JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Chuang-Tian Zhan,Sheng-Jin He,Wei-Ming Guo,Yuan-Bin Chen,Shi-Kuan Sun,Hua-Tay Lin
Combined with the thickness control of interlayers (∼10 µm and ∼60 µm), SiC nano-powders with Al 2 O 3 -Y 2 O 3 -MgO-CaO additive (NITE-SiC) were used as the joining materials to achieve the low-temperature joining of SiC ceramics. Some residual pores were observed in the interlayer with a thickness of ∼60 µm after joining at 1650 ℃, and the shear strength of SiC joints measured was 39.3 ± 5.5 MPa. Observations showed the fracture of joints occurred at the interlayer. When the thickness of the interlayer decreased to ∼10 µm, no cracks or porosity were observed at the interface region after joining at 1650 ℃. The shear strength of SiC joints increased to 69.5 ± 8.9 MPa, and the fracture originated from the matrix. The results demonstrated using NITE-SiC with Al 2 O 3 -Y 2 O 3 -MgO-CaO additive as the joining layer and reducing the thickness of the interlayer could lower the joining temperature and significantly improve the mechanical strength of joints.
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
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Yu Zhang,Xu Shen,Qin Ma,Shuang Mu,Shaoming Dong,Jinshan Yang
In this work, the mechanical behavior of NITE-SiC f /SiC composites, accompanied by the damage mechanisms of SiC fibers and BN interphase during NITE process, are investigated. The results show that the fracture characteristic of NITE-SiC f /SiC composite is transformed from quasi-ductile mode to brittle mode with the elevating temperature, as well as severe damage of SiC fiber and BN interphase. The damage of SiC fibers is originated from high temperature, sintering aids corrosion and matrix compression. High temperature and sintering aids diffusion lead to the grain growth and strength degradation of SiC fibers. The damage of BN interphase is caused by the sintering aids corrosion, mainly the reaction of Al 2 O 3 , and matrix compression. The stress distribution is simulated via finite element analysis proving that up to 17.5 GPa and 17.0 GPa stress originated from matrix shrinkage during sintering process is applied to the fiber and interphase respectively, making the fiber deformation and interphase fragmentation. The degraded fiber strength and destroyed interphase structure weaken the load-bearing capacity and crack deflection ability, causing degradation of mechanical properties and reliability of composites. This work helps to comprehensively understand and optimize the properties of SiC f /SiC composites prepared by NITE process.
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 THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Hao Zhou,Ziyan Zhao,Hui Zhang,Jinjing Yang,Anle Sun,Xuejian Liu,Zhengren Huang,Yan Liu
To expand the application of SiC/SiC joints under extreme conditions, Nano-Infiltration and Transient Eutectic (NITE) joining technology with AlN-Y 2 O 3 as a sintering additive was successfully developed. The rheological properties of the slurry and the microstructure evolution of the joints were systematically characterized by rheometer, SEM, EDS, EBSD , and TEM , respectively. Both room-temperature and high-temperature flexural strength was measured to evaluate the mechanical properties of the joints. An immersion test with concentrated nitric acids was performed to evaluate the corrosion resistance of the joints. The defect-free joining layer was composed of a dense α-SiC phase, a small amount of YAG(Y 3 Al 5 O 12 ) distributed in the triangular grain boundary, and a Y-Al-O glass phase from AlN-Y 2 O 3 . The mechanism of NITE joining could be attributed to the incoherent growth of the newly generated α-SiC in the joining layer along the α-SiC substrate. The maximum room-temperature strength of the joints was 320.5 ± 37.6 MPa. When the test temperatures were 1000 °C, 1200 °C, and 1400 °C, the flexural strength reached 238.7 ± 33.1 MPa, 215.5 ± 52.5 MPa, and 166.9 ± 52.0 MPa, respectively. After immersing the joints in a concentrated HNO 3 for 168 h, the flexural strength was 173.3 ± 12.6 MPa. The joints' excellent mechanical properties and corrosion resistance reveal great application potential under extreme conditions.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Haidong Zhao,Xiaoyan Hu,Hongjie Kang,Feng Feng,Yong Guo,Zhen Lu
