5篇
您的检索式：作者名="Fenglei Niu"
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| 1 | Water droplet impact on superhydrophobic surfaces with microstructures and hierarchical roughness显示文摘Quantitative correlation between the critical impact velocity of droplet and geometry of superhydrophobic surfaces with microstructures is systematically studied.Experimental data shows that the critical impact velocity induced wetting transition of droplet on the superhydrophobic surfaces is strongly determined by the perimeter of single micropillar,the space between the repeat pillars and the advancing contact angle of the sidewall of the micropillars.The proposed model agrees well with the experimental results,and clarifies that the underlying mechanism which is responsible for the superhydrophobic surface with hierarchical roughness could sustain a higher liquid pressure than the surfaces with microstructures. | HAO PengFei LV CunJing NIU FengLei YU Yu | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，7： | 11 |
| 2 | Effect of oxygen on fouling behavior in lead-bismuth coolant systems 显示文摘 | Fenglei Niu Robert Candalino Ning Li | 2007 | Journal of Nuclear Materials2007，366，： | 1 |
| 3 | Effect of oxygen on fouling behavior in lead-bismuth coolant systems 显示文摘 | Fenglei Niu Robert Candalino Ning Li | 2007 | Journal of Nuclear Materials2007，366，： | 1 |
| 4 | Achieving a high-strength dissimilar joint of T91 heat-resistant steel to 316L stainless steel via friction stir welding显示文摘The reliable welding of T91 heat-resistant steel to 316L stainless steel is a considerable issue for ensuring the safety in service of ultrasupercritical power generation unit and nuclear fusion reactor,but the high-quality dissimilar joint of these two steels was difficult to be obtained by traditional fusion welding methods.Here we improved the structure-property synergy in a dissimilar joint of T91 steel to 316L steel via friction stir welding.A defect-free joint with a large bonding interface was produced using a small-sized tool under a relatively high welding speed.The bonding interface was involved in a mixing zone with both mechanical mixing and metallurgical bonding.No obvious material softening was detected in the joint except a negligible hardness decline of only HV~10 in the heat-affected zone of the T91 steel side due to the formation of ferrite phase.The welded joint exhibited an excellent ultimate tensile strength as high as that of the 316L parent metal and a greatly enhanced yield strength on account of the dependable bonding and material renovation in the weld zone.This work recommends a promising technique for producing high-strength weldments of dissimilar nuclear steels. | Zhiwei Wang Min Zhang Cong Li Fenglei Niu Hao Zhang Peng Xue Dingrui Ni Bolv Xiao Zongyi Ma | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，1： | 0 |
| 5 | Wetting property of smooth and textured hydrophobic surfaces under condensation condition显示文摘Static and dynamic wetting behaviors of sessile droplet on smooth,microstructured and micro/nanostructured surface under condensation condition are systematically studied.In contrast to the conventional droplet wetting on such natural materials by dropping,we demonstrate here that when dropwise condensation occurs,the sessile droplet will transit from the Cassie-Baxter wetting state to the Wenzel wetting state or partial Cassie-Baxter wetting state on the microstructured surface or the micro/nanostructured surface,which leads to a strong adhesion between the droplet and the substrate.In contrast,the apparent contact angle and the sliding angle on the smooth surface changes a little before and after the condensation because of small roughness.Theoretical analysis shows that the roughness factor controls the adhesion force of the droplet during condensation,and a theoretical model is constructed which will be helpful for us to understand the relationship between the adhesion force and the geometry of the surface. | HAO PengFei LV CunJing YAO ZhaoHui NIU FengLei | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，11： | 0 |
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