ORCID Profile
0000-0001-8445-922X
Current Organisation
Kyushu University
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Publisher: Springer Science and Business Media LLC
Date: 07-04-2016
DOI: 10.1557/JMR.2016.123
Publisher: Elsevier BV
Date: 07-2015
Publisher: Elsevier BV
Date: 02-2017
Publisher: MDPI AG
Date: 09-11-2018
DOI: 10.3390/MA11112229
Abstract: In-situ observations of the polymorphic transformation in a single targeted Cu6Sn5 grain constrained between Sn-0.7 wt % Cu solder and Cu-Cu3Sn phases and the associated structural evolution during a solid-state thermal cycle were achieved via a high-voltage transmission electron microscope (HV-TEM) technique. Here, we show that the monoclinic η′-Cu6Sn5 superlattice reflections appear in the hexagonal η-Cu6Sn5 diffraction pattern upon cooling to isothermal 140 °C from 210 °C. The in-situ real space imaging shows that the η′-Cu6Sn5 contrast pattern is initiated at the grain boundary. This method demonstrates a new approach for further understanding the polymorphic transformation behavior on a real solder joint.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2NR01982E
Abstract: After Pt@Co core–shell nanoparticles were annealed under appropriate conditions, L1 0 –PtCo structure was formed near the particle surface.
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier BV
Date: 2017
Publisher: Wiley
Date: 10-03-2021
Publisher: American Chemical Society (ACS)
Date: 28-08-2020
Publisher: American Physical Society (APS)
Date: 17-06-2020
Publisher: American Chemical Society (ACS)
Date: 26-02-2019
Publisher: Elsevier BV
Date: 04-2018
Publisher: American Chemical Society (ACS)
Date: 28-12-2021
Abstract: Compositional and structural arrangements of constituent elements, especially those at the surface and near-surface layers, are known to greatly influence the catalytic performance of alloyed nanoparticles (NPs). Although much research effort often focuses on the ability to tailor these important aspects in the design stage, their stability under realistic operating conditions remains a major technical challenge. Here, the compositional stability and associated structural evolution of a ternary iridium-palladium-ruthenium (Ir-Pd-Ru) nanoalloy at elevated temperatures have been studied using interrupted
Publisher: Trans Tech Publications, Ltd.
Date: 05-2016
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.857.49
Abstract: Phosphorus (P) is often added to wave-solder baths as an anti-oxidation agent for older generation eutectic Sn-37wt%Pb solders. For Pb-free solder alloys trace amounts of germanium (Ge) have been added successfully in Sn-0.7wt%Cu-0.05wt%Ni for anti-oxidation purposes during the wave soldering process. Despite this practice, there is little information on how P and Ge distribute in solder alloys and dross in this alloy system. In this paper, the effects of combinations of trace levels of Ge ( 100ppm) and P ( 100ppm) in Sn-Cu-Ni solder alloys and their dross has been investigated by XRD and SEM/EDS. It was found that the weight fraction of tin oxides in the dross is increased with an addition of less than 100ppm P. The dross consists on SnO oxide with Sn in s les containing Ge and no P, while SnO and SnO 2 oxide are both present when P and Ge additions are made. In s les containing P, (Cu,Ni) 6 Sn 5 and Ni-P and/or Ni-Sn-P intermetallics particles were found.
Publisher: American Chemical Society (ACS)
Date: 10-10-2019
DOI: 10.1021/ACS.JPCLETT.9B02818
Abstract: We report a comprehensive
Publisher: Springer Science and Business Media LLC
Date: 13-02-2015
DOI: 10.1038/SREP08450
Abstract: Hydrogen has the potential to power much of the modern world with only water as a by-product, but storing hydrogen safely and efficiently in solid form such as magnesium hydride remains a major obstacle. A significant challenge has been the difficulty of proving the hydriding/dehydriding mechanisms and, therefore, the mechanisms have long been the subject of debate. Here we use in situ ultra-high voltage transmission electron microscopy (TEM) to directly verify the mechanisms of the hydride decomposition of bulk MgH 2 in Mg-Ni alloys. We find that the hydrogen release mechanism from bulk (2 μm) MgH 2 particles is based on the growth of multiple pre-existing Mg crystallites within the MgH 2 matrix, present due to the difficulty of fully transforming all Mg during a hydrogenation cycle whereas, in thin s les analogous to nano-powders, dehydriding occurs by a ‘shrinking core’ mechanism.
Publisher: Elsevier BV
Date: 11-2020
Publisher: Springer Science and Business Media LLC
Date: 07-04-2017
DOI: 10.1038/SREP43720
Abstract: In a comment on our Article “Evidence of the hydrogen release mechanism in bulk MgH 2 ”, Surrey et al . assert that the MgH 2 s le we studied was not MgH 2 at any time but rather MgO and that the transformation we observed was the formation of Kirkendall voids due to the outward diffusion of Mg. We address these issues in this reply.
Publisher: Elsevier BV
Date: 02-2019
No related grants have been discovered for Xuan Quy Tran.