In this paper, NiSb/NiTe/Ni composites were smoothly developed via the microwave method for supercapacitors. The synthesis of NiSb/NiTe crystals was revealed by X-ray photoelectron spectroscopy and X-ray diffraction. The analytic results of scanning electron microscopy and energy dispersive spectroscopy uncover the microscopic morphology as well as the constituent elements of the composites. Self-supported NiSb/NiTe is a supercapacitor cathode that combines high capacitance with excellent cycling stability. The obtained composite electrode displayed remarkable electrochemical properties, presenting a special capacitance of 1870 F g–1 (1 A g–1) and 81.5% of the original capacity through 30,000 times (10 A g–1) of the charging/discharging process. Further, an asymmetric supercapacitor was prepared employing NiSb/NiTe as a cathode and activated carbon as an anode. NiSb/NiTe//AC exhibited a high energy density of 224.6 uW h cm–2 with a power density of 750 μW cm–2 and provided a favorable cycling stability of 83% after 10,000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Minghui Xing,Zelong Qiao,Ziqiang Niu,Shitao Wang,Zhiping Liu,Dapeng Cao
Discovering highly efficient and stable non-precious metal catalysts for the oxygen evolution reaction (OER) is crucial for energy conversion in water splitting. However, preparing high-performance OER catalysts and elucidating the structural changes in the process are still challenging. Herein, we synthesize the NiTe/Ni2P heterostructure and demonstrate the strain engineering of NiTe/Ni2P via the lattice incompatibility between the phosphide and the telluride. The strain engineering of the NiTe/Ni2P heterostructure not only significantly boosts the OER activity but also effectively stabilizes the intrinsic structure of the catalyst after the OER process by using the in situ-produced metal salt as a protection layer. After the OER stability test, no oxyhydroxide phase is observed, and in situ Raman spectroscopy reveals that a voltage-dependent phase transition appears during the OER, which is different from most previously reported Ni-based catalysts, for which the generation of irreversible NiOOH occurs after the OER. Density functional theory calculations further reveal that the tensile strain of Ni2P will inhibit the presence of irreversible phase transitions of Ni2P into NiOOH due to the weak adsorption ability of the oxygen species caused by strain engineering. In short, this work opens a new gate for using strain nanotechnology to design high-performance OER catalysts.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 9
·6410-6421
·
IF 3.5
Hao Chen,Jianjun Chen,Jiahao Yang,Zahoor Ahmad,Mingming Zhu,Yilian Xiong,Jiyu Tao,Jinxia Li
In this work, stacked SiC fibers paper-reinforced SiC ceramic matrix composites (SiC nf /SiC CMCs) were prepared by nanoimpregnation and transient eutectic (NITE) process using ultra-long single-crystal SiC nanofibers. The effect of the SiC nf surface modification via boron nitride (BN) interphase deposition as well as the sintering additive (Al 2 O 3 –Y 2 O 3 ) content on the density, microstructure, and mechanical properties of SiC nf /SiC CMCs has been investigated systematically. The results revealed that the laminated SiC nf /SiC CMCs feature a significant saw-tooth-like curve on the load–displacement test, which indicates that the obtained laminated structure with the weak interlayer binding owning to the BN coating treatment possesses significant toughening to the SiC ceramics. Specifically, the SiC nf /SiC CMCs with the sintering additive content of 12 wt% revealed a fracture toughness of over 10 MPa m 1/2 after 60 min of BN interface deposition, which is 104.31% higher than that of the composites prepared without BN coating.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 5
·期 3
·507-514
·
IF 4.136
Beirong Ye,Miaoliang Huang,Quanlin Bao,Si Jiang,Jinhua Ge,Huang Zhao,Leqing Fan,Jianming Lin,Jihuai Wu
