CARBON
·
2023
·
IF 10.9
Bin Wang,Yaotian Yan,Jinghuang Lin,Yifei Cai,Jian Cao,Junlei Qi
Efficient multi-path heat dissipation is urged to be designed for balancing the heat density generated in highly integrated electronic devices. Herein, aluminum foam/carbon composites were fabricated by chemical bath and annealing method to realize the effect of strengthening the effective thermal conductivity while retaining the convective heat transfer characteristics of the porous structure . The results show that the continuous and high crystalline carbon coating can be obtained in the optimized composites prepared with 350 g dopamine addition at 600 °C annealing temperature. When compared with amorphous carbon , the phonons in crystalline carbon can carry more energy during the heat transport in terms of high phonons density of states, and their scattering behavior can be alleviated. A smaller temperature gradient is further established in the system. Hence, a desirable thermal conductivity, 21.44 W m −1 K −1 , is obtained in the optimized composites, which is almost 3 times that of pristine aluminum foam (7.67 W m −1 K −1 ). Additionally, the remarkable cooling efficiency of 24.71% in comparison to other studies, suggests that aluminum foam/carbon composites hold great potential as thermal management materials in addressing the issue of intense heat generation.
研究领域:
材料科学
·
热管理工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 3
·030519
·
IF 3.9
Yi Shuai,Yilong Hu,Jin Lou,Xiongwei Gong,Mingxi Li,Zhixin Xu,Duoduo Deng,Fenglin Jiang,Ming Li
Sodium metal batteries have attracted extensive attention because of the high availability and energy density of Na; however, the practical application of these batteries is significantly plagued by dendritic growth. Aluminum metal has a unique advantage as a current collector for sodium metal anodes because of its low density and low cost. However, problems with dense aluminum oxide mean its application in sodium metal anodes has seldom been studied. In this study, aluminum foam was fluorinated by a facile method and compounded with sodium metal at high temperatures to prepare a sodiophilic aluminum foam@sodium electrode (NaHFAl). Because of the sodiophilic surface, NaHFAl achieves a non-dendritic deposition morphology and markedly reduced voltage hysteresis in symmetric cells for over 2200 h. The NaHFAl/carbonate electrolyte/sulfurized polyacrylonitrile (SPAN) cell exhibited excellent cycle performance, with a capacity retention of 68% after 800 cycles. Our work provides an easily scalable and cost-effective approach for the development of high-performance sodium metal anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
·
2018
·Vol. 49
·期 8
·3683-3691
·
IF 1.887
Cai Xiaoping,Liu Yanan,Wang Xiaohong,Jiao Xinyang,Wang Jianzhong,Akhtar Farid,Feng Peizhong
Open-cell Fe-Al intermetallic foams were successfully prepared by a simple and energy-saving thermal explosion (TE) process. The effects of the Fe/Al molar ratio (Fe-(40–50) at. pct Al) and thermal treatment temperature on the TE temperature profile, phase composition, pore characteristics, and oxidation resistance of the prepared foams were investigated. The results showed that the Al content significantly influenced the ignition ( T ig ) and combustion ( T c ) temperatures of the TE process; in particular, as the Al content decreased, T ig increased gradually from 623 °C to 636 °C and T c decreased from 1059 °C to 981 °C. FeAl was identified as the dominant phase in the thermally treated foams. The Fe-Al intermetallic foams displayed an open porosity of 60 vol pct, with pores connected with each other to form an open pore structure. The formation of the pores was attributed to the expansion of interparticle pores in the pressed body during the TE reaction. X-ray photoelectron spectroscopy analysis of the Fe-50Al foam showed that the Al 2p and O 1s binding energies were 74.5 eV and at 531.4 eV, respectively. The formation of a surface alumina layer in the early stages of the oxidation process resulted in the parabolic oxidation rate law, and the Fe-50Al foams exhibited an excellent resistance to oxidation at 650 °C in air. These results suggest that the synthesized Fe-Al foams represent promising materials for applications involving an oxidizing environment and high temperatures.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Yuwei Wang,Baoli Ou,Ping Zhu,Bo Niu,Yan Guo,Qian Zhi
By combining organic materials with metal materials, it is easy to obtain new composite materials with excellent properties. Here, an excellent performance aluminum foam epoxy resin composite material (AFE) was prepared by heat-assisted vacuum infusion technology. Owing to the unique foam structure of aluminum foam (AF) and excellent physical and chemical properties of modified epoxy resin, the AFE with an interpenetrating network structure shows excellent wear resistance, bending resistance and corrosion resistance . The SEM images show that the filling efficiency of epoxy resin to AF is over 99%, and the epoxy resin was tightly combined with the metal foam . The surface and mechanical properties test results show that AFE has excellent mechanical properties and high wear resistance, the maximum bending σ b and tensile strength σ t can reach 74.33 MPa and 42.09 MPa, respectively, and the minimum wear rate Ws is 8.231 × 10 −4 mm 3 /Nm. Tafel polarization curve and electrochemical impedance spectroscopy (EIS) results show that the AFE has excellent corrosion resistance , with corrosion current i corr as low as 1.399 × 10 −9 A•cm −2 and Z 0. 01 Hz as high as 7.74 × 10 7 Ω•cm 2 after superhydrophobic treatment process.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
International Journal of Metalcasting
·
2025
·
IF 2.5
Du Danfeng,Nie Xinfeng,Sun Chaowei,Liu Zexin,Guo Xiurong
Aluminum foam often collapses during the foaming process, adversely affecting its pore structure and resulting in suboptimal compression and energy absorption performance. To address this issue and enhance the mechanical properties of aluminum foam for broader applications in the automotive industry and other fields, this study developed an Al/TaC foam composite (AT-FC) using powder metallurgy. The composite incorporates tantalum carbide (TaC) as reinforcement particles, titanium powder as a combustion aid, titanium hydride as a foaming agent, and wood fiber as a space-holder material. The effects of varying TaC content on the pore structure and distribution of the aluminum foam composite were systematically investigated, alongside axial quasi-static compression tests. The results reveal that TaC content significantly influences the porosity and pore distribution of aluminum foam, while the inclusion of wood fiber as a spatial support material effectively prevents collapse. Compression tests showed that the mechanical properties were optimized with 10% TaC content, achieving a compressive strength of 10.223 MPa and an energy absorption capacity of 3.977 MJ/m 3 before reaching the densification strain. Graphical
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
·
2024
·Vol. 47
·期 8
·2905-2921
·
IF 3.1
Siran Wang,Zhangcheng Yin,Xudong Rong,Haipeng Song,Xudong Yang,Naiqin Zhao
The unsatisfactory fatigue performance of Al foams significantly limits their engineering applications. Meanwhile, the unique pore structure of metal foams makes it still challenging to assess its fatigue. Herein, we report an innovative strategy for preparing carbon nanotubes reinforced Al-Cu-Mg (CNTs/Al-Cu-Mg) composite foams, which exhibit superior compressive strength (16.17 MPa) and fatigue strength (11.17 MPa). Statistics analysis confirms that the fatigue life ( N f ) follows Weibull distribution, and P-S-N curves were obtained to calculate the theoretical stress level required to achieve the expected N f . Moreover, computer vision is utilized to monitor the fatigue deformation process and effectively detect fatigue crack initiation sites. Notably, the accuracy of predicted N f obtained by this method is exceptionally high (98.32%). This work provides a theoretical and practical basis for designing metal foams with superior fatigue properties and offers a promising bottom-up tactic for predicting the N f of metal foams to prevent fatigue failure. Highlights The CNTs/Al-Cu-Mg composite foams possess the superior fatigue strength of 11.17 MPa. The application of computer vision enables the accurate monitoring of FCIS. A novel exploration into the fatigue assessment of metal foams is developed.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Zhoufei Yang,Jin Wang,Chaojie Cui,Ying Jin,Gang Zhang,Henghui Zhou,Weizhong Qian
