scholarly journals Rapid in situ formation and densification of titanium boride (TiB) nano-ceramic via transient liquid phase in electric field activated sintering

2016 ◽  
Vol 123 ◽  
pp. 95-99 ◽  
Author(s):  
J. Du ◽  
A.P. Sanders ◽  
V. Jindal ◽  
K.S. Ravi Chandran
Keyword(s):  
Liquid Phase ◽  
Electric Field ◽  
Transient Liquid Phase ◽  
Titanium Boride ◽  
Activated Sintering ◽  
In Situ Formation

In-Situ formation of Li3PS4 from liquid phase on Li metal as key material for Li dendrite suppression: a short review

2019 ◽  
Vol 16 ◽  
pp. 36-41
Author(s):  
Atsunori Matsuda ◽  
Reiko Matsuda ◽  
Hiroyuki Muto ◽  
Nguyen H.H. Phuc
Keyword(s):  
Liquid Phase ◽  
Short Review ◽  
In Situ Formation

Phase Transformations in the Brazing Joint during Transient Liquid Phase Bonding of a γ-TiAl Alloy Studied with In Situ High-Energy X-Ray Diffraction

2018 ◽  
Vol 941 ◽  
pp. 943-948
Author(s):  
Katja Hauschildt ◽  
Andreas Stark ◽  
Hilmar Burmester ◽  
Ursula Tietze ◽  
Norbert Schell ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Materials Science ◽  
Transient Liquid Phase ◽  
High Energy ◽  
Transient Liquid Phase Bonding ◽  
X Ray Diffraction ◽  
Energy Materials ◽  
Joint Region ◽  
X Ray

TiAl alloys are increasingly used as a lightweight material, for example in aero engines, which also leads to the requirement for suitable repair techniques. Transient liquid phase bonding is a promising method for the closure of cracks (in non-critical or non-highly loaded areas). The brazing solder Ti-24Ni was investigated for brazing the alloy Ti-45Al-5Nb-0.2B-0.2C (in at. %). After brazing, the joint exhibits different microstructures and phase compositions. The transient liquid phase bonding process was investigated in the middle of the joint region in situ to acquire time resolved information of the phases, their development, and thus the brazing process. These investigations were performed using high-energy X-ray diffraction at the “High-Energy Materials Science” beamline HEMS, located at the synchrotron radiation facility PETRA III at DESY in Hamburg, Germany. For this, we used an induction furnace, which is briefly described here. During the analysis of the diffraction data with Rietveld refinement, the amount of liquid was refined with Gaussian peaks and thus could be quantified. Furthermore, while brazing four different phases occurred in the middle of the joint region over time. Additionally, the degree of ordering of the βo phase was determined with two ideal stoichiometric phases (completely ordered and disordered). Altogether, the phase composition changed clearly over the first six hours of the brazing process.

Electrochemical Deposition of Addressable N-Heterocyclic Carbene Monolayers

2020 ◽  
Author(s):  
Einav Amit ◽  
Shahar Dery ◽  
Suhong Kim ◽  
Anirban Roy ◽  
Qichi Hu ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Electrochemical Deposition ◽  
Deposition Process ◽  
Spatial Proximity ◽  
Liquid Phase Deposition ◽  
Surface Anchoring ◽  
Dry Conditions ◽  
In Situ Formation ◽  
Temporal And Spatial

<div>Herein, we introduce an electrochemical based approach for surface-anchoring of N-heterocyclic carbene (NHC) monolayers. The deposition process is based on in-situ formation of hydroxide ions by water reduction under negative potential. The hydroxide ions function as a base for deprotonation of the imidazole cations for the formation of active carbenes that self-assemble on the electrode's surface. Therefore, the electrochemical deposition does not require dry conditions or the addition of external base for carbene activation. The high temporal and spatial proximity between the NHC's activation and surface anchoring enabled the formation of well-ordered monolayers of NHCs on Au surfaces with higher density and stability than those achieved using liquid-phase deposition.</div>

In situ formation of two amorphous phases by liquid phase separation in Y–Ti–Al–Co alloy

2004 ◽  
Vol 85 (26) ◽  
pp. 6353-6355 ◽  
Author(s):  
B. J. Park ◽  
H. J. Chang ◽  
D. H. Kim ◽  
W. T. Kim
Keyword(s):  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Amorphous Phases ◽  
In Situ Formation
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