Improving Thermal Stability of LiMn[sub 2]O[sub 4] Thin Films by In Situ Coating of α-MnO[sub 2] Using High-Pressure and High-Temperature Sputtering

2004 ◽  
Vol 7 (8) ◽  
pp. A235 ◽  
Author(s):  
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Gin-Shiang Chen ◽  
H. H. Hsiao ◽  
R. F. Louh ◽  
C. J. Humphreys
2021 ◽  
Vol 130 (13) ◽  
pp. 135104
Author(s):  
Juwei Wang ◽  
Haihua Chen ◽  
Zhengang Zhang ◽  
Bin Wang ◽  
Hongtao Ma ◽  
...  

2013 ◽  
Vol 579 ◽  
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Xin Cai ◽  
Hongwei Liang ◽  
Yuanda Liu ◽  
Rensheng Shen ◽  
Xiaochuan Xia ◽  
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2010 ◽  
Vol 204 (12-13) ◽  
pp. 1989-1992 ◽  
Author(s):  
V. Dolique ◽  
A.-L. Thomann ◽  
P. Brault ◽  
Y. Tessier ◽  
P. Gillon

2018 ◽  
Vol 383 ◽  
pp. 118-124 ◽  
Author(s):  
E.N. Popova ◽  
I.L. Deryagina ◽  
E.G. Valova-Zaharevskaya ◽  
Alexey V. Stolbovsky

The structure and thermal stability of Cu-18Nb multicore composite fabricated by repeated cold-drawing of in situ melted mixture of Cu and Nb and subjected to high-pressure torsion (HPT) have been studied by SEM, TEM, X-ray analysis and microhardness measurements. In the cold-drawn state ribbon-like Nb filaments the thickness of 30-70 nm are located in Cu-matrix with sharp texture <110>Nb║<111>Cu║drawing axis. The Nb lattice is distorted, the interplanar spacing (110)Nb being extended along the drawing axis and compressed perpendicular to it, which testifies a semi-coherent character of Cu/Nb interfaces. At annealing these distorsions gradually vanish, and coagulation of Nb ribbons starts at 400С, actively develops at 600С and finishes at 800С with the formation of sausage-like filaments with round transverse sections, which is accompanied with about two-fold decreasing of microhardness. Under the HPT the composite structure is considerably refined, and almost equiaxed grains the sizes of 20-30 nm are formed, which gives rise to a dramatic increase of microhardness. The thermal stability of Cu-Nb composite after cold drawing and HPT is appreciably higher than that of pure Nb and Cu nanostructured by severe plastic deformation.


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