Ying Ruan

Northwestern Polytechnical University

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B. Wei

Northwestern Polytechnical University

Ruilin Xiao

Northwestern Polytechnical University

Liyuan Li

Northwestern Polytechnical University

Hui Li

Shandong University

Liang Hu

Hong Kong Polytechnic University

Dai Fu-Ping

Northwestern Polytechnical University

Yuhang Zheng

Northwestern Polytechnical University

Wei Bing-Bo

Northwestern Polytechnical University

Lishu Zhang

Forschungszentrum Jülich

Tao Li

Sanjiang University

Cooperative Institutions

Northwestern Polytechnical University

Chinese Academy of Sciences

Shandong University

Hunan Agricultural University

University of Chinese Academy of Sciences

University of Science and Technology of China

Tsinghua University

Harbin Institute of Technology

Fujian Electric Power Survey & Design Institute

Northwest Institute For Non-Ferrous Metal Research

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One-step fabrication of soft calcium superhydrophobic surfaces by a simple electrodeposition process

RSC Advances (2021)

Zhi Chen Hu Yongbo Xu He Yihao Xu Xuesong Liu

A simple, one-step electrodeposition process was rapidly performed on a metal substrate to fabricate calcium superhydrophobic surfaces in an electrolyte containing calcium chloride (CaCl2), myristic acid (CH3(CH2)12COOH), and ethanol, which can avoid the intricate post-processing of surface treatment. The morphology and surface chemical compositions of the fabricated superhydrophobic surfaces were systematically examined by means of SEM, XRD, and FTIR, respectively. The results indicate that the deposited surfaces were mainly composed of calcium myristate, which can dramatically lower surface free energy. The shortest process for constructing a superhydrophobic surface is about 0.5 min, and the maximum contact angle of the as-prepared surfaces can reach as high as 166°, showing excellent superhydrophobicity. By adjusting the electrodeposition time, the structure of the cathodic surface transforms from the turfgrass structure, loose flower structures, larger and dense flower structures, secondary flower structures, and then into tertiary or more flower structures. The superhydrophobic surfaces showed excellent rebound performance with a high-speed camera. After a pressing force, their hardness increases, but the superhydrophobic performance is not weakened. Inversely, the bouncing performance is enhanced. This electrodeposition process offers a promising approach for large areas of superhydrophobic surfaces on conductive metals and strongly impacts the dynamics of water droplets.

10.1039/d1ra06019h

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Citations (7)

Peri‐eutectic transition during crystallization of undercooled ternary alloy melt

physica status solidi (b) (2012)

Ying Ruan

Abstract Peri‐eutectic transition was investigated in terms of the dependence of crystallization behavior on undercooling in Cu–Ag–Ge ternary alloy composed of (Ag), ζ(Cu 5 Ge), and ε 2 (Cu 3 Ge) phases. (Ag + ε 2 ) pseudobinary eutectic is the product of both peri‐eutectic and subsequent pseudobinary eutectic transitions. Nanoscale structure of anomalous (Ag + ε 2 ) pseudobinary eutectic forms at the maximum undercooling, which is ascribed to the independent nucleation and growth from the liquid. The decrease of (Ag + ε 2 ) pseudobinary eutectic at a high undercooling is due to that the phase transition happening at the beginning solidification stage proceeds more thoroughly at a higher undercooling.

Supercooling

Eutectic bonding

10.1002/pssb.201248277

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Citations (3)

Rapid acquisition of liquid thermophysical properties from pure metals to quaternary alloys by proposing a machine learning strategy

Applied Physics Letters (2023)

Ruilin Xiao K. L. Liu Ying Ruan B. Wei

The establishment of reliable materials genome databases involving the thermophysical properties of liquid metals and alloys promotes the progress of materials research and development, whereas acquiring these properties imposes great challenges on experimental investigation. Here, we proposed a deep learning method and achieved a deep neural network (DNN) interatomic potential for the entire Ti–Ni–Cr–Al system from pure metals to quaternary alloys. This DNN potential exhibited sufficient temperature and compositional transformability which extended beyond the training and provided the prediction of the liquid structure and thermophysical properties for metallic materials with both density functional theory accuracy and classic molecular dynamics efficiency. The predicted results agreed well with the reported experimental data. This work opens a feasible way to address the challenges of rapidly and accurately acquiring thermophysical properties data for liquid pure metals and multicomponent alloys, covering a broad temperature range from superheated to undercooled state.

Characterization

10.1063/5.0160046

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Citations (4)

Structure and Property Modulations of 13Cr Stainless Steel Through Microgravity Solidification and Minor Ce Addition

steel research international (2021)

Ying Ruan Qingqing Wang B. Wei

Both rare‐earth doping and microgravity solidification processing bring significant influences upon the structure formation and mechanical properties of various alloys. Herein, the microstructure and performance of 13Cr martensitic stainless steel are modulated by adding minor Ce content and microgravity solidification by means of drop tube technique. The lattice structure of constituent phase α(Fe) is deformed evidently by microgravity solidification, and the lattice parameter variation is 1.8 times of that caused by Ce addition. The microstructures of this steel processed by arc melting consist of lath‐shaped martensites and a few feather‐shaped bainites whose volume fraction increases with the Ce content. The bainite is replaced by ferrite in the rapidly solidified microstructure of 13Cr steel under microgravity condition. Although both microgravity solidification and Ce addition induce the microstructure refinement and inclusion spheroidization, the former effect plays the dominant role. The compressive properties and microhardness decrease moderately with Ce addition due to the slight increase in bainite, however, the microgravity solidification brought the hardening effect and thus the microhardness of the steel droplets increases with undercooling.