Graphical Foam support : A NiTe/NiSe composite electrode supported on a Ni foam is synthesized by using a two-step process involving a hydrothermal method and cyclic voltammetry electrodeposition. The NiTe/NiSe composite electrode exhibits excellent electrochemical performance with a specific capacitance of 1868 F g −1 (5.60 F cm −2 ) at 1 A g −1 and remarkable cycling stability. The asymmetric supercapacitor based on a NiTe/NiSe positive electrode has a high specific capacitance of 94.9 F g −1 as well as a maximum energy density of 33.7 Wh kg −1 and power density of 4000 W kg −1 . NiTe/NiSe composites grown in situ on Ni foam are successfully developed as a binder-free electrode for supercapacitors. The as-obtained NiTe/NiSe composite electrode exhibits excellent electrochemical properties with a higher specific capacitance of 1868 F g −1 (5.60 F cm −2 ) at a current density of 1 A g −1 . In addition, an asymmetric supercapacitor is fabricated with NiTe/NiSe as the positive material and active carbon (AC) as the negative material. The resulting NiTe/NiSe//AC device exhibits a high energy density of 33.7 Wh kg −1 at a power density of 800 W kg −1 , providing good cycling performance that retained 86.2 % of the initial capacitance at 2 A g −1 after 5000 cycles. All of the results illustrate that the NiTe/NiSe electrode is promising for potential application in supercapacitors and other fields.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 19
·3643-3650
·
IF 4.59
Yadong Li,Baojin Chen,Huaming Zhang,Jing Gao,Huachuan Sun,Aziz Habibi-Yangjeh,Chundong Wang
Graphical Dual purpose : A FeOOH@NiTe hybrid nanorod arrays on Ni foam was synthesized as electrocatalyst for the oxygen evolution reaction, exhibiting excellent OER activity and long-term stability. The synthesized NiTe@FeOOH/NF also shows enhanced catalytic performance for the urea oxidation reaction. Hydrogen is the most promising alternative energy source in the face of energy crisis, and water splitting is a green strategy for hydrogen generation. The oxygen evolution reaction (OER) is the essential half-reaction in electrochemical water splitting, and thus development and exploration of electrocatalysts with excellent performance are vital to prompt the application of OER. Due to the unique electronic properties of NiTe and strong synergistic interaction between NiTe and FeOOH, NiTe@FeOOH hybrid nanorods were successfully fabricated on Ni foams (NF) by a hydrothermal reaction step and another in-situ growth step for the first time without consuming any extra energy. The 3D structure of the NiTe@FeOOH/NF was confirmed by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive spectrometry (EDS) mapping technologies. Electrochemical measurements showed that the as-prepared NiTe@FeOOH/NF needs only an overpotential of 241 mV to achieve a current density of 10 mA cm −2 in 1.0 M KOH and requires 1.341 V to drive 10 mA cm −2 in 1 M KOH with a 0.33 M urea, showing excellent long-term stability. The NiTe@FeOOH/NF as the bifunctional electrocatalyst in an electrolyzer shows high efficiency with a cell voltage of 1.50 V at 10 mA cm −2 . This work can provide a new efficient method to construct highly active and cost-effective OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Xueling Wei,Xiangyu Zou,Qiguan Wang,Qiannan Liang,Youjun Huang,Taotao Ai,Wenhu Li,Linlin Dang,Sumin Wang
An in-situ prepared crassula perforata structure composing of Ni 3 S 2 nanosheets strung by NiTe nanorods at nickel foam (Ni 3 S 2 /NiTe/NF) is well-designed for seawater electrolysis. The crassula perforata structure provides more exposed Ni 3 S 2 /NiTe interfaces, and the gaps between Ni 3 S 2 nanosheets can accommodate the electrolyte solution, which not only boosts the electrolyte immersion/diffusion but induces strong electron transfer from NiTe to Ni 3 S 2 , to weaken the covalency of NiTe and lower the electronegativity of Ni 3 S 2 . Thus, during oxygen revolution reaction, the S species can be oxidized into sulfate layer and Ni species are transformed into nickel (oxy)hydroxides, with tailored d-band center and smoothed absorption/desorption of oxygen intermediates. Importantly, the in-situ generated sulfates play a crucial role in suppressing chloride corrosion. In addition, the gaps between Ni 3 S 2 sheets provide enough space for the structural change of materials during water splitting, thus improving the catalytic stability. The Ni 3 S 2 /NiTe/NF (+, −) electrolyzer only needs 2.1 V to drive a current density of 1.0 A cm −2 for 100 h in 6 M KOH mixed seawater at 60 °C. In this work, the synthesis of crassula perforata structured Ni 3 S 2 /NiTe/NF electrode provides a novel approach for the development of highly efficient and robust catalysts for industrial seawater electrolysis.
