ULTRASONICS SONOCHEMISTRY
·
2024
·
IF 8.7
Xiaoqiang Zhang,Hongyue Chen,Yuhan Wang,Xin Gao,Zhijun Wang,Nan Wang,Duyang Zang
We investigate the effect of ultrasound on the evaporation and crystallization of sessile NaCl solution droplets which were positioned in traveling or standing wave ultrasound field. The experimental results indicated that the ultrasound field can significantly accelerate the evaporation rate of the sessile droplets and refine the crystal grains. By adjusting the distance between the sessile droplets and the ultrasound emitter, it is found that, in traveling wave ultrasound field, the sessile droplet evaporation time and the time for the appearance of NaCl grains exhibited a fluctuating increase as the droplet-emitter distance increased. While in the standing wave ultrasound, the sessile droplet evaporation rate increases with the increasing droplet-emitter distance. Overall, the traveling wave ultrasound field has a stronger effect on grain refinement of the sessile droplets than the standing wave ultrasound field. The grain refinement is attributed to the decrease of critical nucleation radius caused by ultrasound energy and the increase of the nucleation rate caused by the accelerated evaporation rate. In addition, the breakage of grains caused by ultrasonic cavitation would also lead to grain refinement.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Peng Xu,Weiwei Lu,Qianqian Zhu,Hao Hu,Haitao Liu,Binfeng Fan,Qingfu Wang,Xiangkui Yang,Kexing Song
To meet the stringent requirements of electrodeposited copper foil, graphene (Gr) has been recognized for its potential as an outstanding reinforcement agent, capable of significantly improving the mechanical and functional characteristics of copper foils. However, the effectiveness of Gr is often hindered by its poor dispersion and the weak interfacial bond strength with the metal matrix. In this study, we present a novel strategy that utilizes ionic liquid (IL) as a functionalizing agent to stabilize Gr for enhancing its reinforcement capabilities. This method has been demonstrated to successfully prepare copper foils with superior mechanical properties. Firstly, the impact of IL-functionalization on the dispersion, stability, morphology, and charge state of Gr was investigated. Subsequently, the IL-functionalized Gr (IL-Gr), serving as a reinforcement, was co-deposited with Cu 2+ ions to fabricate copper foil. The results revealed that the surface functionalization resulted in a well-dispersed and positively-charged Gr in solution. Under optimized conditions, the copper foil exhibited remarkable improvements compared to those prepared without IL-Gr. Specifically, the surface roughness decreased from 3.582 to 2.834 μm, while the tensile strength and elongation values of the copper foil increased from 253.7 MPa and 2.29% to 471.5 MPa and 7.19%, respectively. Further characterizations indicated that this simultaneous enhancement in both tensile strength and elongation could be ascribed to the refining grains (0.23 μm) and an increase in the density of Σ3 twin boundaries (23.4%), resulting from the cathode polarization of IL-Gr. Overall, our innovative and facile approach provides an effective method for fabricating high-performance electrodeposited copper foils.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MODERN PHYSICS LETTERS B
·
2019
·
IF 0.929
Y. Zhang,M. M. Fan,C. C. Ruan,Y. W. Zhang,X.-J. Li,H. Z. Song
Bi 2 Sr 2 Co 2 O y ceramic samples have a structure similar to phonon glass electronic crystals, and their thermoelectric properties can be effectively adjusted through repeated grinding and sintering. The results show that multi-sintering can make their grain refined and increase their grain boundary, which will effectively increase density and phonon scattering. Finally, multi-sintering can reduce the resistivity and thermal conductivity, thus obviously improve thermoelectric figure of merit ( Z T ) of Bi 2 Sr 2 Co 2 O y . The optimum Z T value of 0.26 is achieved at 923 K by the third sintered sample.
