To improve the wettability of hypereutectic Al−60Si alloy and enhance the mechanical properties of the joints,Al−60Si alloy was joined by ultrasonic soldering with Sn-9Zn solder,and a sound joint with in-situ Si parti...
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To improve the wettability of hypereutectic Al−60Si alloy and enhance the mechanical properties of the joints,Al−60Si alloy was joined by ultrasonic soldering with Sn-9Zn solder,and a sound joint with in-situ Si particle reinforcement was *** oxide film of Al−60Si alloy at the interface was identified by transmission electron microscopy(TEM)analysis as amorphous Al_(2)O_(3).The oxide of Si particles in the base metal was also *** oxide film of Al−60Si alloy was observed to be removed by ultrasonic vibration instead of holding *** particle-reinforced joints(35.7 vol.%)were obtained by increasing the ultrasonication *** maximum shear strength peaked at 99.5 MPa for soldering at 330℃with an ultrasonic vibration time of 50 s.A model of forming of Si particles reinforced joint under the ultrasound was proposed,and ultrasonic vibration was considered to promote the dissolution of Al and migration of Si particles.
This study aims to enhance the photocatalytic performance of 2D/2D heterojunctions for NO removal from marine vessel ***_(2)/g-C_(3)N_(4) composites were successfully constructed via a facile solvothermal method,demon...
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This study aims to enhance the photocatalytic performance of 2D/2D heterojunctions for NO removal from marine vessel ***_(2)/g-C_(3)N_(4) composites were successfully constructed via a facile solvothermal method,demonstrating a significant improvement in photocatalytic NO removal under visible light *** high-flux simulated flue gas,the composite with 10%SnS_(2)(denoted as SNCN-10)showed exceptional NO removal efficiency,reaching up to 66.8%,along with excellent reusability over five consecutive *** band structure and density of states(DOS)calculations confirmed the formation of a characteristic ***-trapping ESR spectroscopy identified·O_(2)^(-)−as the key reactive species driving NO ***,in situ DRIFT spectroscopy revealed that SNCN-10 facilitated the conversion of NO to nitrate through intermediate species,including bridging nitrite and cis-nitrite(N_(2)O_(2)^(2-)).Kinetic studies further indicated that NO oxidation followed the Langmuir-Hinshelwood(L-H)*** on density functional theory(DFT)calculations of free energy changes,a comprehensive reaction pathway for NO oxidation was *** findings provide valuable insights for the development of efficient photocatalytic strategies for NO removal.
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