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 EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Sheng-Jin He,Ling-Feng Su,Chuang-Tian Zhan,Xiu-Bin Chen,Wei-Ming Guo,Shi-Kuan Sun,Li-Xiang Wu,Jia-Xiang Xue,Hua-Tay Lin
Low-temperature joining of SiC ceramics using raw CaO-Al 2 O 3 -MgO-SiO 2 mixed powders (CAMS-P) and CaO-Al 2 O 3 -MgO-SiO 2 glass (CAMS-G) as additives for the liquid-phase sintering of SiC nanopowders (NITE phase) in combination with surface oxidation was studied. Using CAMS-P as an additive for SiC joining required 1650 °C and produced a lower shear strength of 77.2 ± 3.5 MPa, compared to untreated SiC (108.2 ± 15.8 MPa). Using CAMS-G as an additive, the compactness of SiC joints obtained at 1550 °C was higher than that of NITE joints obtained at 1650 °C with CAMS-P as an additive. Nonetheless, the low joining temperature resulted in gaps and delaminations at the interface, and the joints strength was only 48.3 ± 5.6 MPa. Incorporating CAMS-G as an additive and surface oxidation achieved reliable NITE phase joining at 1550 °C, with no observed gaps or delaminations at the interface. The resulting joints strength was as high as 100.0 ± 0.8 MPa. The joining mechanism was discussed and compared, involving microstructural analysis .
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
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Beirong Ye,Shuhao Xiao,Xianjun Cao,Junsong Chen,Aijun Zhou,Qiang Zhao,Wen Huang,Jinshu Wang
Interface engineering of electro-active materials for supercapacitor (SC) is an effective strategy to adjust their corresponding physic-chemical properties. In this article, the core/shell structured NiTe@NiCoSe 2 composite with a 3D hierarchical architecture has been reasonably defined by coating large theoretical capacity NiCoSe 2 on NiTe nanorods using a simple hydrothermal method followed by electrodeposition process. Density functional theory (DFT) calculations indicate that the NiTe@NiCoSe 2 sample has an enhanced density of state (DOS) near the Fermi level , which provide additional theoretical assistance for the improved electrochemical performance. Thanks to the well-designed core/shell architecture and high-efficient synergistic effects among multi-components, the prepared NiTe@NiCoSe 2 electrode exhibits excellent energy storage capability. In addition, the NiTe@NiCoSe 2 //AC asymmetric supercapacitor (ASC) delivers a maximum energy density of 59.8 Wh kg −1 at 800 W kg −1 . Importantly, the outstanding durableness with 96.6% capacitance retention after 10000 cycles manifests the good stability of the core/shell structure of the NiTe@NiCoSe 2 electrode. These superior electrochemical performances show that the current composite materials are comparable to the most Se/Te-based electrodes for supercapacitors .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Beirong Ye,Miaoliang Huang,Si Jiang,Leqing Fan,Jianming Lin,Jihuai Wu
In this paper, Se-doped NiTe electrode materials for supercapacitor are synthesized through a one-step hydrothermal method by using Ni foam as Ni source and substrate. The as-obtained Se-doped NiTe electrode exhibits maximum specific capacitance of 998.2 F g −1 at the current density of 1 A g −1 , which is better than the value of NiTe electrode 603.6 F g −1 . Moreover, the Se-doped NiTe electrode assembled with AC electrode to form an asymmetric supercapacitor (ASC), which can extend the potential window to 1.6 V, and possesses of a superior energy density and power density of 42.7 Wh kg −1 and 800.6 W kg −1 at the current density of 1 A g −1 , respectively. In addition, the ASC shows an outstanding cycling stability (76.4% retained after 10,000 cycles).
研究领域:
材料科学
·
电化学
✓ 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）