研究领域:
材料科学
·
热电材料
·
无机非金属材料
·
凝聚态物理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yichao Gong,Jiarui Li,Lin Liu,Zhaokun Li,Longchao Zhuo,Guojun Zhang
Multiphase composites of lithium ceramics have emerged as a prominent area of research in the development of advanced solid tritium breeding materials. In this study, Li 2 TiO 3 /Li 2 SiO 3 co-doped Li 4 SiO 4 ceramic pebbles were prepared through an in-situ reaction between Li 4 SiO 4 and TiO 2 . The objective of this study is to enhance the thermal cycling stability of Li 4 SiO 4 by impeding the grain boundary migration of Li 4 SiO 4 under high temperature conditions. The effects of the in-situ generated Li 2 TiO 3 /Li 2 SiO 3 particles on the microstructure, crush load and thermal cycling stability of Li 4 SiO 4 ceramic pebbles were investigated. The in-situ formed Li 2 TiO 3 and Li 2 SiO 3 particles effectively hindered the grain growth and minimized the formation of large intracrystalline pores in Li 4 SiO 4 . At a sintering temperature of 900 °C, the Li 2 TiO 3 /Li 2 SiO 3 particles are beneficial in increasing the crush load of Li 4 SiO 4 ceramic. However, at lower sintering temperatures, their impact was counterproductive. An increase in the volume fractions of the Li 2 TiO 3 /Li 2 SiO 3 had a positive effect on grain refinement but a negative effect on crush load. The Li 2 TiO 3 /Li 2 SiO 3 co-doped Li 4 SiO 4 ceramic pebbles exhibited excellent structural stability during thermal cycling. The optimum mechanical stability was achieved at a TiO 2 addition of y = 0.1. The in-situ generated fine second phase particles effectively impeded grain boundary migration at high temperatures, providing a viable strategy for improving the thermal stability of Li 4 SiO 4 tritium breeders.
研究领域:
材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Peng Xu,Weiwei Lu,Kexing Song,Haoyan Cheng,Hao Hu,Qianqian Zhu,Haitao Liu,Xiangkui Yang
Improving the properties of electrodeposited copper foil, the negative current collector of lithium-ion batteries, is crucial to the ongoing development of high-energy–density batteries. Despite the broad usage of chemical additives to regulate the copper foil, there remains substantial room for advancement due to the complexity of the mixed additives and the lack of related mechanism research. In this study, a functionalized ionic liquid, 1-aminopropyl-3-methyl imidazole chloride ([C 3 NH 2 CIm][Cl]), was designed and used as a new and single additive for controlling the deposition growth of Cu 2+ ions, allowing the preparation of copper foil with ultrahigh tensile strength and simultaneously high elongation. By using the optimal [C 3 NH 2 CIm][Cl] concentration of 30 mg/L, copper foil with a tensile strength of 455.6 MPa and an elongation as high as 17.1 % can be achieved. Subsequent structural characterizations and electrochemical analysis suggested that the addition of [C 3 NH 2 CIm][Cl] regulated the grain growth through cathode polarization and enhanced the copper foil properties by refining crystal grains and increasing the density of the Σ3 twin boundaries of the copper foil. A detailed understanding of the mechanism through which [C 3 NH 2 CIm][Cl] affects Cu 2+ ions electrodeposition is crucial for the development of innovative additives for electrodeposited copper foils, particularly for the production of high-property copper foils.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2024
·
IF 32.4
Yunlong Deng,Jian Gao,Ming Wang,Jinxiang Deng,Yicheng Zhou,Wei Sun
Effective lithium (Li) metal alloying in adjusting its crystallization process offers a reliable approach to refine the grain size and alter the grain boundary composition, consequently enhancing its stripping/plating behavior. Key requisites for the alloying composition include a high melting point, which aids in heterogeneous nucleation of lithium metal, and a robust adsorption of lithium ions. Using the Bramfitt equation as a basis, this study demonstrates that Al2Yb facilitates heterogeneous nucleation with Li, leading to grain refinement and an increase in active sites. Al2Yb's superior adsorption energy compared to Li is noteworthy, enabling the dense deposition of lithium ions on the electrode surface, forming a flat surface that effectively suppresses side reactions. Consequently, the Li–3Al–1Yb electrode exhibits exceptional material structural stability, electrochemical cycling stability, and rate performance in various cell configurations, including Li–Li symmetrical coin cells, Li‖NCM811 cells, and pouch cells. This investigation not only offers insights into addressing challenges related to dendrite growth in metal lithium but also contributes to the improvement of both electrochemical and mechanical properties.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yao Yang,Shuyong Liang,Jianqiang Bi,Hongli Hou,Linjing Qiao,Shushuai Liu,Tao Wang,Hongyu Gong,Zhao Qian,Jinwang Shi,Weiqiang Li
