Size-Mismatch Effects in Alloys

1993 ◽  
pp. 141-159 ◽  
Author(s):  
M. F. Thorpe ◽  
S. D. Mahanti
Keyword(s):  
Size Mismatch

Cation-size mismatch and interface stabilization for efficient NiOx-based inverted perovskite solar cells with 21.9% efficiency

Nano Energy ◽  
2021 ◽  
pp. 106285
Author(s):  
Yousheng Wang ◽  
Hui Ju ◽  
Tahmineh Mahmoudi ◽  
Chong Liu ◽  
Cuiling Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Size Mismatch ◽  
Cation Size

Al-La-Ni-Fe Amorphous Alloys and Amorphous-Crystalline Composites Produced by Mechanical Alloying

2006 ◽  
Vol 510-511 ◽  
pp. 290-293 ◽  
Author(s):  
Pyuck Pa Choi ◽  
Ji Soon Kim ◽  
O.T.H. Nguyen ◽  
Dae Hwan Kwon ◽  
Young Soon Kwon
Keyword(s):  
Spherical Shape ◽  
High Energy ◽  
Size Mismatch ◽  
Atomic Size ◽  
Stage Crystallization ◽  
Dsc Analyses ◽  
Amorphous Powders ◽  
Compositional Changes ◽  
La Addition ◽  
Constituent Elements

Al-La-Ni-Fe alloys of three different compositions (Al82La10Ni4Fe4, Al85La9Ni3Fe3 and Al88La6Ni3Fe3) were prepared high-energy milling in a planetary ball-mill (AGO-2). Complete amorphization was observed for the Al82La10Ni4Fe4 alloy after milling for 350 h at a rotational speed of 300 rpm. In contrast, the Al85La9Ni3Fe3 and Al88La6Ni3Fe3 powders contained the FCC Al phase even for prolonged milling. The amorphization tendency was found to increase in the order of Al88La6Ni3Fe3 < Al85La9Ni3Fe3 < Al82La10Ni4Fe4, which may well be ascribed to the increasing atomic size mismatch of the constituent elements on La addition. DSC analyses of amorphous samples revealed two-stage crystallization processes for all three alloys, however, with strong variations in the thermal stability upon compositional changes. As observed by SEM, amorphous powders consisted of particles with nearly spherical shape and diameters ranging from 5 to 20 µm.

scholarly journals Impact of size mismatch induced quenched disorder on phase fluctuation and low field magnetotransport in polycrystalline Nd0.58−xGdxSr0.42MnO3

2010 ◽  
Vol 107 (9) ◽  
pp. 09D726 ◽  
Author(s):  
Manoj K. Srivastava ◽  
Ravikant Prasad ◽  
P. K. Siwach ◽  
M. P. Singh ◽  
H. K. Singh
Keyword(s):  
Phase Fluctuation ◽  
Quenched Disorder ◽  
Size Mismatch ◽  
Low Field

scholarly journals A Patient with Giant Left Atrium Undergoes Orthotopic Heart Transplantation

2014 ◽  
Vol 41 (1) ◽  
pp. 87-90 ◽  
Author(s):  
Sergey Y. Boldyrev ◽  
Murat K. Lepshokov ◽  
Igor I. Yakuba ◽  
Kirill O. Barbukhatty ◽  
Vladimir A. Porhanov
Keyword(s):  
Left Atrium ◽  
Left Atrial ◽  
Left Atrial Volume ◽  
Posterior Wall ◽  
Orthotopic Heart Transplantation ◽  
Mechanical Prosthesis ◽  
Size Mismatch ◽  
Giant Left Atrium ◽  
Left Atrial Posterior ◽  
Rheumatic Heart

We present a novel technique for resolving the problem of radical size mismatch at the time of orthotopic transplantation. A 48-year-old man presented with chronic rheumatic heart disease and a giant left atrium. Twenty-three years before, he had undergone mitral valve replacement with a mechanical prosthesis. At the time of the repeated intervention, the volume of his left atrium was 350 mL. Surgical features of the transplantation included approximation of the pulmonary vein ostia by gathering sutures intentionally, in order to decrease the area of the left atrial posterior wall and thereby enable appropriate coaptation with the donor left atrium. After the operation, left atrial volume had been reduced to 60 mL.

