The Cu-15Ni-8Sn alloy ingot was prepared in the medium-frequency induction melting furnace. The hot extruded alloy was treated by solid solution at 840 °C for 60 min and aging at 400 °C for different times. ...
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The microstructure and shape memory effects (recovery strain, recovery stress, transformation temperatures) of hot-forged Ni47Ti50Fe3 shape memory alloy (SMA) before and after heat treatment with different heating tem...
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To date, there are two popular mechanisms regarding the piezocatalysis, i.e., the piezoelectric effect and the energy band theory. However, both mechanisms cannot fully explain the piezocatalytic process: the electron...
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The investigation evaluated the thermal shock resistance and failure mechanisms of three brazed joints when exposed to 780 °C. During exposure, oxidation of the SiC f /SiC composite leads to the formation of...
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The investigation evaluated the thermal shock resistance and failure mechanisms of three brazed joints when exposed to 780 °C. During exposure, oxidation of the SiC f /SiC composite leads to the formation of SiO 2 . Residual oxygen will penetrate the high-entropy alloy while retaining its Face-Centered Cubic (FCC) structure. Additionally, the FCC Cr 23 C 6 phase adjacent to the composite reacted with SiC, producing hexagonal Cr 2 C, compromising the ability of joint to withstand plastic deformation. Moreover, the presence of Nb (s, s) and significant MoNiSi phases induced a gradual alteration in the Coefficient of Thermal Expansion (CTE), facilitating the initiation of shear fractures from the composites towards the central region of the seam, significantly affecting the overall structural integrity and failure behavior of the joint under thermal shock conditions. With an increase in the number of thermal shocks, the shear strength of joint gradually decreases, reaching a maximum of 22.36 MPa after 30 thermal shocks, surpassing that of some joints using glass fillers.
Marine corrosion has been a global problem with the damage on environment, and economy. With the development, traditional coating technology is difficult to meet the current demands of applications. In this study, TiO...
Marine corrosion has been a global problem with the damage on environment, and economy. With the development, traditional coating technology is difficult to meet the current demands of applications. In this study, TiO 2 nanoparticles were modified and dispersed in silicone oil to form TiO 2 nanofluid. And, the nanofluid was infused into hierarchical structure to produce the SLIPS which is obtained by spraying with the solution of Al 2 O 3 , which significantly reduce the lubricant leaching. As synthesized coating shows the good performance in corrosion resistance. The coating prepared by this novel method show the great potential applications in different marine environments.
Carbon dots have unique advantages in biological applications owing to their excellent optical prope ***,the biosafety evaluation of carbon dots has limitations owing to cytotoxicity in vitro,and the re is little pre-...
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Carbon dots have unique advantages in biological applications owing to their excellent optical prope ***,the biosafety evaluation of carbon dots has limitations owing to cytotoxicity in vitro,and the re is little pre-safety evaluation before in vivo and clinical *** the carbon dots are or not suitable for applications in vivo,evaluation analysis can be made based on hemolysis and changes in erythrocyte *** this work,a green fluorescent N,S-doped carbon dots(N,S-CDs)were obtained by hydrothermal method,tobias acid,and m-phenylenediamine as precursors.N,S-CDs not only possessed excellent dispersibility,uniform particle size,high quantum yield(37.2%)and stable photoluminescence property but also retain their photostability and stro ng fluorescence intensity in the acid/alkaline solutions,different ionic strengths(NaCl)and under 365 nm UV *** r,the N,S-CDs displayed low cytotoxicity and high cellular uptake efficiency in human umbilical vein endothelial cells(HUVEC)and excellent blood compatibility to the *** is foreseeable that N,S-CDs could be further studied as a promising biological imaging agent in vivo.
The Brillouin gain characteristics were demonstrated in two low-loss chalcogenide waveguides. Compared with the Brillouin gain coefficient of 202 m-1W-1 in the As-S spiral waveguide, the gain performance of the Ge-As-...
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