In general, the grains of ceramic materials tend to grow and coarsen with the prolonging of holding time at high temperatures due to grain boundary migration. In this study, high-entropy diboride ceramics composed of (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 were prepared using spark plasma sintering (SPS) at 30 MPa. Notably, grain refinement of the high-entropy diboride ceramics with increased holding times during the SPS process was unexpectedly observed. Specifically, the grain sizes of the (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 were refined from approximately 6 µm (synthesized at 1900°C for 5 min) to around 2 µm (synthesized at 1900°C for 10 min). This intriguing phenomenon is likely attributable to the intrinsic lattice distortion observed in high-entropy ceramics. The introduction of VB 2 was found to significantly enhance lattice distortion, playing a crucial role in the grain refinement of the (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 . Notably, the grain refinement resulted in significant improvements in flexural strength and fracture toughness. This work offers a novel strategy for tailoring the microstructure and mechanical properties of high-entropy ceramics.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2018
·
IF 2.943
Kewei Li,Fei Gao
The heterogeneity of grain refinement and texture formation in conductive copper powder during pulsed electric current sintering have been investigated by means of microstructural analysis of the particle-contacting zone of the samples sintered with micron-sized powders. The particle-contacting region was indicated to experience a higher level of grain refinement than the particle center due to the inhomogeneous temperature distribution among the particle when pulsed electric current passed through. Meanwhile, two main textures of Cube (1 0 0)[0 0 1] texture and Goss (1 1 0)[0 0 1] texture were directly detected in the sintered Cu samples by a combination of electron backscatter diffraction and X-ray diffraction. Based on the experimental results, a feasible mechanism for the formation of texture during the pulsed electric current sintering has been proposed by considering the applied uniaxial pressure and pulsed electric current as well as the rearrangement of grains. In addition, the effects of heterogeneous grain refinement and texture formation on the tensile properties of the sintered Cu samples were also discussed based on the tensile properties and fractographic. These results would contribute to the basic understanding of the sintering mechanisms in pulsed electric current sintering process.
研究领域:
材料科学
·
金属学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xinyu Ping,Xiaoyu Pan,Bin Meng,Qingqing Yang,Wenlong Zhang
The dielectric performance of BaTiO 3 -based ceramic capacitors must be improved for further miniaturization and integration of energy storage devices. This study combines two optimization strategies, the grain refinement and high-entropy effect, to design BaTiO 3 -based high-entropy nanocrystalline ceramics: Ba(Ti 0.2 Zr 0.2 Nb 0.2 Y 0.2 Sn 0.2 )O 3 (HEO1) and Ba(Ti 0.2 Zr 0.2 Nb 0.2 Yb 0.2 Hf 0.2 )O 3 (HEO2). These ceramics were synthesized using fast hot-pressing sintering (FHPS), yielding HEO1-FHPS and HEO2-FHPS samples, both of which exhibit a pure perovskite structure, similar to that of samples fabricated via conventional solid-state sintering (CS), namely HEO1-CS and HEO2-CS. The relative densities of the HEO1-FHPS (96.18 %) and HEO2-FHPS (98.34 %) samples are higher than those of HEO1-CS (95.47 %) and HEO2-CS (95.40 %). In addition, the grain sizes of HEO1-FHPS (0.092 μm) and HEO2-FHPS (0.084 μm) are notably smaller than those of HEO1-CS (2.48 μm) and HEO2-CS (2.91 μm). The high relative density and small grain size of HEO1 and HEO2 improve their maximum permittivity, increase the Curie temperature and enhance dielectric stability. Furthermore, compared with HEO1-CS and HEO2-CS, HEO1-FHPS and HEO2-FHPS exhibit higher critical electric field strengths (359 and 389 kV/cm), greater recoverable energy densities (0.40 and 0.88 J/cm 3 ) and improved energy storage efficiencies (69.6 % and 70.4 %). These findings provide a promising approach for developing BaTiO 3 -based ceramics with enhanced dielectric performance.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 4
