Tin Doping in High-T c Superconductor YBa2Cu3O7−y

Muraki, Tatsuya; Mukasa, K.

doi:10.1007/978-4-431-68195-3_21

Cited by 5 publications

(8 citation statements)

References 14 publications

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“…21 among stress-rupture curves of three ferritic steels: 9Cr-1.8W-0.4Mo-VNb steel (0.16V, 0.06Nb, 0.11C and 0.036N) with W and MX, 31) 9Cr-1Mo-VNb steel (0.22V, 0.09Nb, 0.10C and 0.051N) with MX but without W, 36) and 9Cr-2W steel (0.08C) with W but without MX particles. 73) Although the 9Cr-1Mo-VNb steel contains the larger amounts of V, Nb and N than the 9Cr-1.8W-0.4Mo-VNb steel, the former is inferior to the latter in creep rupture strength because of the absence of W. However, the rupture lives of 9Cr-2W steel is substantially shorter than those of the 9Cr-1Mo-VNb steel in spite of W addition. The important role of the MX particles is obvious, but their strengthening mechanism has not been solved in detail.…”

Section: Particlesmentioning

confidence: 84%

Advances in Physical Metallurgy and Processing of Steels. Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel.

2001

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The creep deformation resistance and rupture life of high Cr ferritic steel with a tempered martensitic lath structure are critically reviewed on the basis of experimental data. Special attention is directed to the following three subjects: creep mechanism of the ferritic steel, its alloy design for further strengthening, and loss of its creep rupture strength after long-term use.The high Cr ferritic steel is characterized by its fine subgrain structure with a high density of free dislocations within the subgrains. The dislocation substructure is the most densely distributed obstacle to dislocation motion in the steel. Its recovery controls creep rate and rupture life at elevated temperatures. Improvement of creep strength of the steel requires a fine subgrain structure with a high density of free dislocations. A sufficient number of pinning particles (MX particles in subgrain interior and M 23 C 6 particles on sub-boundaries) are necessary to cancel a large driving force for recovery due to the high dislocation density. Coarsening and agglomeration of the pinning particles have to be delayed by an appropriate alloy design of the steel.Creep rupture strength of the high Cr ferritic steel decreases quickly after long-term use. A significant improvement of creep rupture strength can be achieved if we can prevent the loss of rupture strength. In the steel tempered at high temperature, enhanced recovery of the subgrain structure along grain boundaries is the cause of the premature failure and the consequent loss of rupture strength. However, the scenario is not always applicable. Further studies are needed to solve this important problem of high Cr ferritic steel. MX particles are necessary to retain a fine subgrain structure and to achieve the excellent creep strength of the high Cr ferritic steel. Strengthening mechanism of the MX particles is another important problem left unsolved.KEY WORDS: steel for elevated temperature service; creep; strengthening mechanism; alloy design; microstructure; microstructural degradation.

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Section: Particlesmentioning

confidence: 84%

Advances in Physical Metallurgy and Processing of Steels. Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel.

2001

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“…In tire application, tan δ values at 0°C and 60°C are usually used to predict WG and RR, respectively . The higher the tan δ at 0°C, the better the WG of vulcanizates.…”

Section: Resultsmentioning

confidence: 99%

“…In tire application, tan d values at 08C and 608C are usually used to predict WG and RR, respectively. 2,7,8 The higher the tan d at 08C, the better the WG of vulcanizates. The lower the tan d at 608C, the lower the RR of vulcanizates.…”

Section: Compound and Vulcanizate Propertiesmentioning

confidence: 99%

“…Apart from tread pattern, tire performance depends strongly on tire tread properties . Generally, tire performance is evaluated based on three main properties namely “the magic triangle”, i.e., fuel efficiency related to the rolling resistance (RR), wet grip (WG) corresponding to an efficiency of car control and breaking performance on a wet road, and wear resistance.…”

Section: Introductionmentioning

confidence: 99%

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Effects of silanization temperature and silica type on properties of silica‐filled solution styrene butadiene rubber (SSBR) for passenger car tire tread compounds

Thaptong

Sae‐Oui

Sirisinha

2016

J of Applied Polymer Sci

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Influence of silanization temperature on properties of silica‐filled solution polymerized styrene butadiene rubber was investigated. Two types of silica, i.e., highly dispersible silica (HDSi) and conventional silica (CSi), were compared. Results show that the increased silanization temperature leads to the enhanced rubber–filler interaction, filler dispersion, and cross‐link density giving rise to the improvement in vulcanizate properties such as modulus, heat build‐up (HBU), and dynamic set, as well as tire performance, e.g., wet grip (WG), rolling resistance (RR), and abrasion resistance. Great care, however, must be taken to avoid the scorching phenomenon during the mixing process at too high temperature. Taken as a whole, the balanced properties are found at the silanization temperature of 140°C. Surprisingly, HDSi provides insignificant differences in degree of filler dispersion, WG, and RR, compared to CSi, despite its claimed greater dispersability. Probably, the relatively long mixing time used in this experiment may override the influence of silica type. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43342.

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“…Assuming that the SAγ flux is produced by hadronic processes, the solar neutron flux recorded by the Fermi-LAT should be similar to the gamma-ray flux (see e.g., SSG1991). Solar neutrons have, in fact, been observed by Earth-bound observatories and correlated with gamma-ray emission during solar flares [51,52].…”

Section: Hypothesis Iii: Solar Neutronsmentioning

confidence: 99%

Unexpected dip in the solar gamma-ray spectrum

Tang

Linden

et al. 2018

Phys. Rev. D

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The solar disk is a bright source of multi-GeV gamma rays, due to the interactions of hadronic cosmic rays with the solar atmosphere. However, the underlying production mechanism is not understood, except that its efficiency must be greatly enhanced by magnetic fields that redirect some cosmic rays from ingoing to outgoing before they interact. To elucidate the nature of this emission, we perform a new analysis of solar atmospheric gamma rays with 9 years of Fermi-LAT data, which spans nearly the full 11-year solar cycle. We detect significant gamma-ray emission from the solar disk from 1 GeV up to 200 GeV. The overall gamma-ray spectrum is much harder (∼ E −2.2 γ ) than the cosmic-ray spectrum (∼ E −2.7 CR ). We find a clear anticorrelation between the solar cycle phase and the gamma-ray flux between 1-10 GeV. Surprisingly, we observe a spectral dip between ∼30-50 GeV in an otherwise power-law spectrum. This was not predicted, is not understood, and may provide crucial clues to the gamma-ray emission mechanism. The flux above 100 GeV, which is brightest during the solar minimum, poses exciting opportunities for HAWC, LHAASO, IceCube, and KM3NeT.

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Tin Doping in High-T c Superconductor YBa2Cu3O7−y

Cited by 5 publications

References 14 publications

Advances in Physical Metallurgy and Processing of Steels. Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel.

Advances in Physical Metallurgy and Processing of Steels. Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel.

Effects of silanization temperature and silica type on properties of silica‐filled solution styrene butadiene rubber (SSBR) for passenger car tire tread compounds

Unexpected dip in the solar gamma-ray spectrum

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