Thermal stability of nanocrystalline nickel with yttrium additions

2013 ◽  
Vol 28 (13) ◽  
pp. 1813-1819 ◽  
Author(s):  
K.A. Darling ◽  
L.J. Kecskes ◽  
M. Atwater ◽  
J. Semones ◽  
R.O. Scattergood ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Nanocrystalline Nickel ◽  
Image Position ◽  
Thermal Stability Of

Grain Growth in Nanocrystalline Nickel

1999 ◽  
Vol 580 ◽  
Author(s):  
G.D. Hibbard ◽  
U. Erb ◽  
K.T. Aust ◽  
G. Palumbo
Keyword(s):  
Thermal Stability ◽  
Grain Size ◽  
Grain Growth ◽  
Size Distributions ◽  
Nanocrystalline Nickel ◽  
Scanning Calorimetry ◽  
Solute Content ◽  
Grain Size Distributions ◽  
Thermal Stability Of ◽  
Total Solute Content

AbstractIn this study, the effect of grain size distribution on the thermal stability of electrodeposited nanocrystalline nickel was investigated by pre-annealing material such that a limited amount of abnormal grain growth was introduced. This work was done in an effort to understand the previously reported, unexpected effect, of increasing thermal stability with decreasing grain size seen in some nanocrystalline systems. Pre-annealing produced a range of grain size distributions in materials with relatively unchanged crystallographic texture and total solute content. Subsequent thermal analysis of the pre-annealed samples by differential scanning calorimetry showed that the activation energy of further grain growth was unchanged from the as-deposited nanocrystalline nickel.

scholarly journals Improved Hardness and Thermal Stability of Nanocrystalline Nickel Electrodeposited with the Addition of Cysteine

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2254
Author(s):  
Tamás Kolonits ◽  
Zsolt Czigány ◽  
László Péter ◽  
Imre Bakonyi ◽  
Jenő Gubicza
Keyword(s):  
Thermal Stability ◽  
Grain Size ◽  
Dislocation Density ◽  
Nickel Sulfate ◽  
Fault Probability ◽  
Nanocrystalline Nickel ◽  
Twin Fault ◽  
Cysteine Content ◽  
Heating Up ◽  
Thermal Stability Of

Experiments were conducted for the study of the effect of cysteine addition on the microstructure of nanocrystalline Ni films electrodeposited from a nickel sulfate-based bath. Furthermore, the thermal stability of the nanostructure of Ni layers processed with cysteine addition was also investigated. It was found that with increasing cysteine content in the bath, the grain size decreased, while the dislocation density and the twin fault probability increased. Simultaneously, the hardness increased due to cysteine addition through various effects. Saturation in the microstructure and hardness was achieved at cysteine contents of 0.3–0.4 g/L. Moreover, the texture changed from (220) to (200) with increasing the concentration of cysteine. The hardness of the Ni films processed with the addition of 0.4 g/L cysteine (∼6800 MPa) was higher than the values obtained for other additives in the literature (<6000 MPa). This hardness was further enhanced to ∼8400 MPa when the Ni film was heated up to 500 K. It was revealed that the hardness remained as high as 6000 MPa even after heating up to 750 K, while for other additives, the hardness decreased below 3000 MPa at the same temperature.

Thermal stability of the nanostructure of mechanically milled Cu–5 vol% Al2O3 nanocomposite powder particles

2014 ◽  
Vol 29 (8) ◽  
pp. 996-1005 ◽  
Author(s):  
Dengshan Zhou ◽  
Deliang Zhang ◽  
Charlie Kong ◽  
Paul Munroe ◽  
Rob Torrens
Keyword(s):  
Thermal Stability ◽  
Nanocomposite Powder ◽  
Powder Particles ◽  
Image Position ◽  
Thermal Stability Of

Abstract

Thermal stability of highly nanotwinned copper: The role of grain boundaries and texture

2012 ◽  
Vol 27 (24) ◽  
pp. 3049-3057 ◽  
Author(s):  
Yifu Zhao ◽  
Timothy Allen Furnish ◽  
Michael Ernest Kassner ◽  
Andrea Maria Hodge
Keyword(s):  
Thermal Stability ◽  
Grain Boundaries ◽  
Image Position ◽  
Thermal Stability Of

Abstract

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