Supercooling

Lath

Volume fraction

10.1002/srin.202100062

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Rapid growth of ternary eutectic un der high undercooling conditions

Science in China. Series G, Physics, mechanics & astronomy/Science in China. Series G, Physics, Mechanics & Astronomy (2004)

Ying Ruan

Rapid solidification of bulk Ag 42.4 Cu 21.6 Sb 36 ternary eutectic alloy is accomplished by glass fluxing method, during which the maximum undercooling attains 114 K (0.16 T E ). Under high undercooling conditions, the ternary eutectic consists of e(Ag 3 Sb), (Sb) and θ(Cu 2 Sb) phases, instead of (Ag), (Sb) and θ phases as predicted by the phase diagram. In the sample of small undercooling, the alloy microstructure is characterized by the mixture of primary θ(Cu 2 Sb), (e+θ) and (e+Sb) pseudobinary eutectics, and regular (e+θ+Sb) ternary eutectic. With the increase of undercooling, θ(Cu 2 Sb) primary phase and pseudobinary eutectics disappear gradually, and ternary eutectic transfers from regular to anomalous structure. When undercooling exceeds 102 K, anomalous (e+θ+Sb) ternary eutectic is the unique microstructure. Competitive nucleation and growth of these three eutectic phases is the main cause for the formation of complex growth morphologies. Based on the current experiments and theoretical calculations, it can be concluded that the intermetallic compound phase θ(Cu 2 Sb) is the leading nucleating phase.

Supercooling

10.1360/04yw0074

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Citations (10)

Hierarchical Microstructure Modulation of Ti–Co–Al Alloy by Rapid Die Casting Under Simulated Space Condition

Metallurgical and Materials Transactions B (2024)

H. R. Li Ruilin Xiao Liyuan Li Ying Ruan B. Wei

Die casting

10.1007/s11663-024-03009-1

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Non-retraction rebound of the impacting nano-droplets

Journal of Molecular Liquids (2021)

Tao Li Lishu Zhang Mingyu Li Meng Yan Erli Ni

Nanomaterials

10.1016/j.molliq.2021.115521

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Liquid phase separation and rapid dendritic growth of undercooled ternary Fe60Co20Cu20 alloy

Applied Physics A (2017)

F. P. Dai W. L. Wang Ying Ruan B. Wei

Liquid ternary Fe60Co20Cu20 alloy was undercooled by up to 357 K (0.21 T L) with glass fluxing method and its rapidly solidified microstructures were investigated by EDS and EBSD technologies. The ternary Fe60Co20Cu20 alloy rapidly solidifies with rapid dendritic growth of the primary γ-Fe phase within 37–243 K undercooling range. When the alloy melt is undercooled to 243 K, an obvious phase separation takes place and the uniform alloy melt separates into (Fe, Co)-rich and Cu-rich phases within 243–357 K undercooling range. The primary γ-Fe phase takes place in a solid-state phase transformation and becomes α-Fe phase in the final microstructure. The microstructure of α-Fe phase transforms from coarse dendrite at small undercoolings to equiaxed grain at large undercoolings. EBSD analysis reveals that the coarse α-Fe dendrites grows anisotropically with a $$\left\langle {110} \right\rangle$$ preferred orientation on condition that undercooling is less than 178 K, whereas no apparent preferred growth orientation is found in the equiaxed grains once undercooling exceeds this critical value. The growth velocity of primary γ-Fe dendrite increases up to 37 ms−1 as undercooling increases to 243 K, but it decreases as undercooling further increases, ascribing to that the dendrite growth is impeded by phase separation.

Supercooling

Equiaxed crystals

Dendrite (mathematics)

10.1007/s00339-017-1403-6

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Citations (7)

Peri-eutectic solidification and complicated microstructural evolution of liquid undercooled Cu–Ag–Sb alloy

Intermetallics (2012)

Ying Ruan W. J. Xie

Supercooling

10.1016/j.intermet.2012.07.011

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Citations (12)

Microstructual evolution in Ti-185 alloy prepared using electrostatic levitation and conventional casting techniques

Journal of Materials Research and Technology (2024)

Jianzhong Wang Yongxia Fan Qingbo Ao Jun Ma Ying Ruan

Ti and its alloys have been widely applied in various fields of national economy due to their excellent combinations of specific mechanical properties and outstanding corrosion behavior. Among Ti alloys, Ti–1Al–8V–5Fe (Ti-185) alloy is a metastable and low-cost β-Ti alloy, and owns extremely outstanding mechanical performance. In the paper, to overcome the issue of β flecks associated with Fe segregation in conventional ingot metallurgy process, Ti-185 alloy was prepared by electrostatic levitation (ESL) technique at various supercoolings, and its solidification behavior and dendrite growth were systematically analyzed. Moreover, the thermophysical parameters of liquid Ti-185 alloy were tested, and the microstructure, hardness and compressive property were compared to that of cast ingot. Results shown that the maximum supercooling of 311 K in the liquid Ti-185 alloy can be achieved, and a noticeable recalescence phenomenon appears during ESL process. The density and the ratio of specific heat to emissivity of liquid Ti-185 alloy increases linearly with temperature decreasing. Once the crystal nucleus is formed, the nonfacted interface will advance promptly. Moreover, the dendritic growth velocity (v) exhibits an exponential relationship with the supercooling (ΔT), and can be depicted as the equation of v = 1.59·ΔT1.65 mm s−1. Additionally, at a supercooling of 229 K or above, single crystal can be formed using ESL technique. Furthermore, the microhardness, elastic modulus and compressive strength of as-levitated Ti-185 alloy are hardly affected by the supercooling, but the plasticity of as-levitated sample is obviously higher than that of as-cast one.

Supercooling

Ingot

Recalescence

Dendrite (mathematics)

10.1016/j.jmrt.2024.03.097

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