Body size mismatch between donor and recipient and the development of chronic rejection in renal transplantation

1997 ◽  
Vol 29 (1-2) ◽  
pp. 111 ◽  
Author(s):  
L.S. Lee ◽  
L.A. Auersvald ◽  
E.B. Claus ◽  
M.J. Bia ◽  
A.L. Friedman ◽  
...  
Keyword(s):  
Renal Transplantation ◽  
Body Size ◽  
Chronic Rejection ◽  
Size Mismatch

Various Anastomotic Techniques for Size Mismatch in Pulmonary Artery during Lung Implantation

2019 ◽  
Vol 38 (4) ◽  
pp. S419-S420
Author(s):  
Y. Yokoyama ◽  
T. Chen Yoshikawa ◽  
Y. Yamada ◽  
Y. Yutaka ◽  
D. Nakajima ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Size Mismatch ◽  
Anastomotic Techniques

scholarly journals Enhanced Magnetic Properties of Co-Doped BiFeO3 Thin Films via Structural Progression

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1798
Author(s):  
Liang Bai ◽  
Mingjie Sun ◽  
Wenjing Ma ◽  
Jinghai Yang ◽  
Junkai Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Sol Gel ◽  
Sem Images ◽  
Size Mismatch ◽  
Structural Progression ◽  
Gel Technique ◽  
Average Size ◽  
Perovskite Lattice ◽  
Co Doped

Co3+ doping in BiFeO3 is expected to be an effective method for improving its magnetic properties. In this work, pristine BiFeO3 (BFO) and doped BiFe1-xCoxO3 (BFCxO, x = 0.01, 0.03, 0.05, 0.07 and 0.10) composite thin films were successfully synthesized by a sol–gel technique. XRD and Raman spectra indicate that the Co3+ ions are substituted for the Fe3+ ion sites in the BFO rhombohedral lattice. Raman vibration of oxygen octahedron is obviously weakened due to the lattice distortion induced by the size mismatch between two B-site cations (Fe3+ and Co3+ ions), which has an impact on the magnetic properties of BFCxO. SEM images reveal a denser agglomeration in Co-doped samples. TEM results indicate that the average size of grains is reduced due to the Co3+ substitution. XPS measurements illustrate that the replacement of Fe3+ with Co3+ effectively suppresses the generation of oxygen defects and increases the concentration of Fe3+ ions at the B-site of perovskite lattice. Vibrating sample magnetometer (VSM) measurements show that the remanent magnetization (Mr) of BFC0.07O (3.6 emu/cm3) and the saturation magnetization (Ms) of BFC0.10O (48.84 emu/cm3) thin film both increase by approximately two times at room temperature, compared with that of the pure BFO counterpart.

Thermodynamics and Kinetics of Bulk Metallic Glass

MRS Bulletin ◽  
2007 ◽  
Vol 32 (8) ◽  
pp. 620-623 ◽  
Author(s):  
R. Busch ◽  
J. Schroers ◽  
W. H. Wang
Keyword(s):  
Metallic Glasses ◽  
Pure Metal ◽  
Glass Forming Ability ◽  
Kinetic Properties ◽  
Size Mismatch ◽  
Atomic Size ◽  
Glass Forming ◽  
Thermodynamics And Kinetics ◽  
Metal Melts ◽  
Kinetics Of

AbstractBulk metallic glasses (BMGs) are multicomponent alloys with typically three to five components with large atomic size mismatch and a composition close to a deep eutectic. Packing in BMG liquids is very dense, with a low content of free volume resulting in viscosities that are several orders of magnitude higher than in pure metal melts. The dense packing accomplished by structural and chemical atomic ordering also brings the BMG-forming liquid energetically and entropically closer to its corresponding crystalline state. These factors lead to slow crystallization kinetics and consequentially to high glass-forming ability. This article highlights the thermodynamic and kinetic properties of BMGs and their contributions to extraordinarily high glass-forming ability. Some possible links with mechanical properties are also suggested.

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