scholarly journals Grain Boundary Segregation and Interdiffusion Effects in Nickel–Copper Alloys: An Effective Means to Improve the Thermal Stability of Nanocrystalline Nickel

2011 ◽  
Vol 3 (7) ◽  
pp. 2265-2274 ◽  
Author(s):  
Eva Pellicer ◽  
Aïda Varea ◽  
Kartik M. Sivaraman ◽  
Salvador Pané ◽  
Santiago Suriñach ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Grain Boundary ◽  
Copper Alloys ◽  
Effective Means ◽  
Boundary Segregation ◽  
Grain Boundary Segregation ◽  
Nanocrystalline Nickel ◽  
Nickel Copper ◽  
Thermal Stability Of

scholarly journals The role of grain boundary character in solute segregation and thermal stability of nanocrystalline Pt–Au

Nanoscale ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 3552-3563
Author(s):  
Christopher M. Barr ◽  
Stephen M. Foiles ◽  
Malek Alkayyali ◽  
Yasir Mahmood ◽  
Patrick M. Price ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Grain Boundary ◽  
Boundary Segregation ◽  
Solute Drag ◽  
Solute Segregation ◽  
Grain Boundary Segregation ◽  
Grain Boundary Character ◽  
Service Conditions ◽  
Thermal Stability Of

In nanocrystalline alloys, the anisotropy in grain boundary segregation and its impact on dynamic solute drag plays a key role in the thermal stability of these systems during processing treatments or under service conditions.

scholarly journals On the thermal stability and grain boundary segregation in nanocrystalline PtAu alloys

Materialia ◽  
2019 ◽  
Vol 6 ◽  
pp. 100298 ◽  
Author(s):  
P. Lu ◽  
F. Abdeljawad ◽  
M. Rodriguez ◽  
M. Chandross ◽  
D.P. Adams ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Grain Boundary ◽  
Boundary Segregation ◽  
Grain Boundary Segregation

Grain boundary segregation in metals

1992 ◽  
Vol 50 (2) ◽  
pp. 1204-1205
Author(s):  
C.L. Briant
Keyword(s):  
Fracture Surface ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Material Properties ◽  
Electron Spectroscopy ◽  
High Vacuum ◽  
Boundary Segregation ◽  
Grain Boundary Segregation ◽  
Local Concentration ◽  
The One

Grain boundary segregation is the process by which solute elements in a material diffuse to the grain boundaries, become trapped there, and increase their local concentration at the boundary over that in the bulk. As a result of this process this local concentration of the segregant at the grain boundary can be many orders of magnitude greater than the bulk concentration of the segregant. The importance of this problem lies in the fact that grain boundary segregation can affect many material properties such as fracture, corrosion, and grain growth.One of the best ways to study grain boundary segregation is with Auger electron spectroscopy. This spectroscopy is an extremely surface sensitive technique. When it is used to study grain boundary segregation the sample must first be fractured intergranularly in the high vacuum spectrometer. This fracture surface is then the one that is analyzed. The development of scanning Auger spectrometers have allowed researchers to first image the fracture surface that is created and then to perform analyses on individual grain boundaries.

An atom probe tomography study of grain boundary segregation in nanocrystalline Ni-W

2005 ◽  
Vol 903 ◽  
Author(s):  
Andrew Detor ◽  
Michael K. Miller ◽  
Christopher A. Schuh
Keyword(s):  
Grain Boundary ◽  
Atom Probe Tomography ◽  
Boundary Segregation ◽  
Atom Probe ◽  
Solute Segregation ◽  
Grain Boundary Segregation ◽  
Distribution Analysis ◽  
Grain Sizes ◽  
Composition Fluctuations ◽  
20 Nm

AbstractAtom probe tomography is used to observe the solute distribution in electrodeposited nanocrystalline Ni-W alloys with three different grain sizes (3, 10, and 20 nm) and the results are compared with atomistic computer simulations. The presence of grain boundary segregation is confirmed by detailed analysis of composition fluctuations in both experimental and simulated structures, and its extent quantified by a frequency distribution analysis. In contrast to other nanocrystalline alloys, the present Ni-W alloys exhibit only a subtle amount of solute segregation to the intergranular regions. This finding is consistent with quantitative predictions for these alloys based upon a thermodynamic model of grain boundary segregation.

Increased Thermal Stability of Co-silicide Using Co-Ta Alloy Films

2001 ◽  
Vol 670 ◽  
Author(s):  
Min-Joo Kim ◽  
Hyo-Jick Choi ◽  
Dae-Hong Ko ◽  
Ja-Hum Ku ◽  
Siyoung Choi ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Grain Boundary ◽  
Reaction Rate ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
Alloy Films ◽  
Post Annealing ◽  
Alloy Process ◽  
Thermal Stability Of

ABSTRACTThe silicidation reactions and thermal stability of Co silicide formed from Co-Ta/Si systems have been investigated. In case of Co-Ta alloy process, the formation of low resistive CoSi2phase is delayed to about 660°C, as compared to conventional Co/Si system. Moreover, the presence of Ta in Co-Ta alloy films reduces the silicidation reaction rate, resulting in the strong preferential orientation in CoSi2 films. Upon high temperature post annealing in the furnace, the sheet resistance of Co-silicide formed from Co/Si systems increases significantly, while that of Co-Ta/Si systems maintains low. This is due to the formation of TaSi2 at the grain boundaries and surface of Co-silicide films, which prevents the grain boundary migration thereby slowing the agglomeration. Therefore, from our research, increased thermal stability of Co-silicide films was successfully obtained from Co-Ta alloy process.

scholarly journals Grain Boundary Segregation in UFG Alloys Processed by Severe Plastic Deformation

2012 ◽  
Vol 14 (11) ◽  
pp. 968-974 ◽  
Author(s):  
Xavier Sauvage ◽  
Artur Ganeev ◽  
Yulia Ivanisenko ◽  
Nariman Enikeev ◽  
Maxim Murashkin ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Grain Boundary ◽  
Severe Plastic Deformation ◽  
Boundary Segregation ◽  
Grain Boundary Segregation

Boron Grain Boundary Segregation in a Heat Treatable Steel

2015 ◽  
Vol 160 (5) ◽  
pp. 204-208 ◽  
Author(s):  
Phillip Haslberger ◽  
Christoph Turk ◽  
Katharina Babinsky ◽  
Devrim Caliskanoglu ◽  
Helmut Clemens ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Segregation ◽  
Grain Boundary Segregation
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