·695
·
IF 3.4
Gen Li,Zhixiang Chen,Zhiwen Tan,Ran Tian,Yuantao Zhao,Lianbo Wang,Wenge Li,Yanbo Liu
The current work synthesized Ni-SiC composite coating with different SiC microparticle contents. The role of the SiC microparticle in designing the Ni-SiC composite microstructure was revealed. The SiC microparticle physically interrupted the continuous growth of the underlying columnar Ni grains. The columnar Ni grain between the embedded SiC microparticle grew without disturbance. Only upon SiC microparticles was a new layer starting with refined Ni grains observable. The vertical columnar Ni grains reappeared as the position departed the SiC microparticle upper surface. The increase in the contents of the SiC microparticle led to an increased level of grain refinement and the elimination of the (200) fiber texture. Besides that, the number of V-shaped valleys increased as well. Corrosion testing results show that the corrosion resistance of Ni-SiC composite coating increased with the increased SiC contents, which was mainly due to the optimized microstructure.Keywords:Ni matrix composite;SiC microparticles;deposits growth behavior;grain refinement;corrosion resistance
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xiaofei Wang,Jinping Li,Cheng Yang,Hui Zhang,Songhe Meng
It is difficult to achieve densification for metastable ceramics at ultra-low temperatures sintering due to insufficient sintering kinetics. Here, one strategy is proposed to enhance ceramic densification based on the principles of grain refinement and interface modification, in conjunction with a cold sintering process (CSP, 190 °C, 1 − 240 min, and 350 MPa) to achieve ceramic fabrication in a solid-liquid coexistence sintering environment. ZrW 2 O 8 @ZrO 2 metastable composites as an example to demonstrate the effect of surfactant on grain tailoring and interfacial structure design during the hydrothermal assembly. The results show that the densities and mechanical strengths of the composite ceramics were significantly improved after the shape tailoring. Furthermore, the shape-tailored strawberry-like nanostructure enables the ZrW 2 O 8 to be split into smaller individual units, which allows the composites to achieve a high-level of zero thermal expansion ( α ‾ = 0.045 × 10 −6 °C −1 [-10 − 300 °C]). Such a methodology can effectively solve ceramic densification in ultra-low temperature sintering and provide a practical path for the fabrication of metastable ceramics.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Jiabao Zang,Haifeng Li,Zirui Li,Jihui Sun,Yijian Liu,Xutao Yan,Li Sun,Meijie Zhang
The pure spinel ferrite still cannot exhibit unsatisfactory electromagnetic wave (EMW) absorption performance. In this study, the single‒phase, Co, Ni, and Zn co-doped, porous, defective, nano‒microcrystalline self‒assembled 1D rod‒shaped spinel ferrites were successfully synthesized by coprecipitation combined thermal decomposition method. The sample Co0.5Ni0.2Zn0.3Fe2O4 (C5N2Z3‒C) exhibited excellent EMW absorption performance with a RLmin of ‒65.4 dB at a thickness of 3.2 mm and a EABmax of 7.8 GHz at 2.8 mm. The excellent EMW absorption performance was confirmed to be attributed to its specific microstructure, which precisely regulates the dielectric loss, breaks the Snoek limit and greatly improve the magnetic loss. The EMW dissipation mechanism of the sample C5N2Z3‒C were also surveyed in detail, including optimized impedance matching, multiple reflection and scattering, interfacial polarization and dipole polarization, and multiple natural and exchange resonances. The magnetic properties were controlled by ion doping, the magnetic anisotropy field was regulated by the preparation of porous particles with special morphology, the polarization loss was improved by abundant fine-grained boundaries, heterogeneous interfaces and lattice defects, thus the enhancement of its EMW absorption performance was achieved by multiple regulation.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）