Si effect on structure transformations in air-heated Al-Cr powder preforms

2020 ◽  
Author(s):  
G. A. Pribytkov ◽  
V. V. Korzhova ◽  
E. N. Korosteleva
Keyword(s):  
Si Effect

scholarly journals Solidification Pattern of Si-Alloyed, Inoculated Ductile Cast Irons, Evaluated by Thermal Analysis

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 846
Author(s):  
Iuliana Stan ◽  
Denisa Anca ◽  
Stelian Stan ◽  
Iulian Riposan
Keyword(s):  
Cast Iron ◽  
Eutectic Reaction ◽  
Influencing Factor ◽  
Cooling Curve ◽  
Major Influence ◽  
Cast Irons ◽  
Minor Elements ◽  
Si Content ◽  
Si Effect ◽  
Positive Effect

The solidification cooling curve itself as well as its first derivative, and related temperatures, reported to the calculated equilibrium temperatures in stable and metastable solidification systems, are used to predict the solidification characteristics of the cast iron. Silicon, as the most representative cast iron element, and inoculation, as graphitizing metallurgical treatment, have a major influence on the transition from the liquid to the solid state. Six experimental programs are performed, with Si content typically for non-alloyed (<3.0% Si), low (3.0–3.5% Si) and medium alloyed (4.5–5.5% Si) ductile cast irons, as Si-content increasing, and inoculation simultaneous effects. Silicon is an important influencing factor, but the base and minor elements also affect the equilibrium eutectic temperatures, much more in the Fe-C-Si-Xi stable system (15–20 °C) than in the metastable system (5–10 °C), comparing with their calculation based only on a Si effect (Fe-C-Si system). The highest positive effect of inoculation is visible in non-Si alloyed cast irons (2.5% Si): 9–15 °C for the eutectic reaction and 3 to 4 times increased at the end of solidification (37–47 °C). Increased Si content decreases inoculation power to 7–9 °C for low alloying grade (up to 3.5% Si), with the lowest contribution at more than 4.5% Si (0.3–2.0 °C). 2.5–3.5% Si ductile cast irons are more sensitive to high solidification undercooling, especially at the end of solidification (but with a higher efficiency of inoculation), compared to 4.5–5.5% Si ductile cast irons, at a lower undercooling level, and at lower inoculation contribution, as well.

Interfaces in Si/Ge atomic layer superlattices on (001)Si: Effect of growth temperature and wafer misorientation

1996 ◽  
Vol 80 (3) ◽  
pp. 1450-1459 ◽  
Author(s):  
J.‐M. Baribeau ◽  
D. J. Lockwood ◽  
R. W. G. Syme
Keyword(s):  
Growth Temperature ◽  
Atomic Layer ◽  
Si Effect

scholarly journals Strain Dependence of Hysteretic Giant Magnetoimpedance Effect in Co-Based Amorphous Ribbon

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2110 ◽  
Author(s):  
Michał Nowicki ◽  
Piotr Gazda ◽  
Roman Szewczyk ◽  
Andriy Marusenkov ◽  
Anton Nosenko ◽  
...  
Keyword(s):  
Amorphous Ribbon ◽  
Strain Gauges ◽  
Gauge Factor ◽  
Giant Magnetoimpedance ◽  
Giant Magnetoimpedance Effect ◽  
Strain Dependence ◽  
Si Effect ◽  
Magnetizing Field ◽  
Field Influence ◽  
Semiconductor Strain

The significant strain dependence of the hysteretic Giant Magnetoimpedance (GMI) effect in a Co67Fe3Cr3B12Si15 amorphous alloy in a low magnetizing field is presented. A simplistic test stand capable of continuous measurements of GMI characteristics under the influence of strain is detailed. Based on the results, a stress-impedance (SI) sensor is proposed, with a gauge factor similar to semiconductor strain gauges but more robust. An effective method of minimizing external magnetic field influence on the SI effect is given.

Photoluminescence from Si: Effect of ripple microstructures induced by argon ion irradiation

2009 ◽  
Vol 203 (17-18) ◽  
pp. 2690-2693 ◽  
Author(s):  
T.K. Chini ◽  
D.P. Datta ◽  
U. Luchhesi ◽  
A. Mücklich
Keyword(s):  
Ion Irradiation ◽  
Argon Ion ◽  
Si Effect

scholarly journals Bond-specific reaction kinetics during the oxidation of (111) Si: Effect of n-type doping

2011 ◽  
Vol 98 (2) ◽  
pp. 021904 ◽  
Author(s):  
B. Gokce ◽  
D. E. Aspnes ◽  
G. Lucovsky ◽  
K. Gundogdu
Keyword(s):  
Reaction Kinetics ◽  
Specific Reaction ◽  
Si Effect

TL glow curve shape and response of LiF:Mg,Cu,Si—Effect of heating rate

2008 ◽  
Vol 43 (2-6) ◽  
pp. 361-364 ◽  
Author(s):  
A.S. Pradhan ◽  
J.I. Lee ◽  
J.L. Kim ◽  
K.S. Chung ◽  
H.S. Choe ◽  
...  
Keyword(s):  
Heating Rate ◽  
Glow Curve ◽  
Curve Shape ◽  
Si Effect

scholarly journals Silicon Use in the Integrated Disease Management of Wheat: Current Knowledge

2020 ◽  
Author(s):  
Leandro José Dallagnol ◽  
Andrea Elizabeth Román Ramos ◽  
Keilor da Rosa Dorneles
Keyword(s):  
Disease Management ◽  
Defense Mechanisms ◽  
Higher Plants ◽  
Current Knowledge ◽  
Wheat Plant ◽  
Integrated Disease Management ◽  
Simple Task ◽  
Disease Management Strategy ◽  
Si Effect ◽  
Different Tissues

Silicon (Si) is a benefic element for higher plants such as wheat (Triticum aestivum) in which it is accumulated in the shoot tissues. In this crop, leaf diseases and spike diseases are the cause of yield losses, and therefore several studies had been conducted under field and greenhouse conditions to demonstrate that plants supplied with Si reduced most of the diseases damage due to the amelioration of the plant defenses. However, the benefits of Si depend on its accumulation in the plant’s tissue, which is influenced by the availability of the element in the soil as well as the up-take ability of the wheat cultivar. In this chapter we present the current knowledge about the mechanisms of Si absorption and its accumulation in different tissues of the wheat plant, the most studied options for silicate fertilization, and the benefits of Si on grain yield. We also present some insight of the effect of Si-supply in wheat on the reduction of main leaf and ear diseases, bringing evidence and explanation of the defense mechanisms involved. In addition, we provide an overview of the Si effect on the physiology (gas exchange, chlorophyll a fluorescence and carbohydrate metabolism) of the wheat plant. Finally, questions have been raised about the Si uses as fertilizer that still needs to be answered. We recognized that some studies have enhanced our understanding of Si providing evidence of the Si use as disease management strategy, but further research is needed to make the Si uses a simple task for wheat growers under field condition.

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