Compared with aluminum foil (Al foil), the three-dimensional (3D) aluminum foam (Al foam) has the characteristics of 3D interconnected metal wires and through-hole structure with high specific surface area, which exhibits great potential for application in high-power energy storage devices. In this work, 3D Al foam-based and Al foil-based cathode sheets were fabricated and assembled into pouch cells. In-situ XRD was employed to analyze the electrochemical reaction behavior of the two types of porous electrodes . The 3D Al foam-based cathode demonstrated faster electron transfer and lithium-ion diffusion as compared to the Al foil-based electrode, which is helpful for a uniform electrochemical reaction and decreases the electrochemical polarization. Electrochemical simulations and porous electrode models were built to understand these phenomena. The Al foam-based LiFePO 4 batteries exhibit much better power and energy performance than Al foil-based LiFePO 4 battery. The power density of the Al foam pouch cells is 7.0–7.7 kW/L when the energy density is 230–367 Wh/L, which is the highest power and energy density among reported Al foam-based devices. The new findings open up opportunities for the development of high-power and high-energy-density commercial batteries.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
多孔材料
·
固态物理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jingjing Liu,Jinlong Yang,Jiyuan Zhang,Haiyang Chen,Shaojun Kang
Porous materials with wrinkled surfaces could have broad applications in catalysis and adsorption. However, designing cellular ceramics with similar structures is challenging. Herein, we demonstrated the binary colloidal self-assembly of γ-Al 2 O 3 nanoparticle/silica gelation network for constructing such materials. The competitive effect between volume shrinkage and surface bend during water evaporation of silica gel contributed to wrinkled aperture surface. During calcination , silica nanoparticles were highly active to react with alumina to form mullite nanocrystals , bringing about high compressive strength at low relative densities. After calcining at 1350 °C, resultant products with hierarchical structure exhibited an outstanding compressive strength of 4.2 MPa, a relatively high surface area of 7.23 m 2 /g at a porosity level of 83.3%. The current strategy provides a feasible and affordable approach for producing high performance ceramic foams towards practical application fields in catalysis and adsorption.
研究领域:
材料科学
·
无机非金属材料
·
纳米材料
·
功能陶瓷
·
胶体与界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 20
·13135-13146
·
IF 3.442
Dong Peiran,Long Chunguang,Peng Ying,Peng Xin,Guo Fangyu
The purpose of this work is to solve the problem of interface bonding in aluminum foam (AF)/polyoxymethylene (POM) interpenetrating phase composites (AF/POM). Silane coupling agent (KH-550), graphene oxide (GO), sulfonated graphene (S-GNS) and graphene (GS) coatings were prepared on the surface of AF, respectively, as an interfacial transition layer. The molten modified POM(POM C ) was injected into the hole of coated AF by injection molding to prepare different kinds of coated AF/POM C . Thermal conductivity, friction coefficient and wear loss of coated AF/POM C were analyzed, and the wear mechanisms were discussed in detail based on evidences from SEM. The effect of coatings on thermal conductivity of coated AF/POM C was also verified by ANSYS. The investigation has shown that four kinds of coating are successfully covered on the surface of AF, respectively, and the morphology of S-GNS coating is the smoothest. The thermal conductivity of coated AF/POM C is higher than that of AF/POM C . The thermal conductivity of S-GNS-AF/POM C reaches the highest value of 2.25 W m −1 K −1 , because S-GNS coating plays a role in reducing the thermal resistance of the interface between AF and POM C phases. The friction coefficient and wear loss of coated AF/POM C are also lower than that of AF/POM C . Three types of graphene coating(S-GNS,GO,GS) as an interface transition layer between AF and POM C phases can homogenize friction, accelerate heat transfer and reduce the friction coefficient and wear loss of composites. Through ANSYS thermal steady-state simulation, S-GNS-AF/POM C has the maximum number of heat flow paths and the highest heat flux compared with other materials.
研究领域:
材料科学
·
机械工程
·
热能工程
·
表面工程
✓ 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）