scholarly journals Investigating ion release using inline ICP during in situ scratch testing of an Mg-Li(-Al-Y-Zr) alloy

2019 ◽  
Vol 99 ◽  
pp. 46-50 ◽  
Author(s):  
Yuanming Yan ◽  
Peng Zhou ◽  
Oumaïma Gharbi ◽  
Zhuoran Zeng ◽  
Xiaobo Chen ◽  
...  
Keyword(s):  
Scratch Testing ◽  
Ion Release ◽  
Zr Alloy

scholarly journals Investigating ion release using inline ICP during in situ scratch testing of an Mg-Li(-Al-Y-Zr) alloy

2018 ◽  
Author(s):  
Yuanming Yan ◽  
Peng Zhou ◽  
Oumaïma Gharbi ◽  
Zhuoran Zeng ◽  
Xiaobo Chen ◽  
...  
Keyword(s):  
Dissolution Rate ◽  
Inductively Coupled Plasma ◽  
Surface Film ◽  
Open Circuit ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission Spectrometry ◽  
Ion Release ◽  
Dissolution Rates ◽  
Zr Alloy

An electrochemical flow cell was constructed to permit the application of a mechanical scratch to the exposed material while monitoring the open circuit dissolution rates of the elemental alloy components. Elemental dissolution rates were determined where measured downstream using inductively coupled plasma atomic emission spectrometry (ICP-AES). The technique is demonstrated with Mg-Li(-Al-Y-Zr) alloy exposed to 0.01 M NaCl. A mechanical scratch was applied manually using a non-conductive and non-contaminating sapphire lancet without interrupting the on-line measurement. The ion dissolution rate from the newly exposed surface was significantly higher than the dissolution rate from the remaining surface area, corresponding to a high local current density. Notably, the increase in the dissolution rate from the scratched area occurred gradually after the scratch; then subsided within 200 s after the scratch, indicating that this particular Mg-alloy can repassivate by the formation of a surface film after a scratch was applied. This is the first reported use of an in situ scratch cell coupled with operando ICP-AES.

Enhanced plasticity of the oxide scales by in-situ formed Cr2O3/Cr heterostructures for Cr-based coatings on Zr alloy in 1200°C steam

2021 ◽  
pp. 109361
Author(s):  
Haiyong Liu ◽  
Yajie Feng ◽  
Peng Li ◽  
Xiaoguang Shi ◽  
Han Zhu ◽  
...  
Keyword(s):  
Oxide Scales ◽  
Zr Alloy

Investigation of the adhesion strength and deformation behaviour of in situ fabricated NbC coatings by scratch testing

2016 ◽  
Vol 299 ◽  
pp. 135-142 ◽  
Author(s):  
Xiaolong Cai ◽  
Yunhua Xu ◽  
Nana Zhao ◽  
Lisheng Zhong ◽  
Ziyuan Zhao ◽  
...  
Keyword(s):  
Adhesion Strength ◽  
Deformation Behaviour ◽  
Scratch Testing ◽  
Strength And Deformation

scholarly journals Rheological Characterization of Hydrogels from Alginate-Based Nanodispersion

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 259 ◽  
Author(s):  
Francesca Cuomo ◽  
Martina Cofelice ◽  
Francesco Lopez
Keyword(s):  
Essential Oil ◽  
Tween 80 ◽  
Creep Recovery ◽  
Ion Release ◽  
Rheological Characterization ◽  
Burger Model ◽  
Food Industries ◽  
Hydrogel Network

The interest toward alginate and nanoemulsion-based hydrogels is driven by the wide potential of application. These systems have been noticed in several areas, ranging from pharmaceutical, medical, coating, and food industries. In this investigation, hydrogels prepared through in situ calcium ion release, starting from lemongrass essential oil nanodispersions stabilized in alginate aqueous suspensions in the presence of the nonionic surfactant Tween 80, were evaluated. The hydrogels prepared at different concentrations of oil, alginate, and calcium were characterized through rheological tests. Flow curves demonstrate that the hydrogels share shear thinning behavior. Oscillatory tests showed that the strength of the hydrogel network increases with the crosslinker increase, and decreases at low polymer concentrations. The hydrogels were thixotropic materials with a slow time of structural restoration after breakage. Finally, by analyzing the creep recovery data, the hydrogel responses were all fitted to the Burger model. Overall, it was demonstrated that the presence of essential oil in the proposed hydrogels does not affect the mechanical characteristics of the materials, which are mainly influenced by the concentration of polymer and calcium as a crosslinker.

scholarly journals On the in-situ aqueous stability of an Mg-Li-(Al-Y-Zr) alloy: Role of Li

2020 ◽  
Vol 164 ◽  
pp. 108342 ◽  
Author(s):  
Y.M. Yan ◽  
A. Maltseva ◽  
P. Zhou ◽  
X.J. Li ◽  
Z.R. Zeng ◽  
...  
Keyword(s):  
Zr Alloy

Fabrication of Cu-ZrO2 composites by in situ oxidation of liquid Cu–Zr alloy

2020 ◽  
Vol 22 (4) ◽  
Author(s):  
Kun Xie ◽  
Chang Han ◽  
Jing Liu ◽  
Yunliang Tan
Keyword(s):  
In Situ Oxidation ◽  
Zr Alloy

scholarly journals A Novel Two-Axis Load Sensor Designed for in Situ Scratch Testing inside Scanning Electron Microscopes

Sensors ◽  
2013 ◽  
Vol 13 (2) ◽  
pp. 2552-2565 ◽  
Author(s):  
Hu Huang ◽  
Hongwei Zhao ◽  
Boda Wu ◽  
Shunguang Wan ◽  
Chengli Shi
Keyword(s):  
Scratch Testing ◽  
Load Sensor ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Scanning Electron

scholarly journals Influence of Calcium Phosphate and Apatite Containing Products on Enamel Erosion

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
A. Kensche ◽  
S. Pötschke ◽  
C. Hannig ◽  
G. Richter ◽  
W. Hoth-Hannig ◽  
...  
Keyword(s):  
Oral Cavity ◽  
Oral Exposure ◽  
Ion Release ◽  
Pellicle Formation ◽  
Protective Properties ◽  
Ph Values ◽  
Mineral Components ◽  
Tooth Mousse ◽  
Bovine Enamel

For the purpose of erosion prevention the present study aimed to compare the efficacy of two biomimetic products and a fluoride solution to optimize the protective properties of the pellicle. After 1 min ofin situpellicle formation on bovine enamel slabs, 8 subjects adopted CPP-ACP (GC Tooth Mousse), a mouthwash with hydroxyapatite microclusters (Biorepair), or a fluoride based mouthwash (elmex Kariesschutz) for 1 min each. Afterwards, samples were exposed in the oral cavity for 28 min. Native enamel slabs and slabs exposed to the oral cavity for 30 min without any rinse served as controls. After oral exposure, slabs were incubated in HCl (pH values 2, 2.3, and 3) for 120 s and kinetics of calcium and phosphate release were measured photometrically; representative samples were evaluated by SEM and TEM. The physiological pellicle reduced demineralization at all pH values; the protective effect was enhanced by fluoride. The biomimetic materials also reduced ion release but their effect was less pronounced. SEM indicated no layer formation after use of the different products. However, TEM confirmed the potential accumulation of mineral components at the pellicle surface. The tested products improve the protective properties of thein situpellicle but not as effectively as fluorides.

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