission electron microscopy. Full article

(This article belongs to the Topic Environmental Sensitivity and Safety Assessment of Materials)

► Show Figures

Figure 1

10 pages, 3361 KiB

Open AccessArticle

High-Throughput Nanoparticle Chemisorption Printing of Chemical Sensors with High-Wiring-Density Electrodes

by Jun’ya Tsutsumi

Electron. Mater. 2021, 2(2), 72-81; https://doi.org/10.3390/electronicmat2020007 - 8 Apr 2021

Viewed by 2603

Abstract

We report on the high-throughput non-lithographic microprinting of a high-wiring-density interdigitated array electrode (line and space = 5 µm/5 µm), based on a facile wet/dewet patterning of silver nanoparticle ink. The trade-off between high-density wiring and pattern collapse in the wet/dewet patterning is overcome by employing a new herringbone design of interdigitated array electrode. We demonstrate electrochemical sensing of p-benzoquinone by the fabricated interdigitated array electrode, showing a typical steady-state I–V characteristics with superior signal amplification benefiting from the redox cycling effect. Our findings provide a new technical solution for the scalable manufacture of advanced chemical sensors, with an economy of scale that cannot be realized by other techniques. Full article

► Show Figures

Figure 1

14 pages, 6528 KiB

Open AccessFeature PaperArticle

Additive Manufacturing of Sub-Micron to Sub-mm Metal Structures with Hollow AFM Cantilevers

by Giorgio Ercolano, Cathelijn van Nisselroy, Thibaut Merle, János Vörös, Dmitry Momotenko, Wabe W. Koelmans and Tomaso Zambelli

Micromachines 2020, 11(1), 6; https://doi.org/10.3390/mi11010006 - 18 Dec 2019

Cited by 46 | Viewed by 23642

Abstract

We describe our force-controlled 3D printing method for layer-by-layer additive micromanufacturing (µAM) of metal microstructures. Hollow atomic force microscopy cantilevers are utilized to locally dispense metal ions in a standard 3-electrode electrochemical cell, enabling a confined electroplating reaction. The deflection feedback signal enables the live monitoring of the voxel growth and the consequent automation of the printing protocol in a layer-by-layer fashion for the fabrication of arbitrary-shaped geometries. In a second step, we investigated the effect of the free parameters (aperture diameter, applied pressure, and applied plating potential) on the voxel size, which enabled us to tune the voxel dimensions on-the-fly, as well as to produce objects spanning at least two orders of magnitude in each direction. As a concrete example, we printed two different replicas of Michelangelo’s David. Copper was used as metal, but the process can in principle be extended to all metals that are macroscopically electroplated in a standard way. Full article

(This article belongs to the Special Issue Multi-Dimensional Direct-Write Nanofabrication )

► Show Figures

Figure 1

Search Results (3)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI

Saved Queries

Search Filter Reset All

Years

Feature Papers

Subjects

Journals

Article Types

Countries / Regions

Search Results (3)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI