Journal of Manufacturing Processes
·
2023
·
IF 6.2
Shuye Zhang,Jincheng Lin,Ce Wang,Peng He,Wei Wang,Xinfei Zhang,Tong Wu,Han Mei,Yue Liu,Panpan Lin,Tiesong Lin
The brazed joint of sapphire transparent ceramic and Kovar alloy was prepared using AgCuTi and AgCuTiB composite filler, and the main focus was the effect of B element on the wetting behavior, interface composition and joint mechanical performance. The reliable joint of sapphire transparent ceramic and Kovar alloy was obtained by vacuum brazing with AgCu28-6Ti-0.45B (wt%) composite filler. The typical interfacial structure of the joint brazed at 825 °C for 10 min was determined as sapphire/Ti 3 Cu 3 O/Ag(s,s) + Cu(s,s) + disperse TiB/TiFe 2 + TiNi 3 /Kovar. The results showed that the addition of B could contributed to an optimized interfacial structure via (i) in-situ forming fine TiB whisker reinforcement phase and refining the interface structure and (ii) reducing the diffusion degree of alloy side elements to inhibit the generation of brittle phase, and the maximum shear strength of the joint with AgCu28-6Ti-0.45B (wt%) reached 125 MPa more than twice the joint without B additive. On the other hand, the wetting experiment showed that the addition of B as a solid particle decreased the fluidity of the composite filler, and when the addition of B was excessive, no dense TiB whiskers were produced in the interface. This study provides ideas for the optimization and improvement of sapphire composite connection, and points out that the generation of reinforcing phase is accompanied by the reduction of fluidity, so it is necessary to reasonably control the proportion of reinforcing phase.
研究领域:
材料科学
·
焊接工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Sikai Chen,Qing-Yang Feng,Dong Li,Fei Song,Xiu-Li Wang,Yu-Zhong Wang
This investigation explores the relationships between the structure and properties of surface-grafted cellulose nanofiber (CNF)-based one-component composites. Critical parameters, including graft density, graft chain length, and interface structure, were systematically modified. Increasing the graft density and hydrophobic modification of the CNF surface significantly improved the thermal stability. Reducing the graft chain length increased the Tg of the graft chain. The hydrophobic modification of the CNF surface decreased the Tg of the graft chains, while increasing the graft chain length resulted in a reduction in the stiffness. Conversely, decreasing the graft density led to a remarkable enhancement in the toughness and strength of the nanocomposites. The hydrophobically modified nanocomposites exhibited a decrease in modulus and an increase in elasticity. These results highlight the significant role of interfacial interaction between CNF and the grafted polymer, which is equally crucial as the graft density in determining the properties of these composites.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Di Yang,Jinsheng Li,Changpeng Liu,Junjie Ge,Wei Xing,Jianbing Zhu
Rechargeable aqueous Zn–air batteries have been regarded as one of the most promising systems for flexible energy storage devices due to their high specific energy, safety, and cost effectiveness. However, Zn metal anodes exposed to strong alkaline electrolytes suffer from several issues such as corrosion, dissolution, and passivation, resulting in extremely poor cycle reversibility. Motivated by this challenge, we herein strategically design an MXene/Zn metal anode interfacial structure with single/few-layer Ti3C2Tx MXene as a protective layer. Such a design not only isolates the direct contact between Zn metal anodes and electrolytes but also inhibits zincate dissolution due to the ion screening function of Ti3C2Tx, potentially addressing the stubborn issues that Zn anodes faced with. As a result, the Ti3C2Tx-protected Zn metal anode exhibits superior cycle stability (stable for more than 400 cycles) to the bare Zn counterpart (20 cycles) at a high current density of 5.0 mA cm–2. When integrated into Zn–air coin cells, it has a high depth of discharge of 91% and operates stably for 140 cycles with small resistance. More interestingly, the excellent flexibility of the as-designed Ti3C2Tx-protected Zn metal anode endows the quasi-solid-state batteries with admirable voltage stability at different bending angles from 0 to 180°.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Yihua Yue,Zhongliang Huang,Dongren Cai,Shafqat Ullah,Abdul-Rauf Ibrahim,Xin Yang,Jiale Huang,Guowu Zhan
Controlled fabrication of spatial positions of different active sites on catalyst structures is critical to exploring the reaction mechanisms for CO 2 hydrogenation. Herein, two isomorphous zeolitic imidazolate frameworks (ZIF-67 and ZIF-8) were used as sacrificial templates to synthesize multi-layered Co 3 O 4 /ZnO catalysts with tunable core-shell structures and well-controlled spatial positions. The multi-layered catalysts were then evaluated for the catalytic performance for CO 2 hydrogenation. A series of characterization techniques were applied to investigate the morphology and structure of the Co 3 O 4 /ZnO composites with different spatial locations. Due to the unique multi-layered structure, the distinct interfacial structures, and the synergistic effects, the resultant core-shell structured Co 3 O 4 /ZnO nanocatalysts exhibited significantly enhanced activity as compared to their monometallic counterparts (pure Co 3 O 4 and ZnO). In addition, the ZnO@Co 3 O 4 with Co 3 O 4 as shell showed significantly higher CO 2 conversion (25%) than that of Co 3 O 4 @ZnO with ZnO as shell (0.82%). Furthermore, in-situ Diffuse Reflection Fourier Transform Infrared Spectroscopy (DRIFTS) analysis suggested that formate (HCOO*) and methoxy (CH 3 O*) species were the crucial intermediates in the CO 2 hydrogenation over the Co 3 O 4 /ZnO composite nanocatalysts. However, pure ZnO could not activate the CO 2 ; consequently, the use of the Co 3 O 4 /ZnO nanocatalysts derived from multiple-layered ZIFs structures provides new insights into improving the catalytic efficiency of CO 2 hydrogenation.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Fangfang Dong,Shengrui Cui,Chengliang Lin,Xin Wan,Ning Wang,Xiang Huang,Wei Liu,Yongcheng Jin
The insufficient structural stability of high-voltage spinel cobalt-free LiNi 0.5 Mn 1.5 O 4 (LNMO) throughout the cycling process hinders its widespread application. To address these issues, we incorporate elemental iodine into LNMO during the precursor preparation process using an ethanol-assisted hydrothermal method and successfully modify the bulk and interface coating structure of LNMO-3% I 2 . The incorporation of iodine not only induces the formation of a cavity and fast lithium-ion transfer pathway within the particles but also facilitates the development of a thin LiI coating layer on the surface of cathode materials. Compared with bared LNMO, LNMO-3% I 2 exhibits a capacity retention of 90.31% following 500 cycles at 1C and a capacity retention of 88.74% even following 450cycles at a high-rate of 50C. Furthermore, the cells with LNMO-3% I 2 demonstrate an excellent electrochemical performance under both high temperatures of 40 ℃ and low temperatures of −15 ℃. This study offers valuable insights into the simultaneous optimization of internal and external structures in cathode materials, thereby enhancing the long-term cycling performance of high-voltage lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Oleo Science
·
2024
·
IF 1.6
Aicha Mekkaoui,You Li,Zhaoming Ran,Ying Cai,Li Zhao,Baocai Xu,Ce Wang
In recent years, there has been a growing interest in regulating lipid digestion through the construction of various interfacial structures. In the present work, a series of complex interfacial structures were designed by combining Tween 80 in the aqueous phase and lecithin in the oil phase at different concentration ratios. The emulsification properties, the roles in regulating lipid digestion, and the interfacial dilatational rheological properties of the composite emulsifying systems were characterized. The results showed that the combination of Tween 80 and lecithin at different ratios could effectively modulate the rate of lipid digestion. The polyoxyethylene chains of Tween 80 formed a network, that provided a spatial obstacle for the adsorption of bile salts and lipases. Thus, Tween 80 significantly delayed the lipid digestion. The introduction of lecithin gradually replaced Tween 80 molecules at the interface, thus providing space for the adsorption of bile salts and lipases. In addition, as the ratio of lecithin concentration to Tween 80 increased, lecithin gradually became the dominant factor in the interfacial properties. As a result, the rate of lipid digestion was accelerated. Therefore, by compounding different ratios of lecithin and Tween 80, a series of emulsions with different lipid digestion rates were obtained. This research provides a basis for rationally designing food emulsions according to specific needs.
