Ab Initio Calculation and Study of Luminescence Properties of SrTiO3:Pr³+ Materials Codoped with Metal Ions
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Study on the thermal stability of aluminum nanostructure
Al nano-particles were prepared by a dry roller vibration milling at room temperature, and the particles size milled 4 hour was the range between 50 and 80nm. The products were annealed 2 hour in the extent of 100°C-330°C. By XRD and DSC testing, we study the effect heat treatment temperature on Al particles size and…
Synthesis of metal hydride alloys using autonomous metal hydride actuator for seawater exchange in Hakodate port
In this study, indoor experiments were carried out with a model A-MHA system to investigate hydrogen storage capacity of hydrogen storage alloys. The performance of MmNi 4.16 Mn 0.24 Co 0.5 Al 0.1 alloy at 0.3 MPa was same as that of LaNi 5 alloy. As hydrogen pressure increased, the hydrogen storage capacity of MmNi 4…
Influence of drawing on the properties of bimetallic wire (Carbon Steel + 12X18H10T steel)
Bimetallic wire (carbon steel + 12X18H10T steel) is obtained by rolling and subsequent drawing of a composite blank. The change in strength of the wire on drawing is investigated. The relation between the wire strength and the strain is a power law.
Fatigue Performance of Corroded RC Beams Strengthened with CFRP Sheets
The paper presents the results of an experimental study on fatigue performance of corroded reinforced concrete (RC) beams repaired with carbon fiber reinforced polymer (CFRP) sheets. Five beams were constructed. One specimen was strengthened and not corroded; another four specimens were corroded and was strengthened w…
The influence of the high-temperature coolant purification system at nuclear power stations equipped with VVER-1000 reactors on the formation of dose burdens
It is shown that the effectiveness of using high-temperature filters for purifying the coolant at nuclear power stations equipped with VVER-1000 reactors is mainly determined by the precipitation constant of activated corrosion products dispersed in the coolant.
Values of adsorption and surface concentrations of the components in Na-K-Cs alloys
The values of adsorption Γ () and surface concentration X ω of all the components in alloys of the Na-K-Cs system were determined. The adsorption of cesium Γ Cs () was found to be > 0, while that for sodium Γ Na () was < 0 in all ternary alloys. The adsorption of potassium was found to undergo inversion when passing f…
Electrochemical properties of Fe-Ni-Zr active cathodes processed by VIM technique for hydrogen evolution in chlor-alkali electrolysis
The Fe-Ni-Zr active cathodes have been successfully prepared by vacuum induction melting (VIM) technique and used to be active cathodes in chlor-alkali industry for the first time. The alloys are found to be dendritic structure, and Zirconium content has significant impact on the polarization characteristics of the Fe…
Experiment and Mechanism Study on Effect of Water/Binder and Fly Ash on Mechanical Properties of HPC
It takes on the technical and economic double benefits that fly ash taking the place of cement. However, water/binder of modern concrete is generally low; the research on the concrete performance which is based on large water/binder is no longer suitable for analysis of modern concrete. As to this problem, using diffe…
Field Plate Load Tests on Dredged Sediment Dump Pond with Cement Solidified Crust Above
In order to improve the bearing capacity of dredged sediment dump pond for succeeding foundation reinforcement construction, upper layer was placed with a layer of cement solidified crust (CSC). For the special double layer foundation, field plate load tests were conducted to study the behaviors of failure mode, defor…
Extraction and characterization of collagen from the eel Bone
Eel bones as raw material, the use of enzyme and acid extraction of pepsin-soluble collagen (PSC), and its physical and chemical properties were determined. The results showed that the thermal denaturation temperature of the pepsin-soluble collagen (PSC) is 25 °C; shrinkage temperature is 57.94 °C, UV absorption value…
Utilization of Desulfuration Residues in Non-Autoclaved Aerated Concrete
Desulfuration residues were used as aggregate to produce Non-autoclaved aerated concrete. The effects of water-hinder ratio, casting temperature on the gas forming behavior, and those of desulfuration residue content on the compressive strength and bulk density of aerated concrete were investigated. The types of the h…
Power control of a combined system with fuel cell and supercapacitor
This paper deals with a combined system with fuel cell and supercapacitor to provide a power to grid or electrical load. The supercapacitor is used to compensate the slow response of the fuel cell at the instant of abrupt load change. The operation of the bidirectional DC/DC converter for a supercapacitor during charg…
Broadband and strong coupling metamaterial-based cavity resonator using artificial magnetic surfaces
This study proposes a novel metamaterial-based cavity with a strong coupling effect between the transmitting and receiving devices. It is compact in size and the field distribution is uniform inside the cavity, which is realized by combining four artificial magnetic conductor surfaces at the four sidewalls and two met…
Mechanical characterization of nickel nanowires by using a customized atomic microscope in scanning electron microscope
A new experimental method to characterize the mechanical properties of metallic nanowires is introduced. An accurate and fast mechanical characterization of nanowires requires simultaneous imaging and testing of the nanowires. However, existing mechanical characterization techniques fail to accomplish this goal due ei…
Magnetooptics and magnetic ordering in ferrite nanoparticles in glass doped with iron and rare-earth elements
Magnetic circular dichroism and X-ray diffraction were used to investigate the structure and magnetooptical properties of nanoparticles formed in potassium-aluminum-germanium-boron glass doped with iron and rare-earth elements. It is demonstrated that in thermally processed glass, the main magnetic phase of the formed…
Study on Corrosion Mechanism of Arc Sprayed Zn-Al-Mg Coatings by XRD and EIS
Cored wires and arc spraying were used to produce high Mg content Zn-Al-Mg alloy coatings on low carbon steel substrates. And the corrosion mechanism of the Zn-Al-Mg coatings was investigated comparing with Zn-Al alloy coatings by X-ray diffractometer (XRD) and Electrochemical impedance spectroscopy (EIS). The results…
Influence of60Co gamma radiation on fluorine plasma treated enhancement-mode high-electron-mobility transistor
AlGaN/GaN depletion-mode high-electron-mobility transistor (D-HEMT) and fluorine (F) plasma treated enhancement-mode high-electron-mobility transistor (E-HEMT) are exposed to 60 Co gamma radiation with a dose of 1.6 Mrad (Si). No degradation is observed in the performance of D-HEMT. However, the maximum transconductan…
Mechanical alloying of the Mo-rich Mo-O-Fe ternary system
Using X-ray diffraction, Mössbauer spectroscopy, and Auger spectrometry, it has been established that oxygen affects the sequence of solid-state reactions upon mechanical alloying of two types of powders mixtures consisting of an Mo/O composite and Fe with the elemental (atomic) ratios 74.4: 6.7: 18.9 (type 1) and 70.…
Ways of providing fire safety of aviation materials
Influence of various fire-retardant additives, as well as thermostability and chemical structure on polymer flammability is analyzed, and nonfire-resistant and fire-resistant polymer materials are compared. An essential influence of these factors on flammability, smoke density, heat release rate, and limit oxygen inde…