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[en] In this paper, we summarize recent work on helium (He) interaction with various heterophase boundaries under high temperature irradiation. We categorize the ion-affected material beneath the He-implanted surface into three regions of depth, based on the He/vacancy ratio. The differing defect structures in these three regions lead to the distinct temperature sensitivity of He-induced microstructure evolution. The effect of He bubbles or voids on material mechanical performance is explored. Finally, overall design guidelines for developing materials where He-induced damage can be mitigated in materials are discussed.
[en] We argue that a more accurate analysis of the 'crucial experiments' considered by Zhao (2011 Phys. Scr. 83 038302) reveals that some of the conclusions in the paper are unconvincing and even misleading.
[en] When we use the strain gauge in the high temperature water, lowering of insulation resistance between test material and gauge is the matter. The lowering makes the measurement unstable and is the primary factor of an error. This study devises the waterproofing method in empirically that has the best insulating property in the hot water(100 .deg. C), In this way, we can reach the conclusion that on the condition of a few hours we can measure precisely in the high temperature like normal temperature
[en] The experimental model of a HT-SQUID fluxmeter has been developed. Its transducer is a Zimmerman type HT-SQUID. The instrument is an analog one, using the classical flux lock loop. A single printed board constructive solution has been preferred. The noise limited flux resolution is better than 10-2% when the time constant of the integrator is 0.22 s. (Author)
[en] Full text: Chiral 𝑝-wave superconductors are a highly desirable phase of matter because they support non-Abelian anyons. These quasiparticles are foundational to building a topological quantum computer. Chiral 𝑝-wave superconductors can be constructed using heterostructures based on conventional 𝑠-wave superconductors. These devices require very low temperatures and so we are motivated to find an alternative design based on high-temperature superconductors. Here we discuss several candidate systems involving proximity-induced high temperature superconductivity (such as iron-based (pnictide) or cuprate systems). (author)
[en] The power generation and chemical industry have been subjected to further material degradation with long term operations and need to predict the remaining service life of components, such as reformer tube and turbine rotor, that have operated at elevated temperatures. As a non-destructive technique, replication method with reliable metallurgical life and microstructural soundness assessment has been recognized with strongly useful method until now. Developments of this method have variously accomplished by new quantitative approach, such as carbide analysis, with A-parameter and grain deformation method. An overview of replication, some new techniques for material degradation and life assessment were introduced in this paper. Also, on-site applications and its reasonableness were described. As a result of having analyzed microstructure by replication method, carbide approach was quantitatively useful to life assessment
[en] On the basis of experimental data, a criterion is derived for determining the localization time of the deformation in plane samples under tension at high temperature. The time of uniform deformation of the sample is determined.
[en] Highlights: • The oxidation behavior of Cr and CrAl coatings on Zircaloy-2 has been characterized in high temperature steam. • CrAl coatings demonstrated three orders magnitude lower weight gain than uncoated Zircaloy-2 in 700 °C steam environment. • CrAl coatings with higher Al composition demonstrated lower weight gain in high temperature steam. • Dissolution of second phase particles occurs on the coated Zircaloy-2 during the high temperature steam exposure.