研究领域:
食品科学
·
化学工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Wei Guo,Zhiquan He,Jialu Li,Li Yao,Yadong Qiao,Fadi Wang,Yuhang Wang,Fengping Wang
Recently, 2D heterojunction materials have significant potential for application in humidity sensors due to their sensitive interface current regulation characteristics. Enhancing the contribution of the junction to the conductivity in the material is crucial for optimizing sensing performance. In this study, the n-n heterojunction of MoSe 2 @MoS 2 with a unique 3D interface structure was successfully prepared using a hydrothermal method to increase the heterojunction content. The heterojunction improves the charge transfer at the interface, enhances the sensitivity of the material, and shortens the gas response/recovery time. The sensitivity of MoSe 2 @MoS 2 with 3D heterojunction is one order of magnitude higher than that of single-phase MoSe 2 , and its response (recovery) time is shortened from 55 s (51 s) to 30 s (33 s) compared with single-phase MoS 2 . Furthermore, by optimizing the ratio of MoSe 2 and MoS 2 in the material, the contribution of heterojunctions to conductivity has been increased, thus enhancing the performance of gas sensing. More importantly, the sensing mechanism was deeply analyzed by exploring the changes of energy band and barrier before and after the sensor response.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Chao Guo,Hongqu Jiang,Yuan Luo,Haijun Wu,Qi Zhao,Xingxia Yang,Caiju Li,Jianhong Yi,Yichun Liu
High-strength wear-resistant materials have gained significant attention in current research. molybdenum disulfide (MoS 2 ), as a solid self-lubricating material for reinforcing copper(Cu)-based composites, has become a focal point for researchers. However, the reaction between MoS 2 and Cu during high temperature sintering leads to the formation of brittle phase, which compromises the interfacial bond. Therefore, this study attempts to improve the interfacial structure by introducing chromium (Cr) element through CuCr alloying with the expectation of mechanical and tribological properties improvement. Spark plasma sintering (SPS) is employed to prepare MoS 2 /CuCr composites and the effects of different MoS 2 contents (0–10 wt%) under various normal loads on frictional wear will be evaluated. The results demonstrate that Cr element addition facilitates the formation of compact Cr 3 S 4 compounds with MoS 2 at the interfaces, enhancing interfacial bonding with Cu and providing a solid foundation for maintaining excellent wear resistance during friction processes. With increasing content of MoS 2 , both coefficient of friction (COF) and wear rate initially decrease and then show an upward trend. Under the normal load of 20 N, compared with the CuCr composite, the friction coefficient of the composite with 7.5 wt % MoS 2 content is 0.281, which is significantly reduced by 37.7 %, and the wear rate is 0.1471( × 10 −3 mm 3 /N.m), which is reduced by 50.9 %. This research content can provide a better theoretical basis for changing the problem of poor wettability between the lubricating phase and the matrix.
研究领域:
材料科学
·
摩擦学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Bowen Yang,Tian Zhao,Shengyang Ji,Yan Liu,Minghao Xu,Baiyi Lu
Phytosterol , recognized for its health benefits, is predominantly extracted from plants and exhibits significantly reduced stability under varying light conditions. Their photooxidation is significantly influenced by emulsion interfaces. This study examined the mechanism of interface structure on phytosterol photooxidation with unparalleled molecular precision, utilizing molecular dynamics simulations and experimental procedures. Hydrogen bonding between the hydroxyl group at the C3 position of phytosterols and water molecules, coupled with van der Waals forces between the hydrophobic regions and the oil phase, induced phytosterol molecules to disperse toward the interface. The elevated polarity of the oil phase, specifically in tributyrin , facilitated the permeation of water molecules into the oil phase. This was achieved by diminishing the emulsion's interfacial tension , thereby fostering the development of more interface or micelles , and accelerating the photooxidation process of phytosterols. These simulations unraveled that the preponderance of phytosterol distribution is localized and oxidized at the oil-water interface.
研究领域:
食品科学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Pu Zhao,Zhengwei Li,Zhiwu Xu,Xuesong Liu,Jiuchun Yan
How to obtain a high-strength and corrosion resistance of Al/Sn/Al joint has been a longstanding goal for electronics industry. In this work, 6063Al was joined in the air by ultrasonic-assisted liquid phase diffusion bonding using a Sn filler metal . It was performed by applying an uninterrupted ultrasonic vibration at a heating temperature of 360 ℃, final obtaining a 6063Al joint without enriched-Sn. Under the action of ultrasonic vibrating, the breaking of oxide film , the diffusing of Sn, and dissolving of Al alloy occurred in sequence. It resulted in a transition of bonding interface from Sn/Al to an α-Al/α-Al bonding interface embedded a few Mg 2 Sn partials, after depleting Sn by grain boundary diffusion . The joints possessed a high strength coefficient of 86.7% of 6063Al base metal and 161.8% of soldering joint. The joint had a better corrosion resistance that the tensile strength only reduced 35.3% after a corroding of 72 h in 3.5 wt% NaCl solution in comparison with the soldering joints. Finally, the evolution of the interface structure and mechanism of improving corrosion resistance were discussed in detail. It is a promising technology for manufacturing high-reliable Al/Sn heterogeneous joints.
研究领域:
材料科学
·
焊接技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 35
·18872-18880
·
IF 11.9
Ningyun Hong,Jianwei Li,Shihong Guo,Huawei Han,Haoji Wang,Xinyu Hu,Jiangnan Huang,Baichao Zhang,Fang Hua,Bai Song,Nesrin Bugday,Sedat Yasar,Serdar Altin,Wentao Deng,Guoqiang Zou,Hongshuai Hou,Zhen Long,Xiaobo Ji
O3-type NaNi1/3Fe1/3Mn1/3O2 (NFM) is one of the most representative cathode materials with low cost and high capacity advantages. However, the sluggish diffusion kinetics and severe cathode–electrolyte interfacial reaction are serious roadblocks to commercialization. Hereby, a novel method of in situ V-modification is well-designed to play dual roles in reconstructing the crystal lattice and interface structure. Notably, the broadened layer spacing of O–Na–O and shortened TM–O bond are attributed to successful doping of V5+ into the bulk, accelerating the transmission of sodium ions and improving the structure stability. Concomitantly, the construction of a thin surface coating layer is beneficial for mitigating volume expansion and inhibiting structural degradation, which is validated by in situ X-ray diffraction coupled with the synchrotron X-ray absorption spectroscopy. Consequently, the rationally designed V-modified NFM cathode exhibits excellent cycling performances, exhibiting great capacity retention of 75.8% after 500 cycles at 2C in a half cell, and 85.6% capacity retention is observed after 150 cycles at 1C in the full cell. This work provides new insights into the development of O3-type layered oxide cathodes toward long-cycle life applications for large-scale energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Chinese Physics B
·
2025
·
IF 1.5
Wenxia Zhang,Weixia Shen,Chao Fang,Ye Wang,Yuewen Zhang,Liangchao Chen,Qianqian Wang,Kenan Li,Biao Wan,Zhuangfei Zhang
Improving the thermal conductivity of diamond-metal composites has always been a significant challenge in the field of thermal management. In this paper, diamond/Al composites were systematically studied, and the influence of holding time (10-120 min) on interface structure and thermal conductivity was discussed. The research results shows that the long-term thermal diffusion sintering can effectively the dense interfacial bonding of diamond/Al composites and enhance the thermal conductivity. The diamond/Al composites with 50 vol% 900 μm diamond attained the highest value of 888.73 W/mK under the sintering conditions of 650 ℃, 50 MPa, and 120 min, nearly 92% of the theoretical value predicted by the Maxwell model. This study establishes that high thermal conductivity can be achieved through long-term thermal diffusion alone, without the complex diamond surface coating and substrate alloying.
研究领域:
材料科学
·
热管理技术
✓ 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）