Coatings
·
2026
·Vol. 16
·期 7
·853
·
IF 3.4
Lianmeng Wang,Jianke Luo,Jiang Wang,Ying Xu,Hui Dong,Yongsheng Zhu
Steel components in thermal power plants are vulnerable to severe wear and wall thinning induced by the high-velocity impact of pulverized coal, which significantly compromises their service life and structural integrity. To address this issue, a TiC-reinforced AlCoCrFeNi high-entropy alloy (HEA) composite coating was fabricated via laser cladding, aiming to substantially enhance the wear resistance of these critical components. The phase composition, microstructure, microhardness and tribological behaviors of the coatings were systematically investigated by XRD, SEM, EDS and dry sliding wear tests. Results show that both coatings possess dense microstructures and reliable metallurgical bonding with the substrate. The AlCoCrFeNi coating consists of a single BCC solid solution phase, while the TiC/AlCoCrFeNi composite coating contains a BCC phase and a TiC ceramic phase without brittle intermetallic compounds. The average microhardness of the TiC/AlCoCrFeNi composite coating was measured to be 823 HV0.3, which is 85.66% greater than that of the AlCoCrFeNi coating (443 HV0.3). Under identical wear test conditions, the AlCoCrFeNi coating exhibits a mass loss of 31.4 mg and a volumetric wear rate of 24 × 10−3mm3/min, whereas the TiC/AlCoCrFeNi composite coating exhibits a mass loss of 15.6 mg and a wear rate of 13 × 10−3mm3/min, corresponding to reductions of approximately 50.32% and 45.83%, respectively. The wear mechanism of the AlCoCrFeNi coating is dominated by severe abrasive wear coupled with adhesive wear, while the addition of TiC converts the wear mechanism into mild abrasive wear and oxidative wear. The incorporation of TiC particles effectively enhances the microhardness and reduces the mass loss, thereby contributing to a marked improvement in the wear properties of the laser-clad AlCoCrFeNi coating. This research provides experimental data and theoretical support for the engineering application of TiC/AlCoCrFeNi composite coatings on wear-resistant components in thermal power units.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 2
·e70564
·
IF 3.8
Xizhao Chen,Yan Sun,Yingjie Li,Wei Peng,Ji Zou,Jingjing Xie,Weimin Wang,Zhengyi Fu
A synergistic enhancement in bending strength, hardness, and fracture toughness while maintaining low density in B 4 C ceramics remains a challenge. Herein, we propose to design a simple three-layer symmetrical sandwich-type laminated structure of B 4 C-TiB 2 by imitating the nacre's structure, which effectively minimizes interfacial defects and achieves stronger interfacial bonding via reactive sintering using B 4 C, TiC, and B as starting materials. The simple symmetric design generates residual compressive stress in both outer layers and tensile stress in the middle layer. It has been found that the residual compressive stress can counteract external loads and lead to a remarkable improvement in hardness and bending strength. Furthermore, a rising R-curve behavior is observed in the fracture toughness testing of laminated B 4 C-TiB 2 ceramics, indicating superior resistance to crack propagation. Compared to monolithic ceramics, the as-synthesized laminated B 4 C-TiB 2 ceramic exhibits amazing comprehensive properties with a high hardness of 37.1 ± 0.4 GPa, bending strength of 834.3 ± 62.8 MPa, and fracture toughness of 5.0 MPa·m 1/2 . This work provides precise guidance for the design of impact-resistant ceramics by offering an in-depth understanding of how residual compressive stress affects mechanical properties.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ya-Qi Zhao,Ying Wang,You-Jin Zheng,Li-Zhi Peng,Li-Juan Wang,Fang-Biao Wang
The mechanical properties of titanium carbide (TiC) ceramics are limited by poor densification during sintering and their intrinsic brittleness. In this study, 5 wt% Al was introduced as a sintering aid, and 10 wt% cubic boron nitride (cBN) was added to fabricate TiC-based ceramic composites via high-pressure high-temperature (HPHT) sintering. The microstructure and mechanical properties were systematically investigated. The composites sintered at 4 GPa and 1400 ℃ exhibited optimal properties, with a Vickers hardness of 37.43 GPa and a fracture toughness of 11.41 MPa·m 1/2 , representing increases of 69% and 132% compared with monolithic TiC, respectively. Microstructural analysis shows that Al promotes densification by enhancing interparticle bonding, while cBN participates in interfacial reactions under HPHT conditions, leading to formation of rod-like TiB 2 phases distributed along grain boundaries. The results demonstrate that the synergistic effect of Al-assisted densification and cBN-induced TiB 2 formation governs the microstructure evolution and mechanical performance of TiC-based ceramic composites, providing a feasible strategy for designing high-performance TiC-based ceramic.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 47
·期 2
·118810
·
IF 6.3
Meicen Fan,Weiwei Xiao,Shile Chen,Yao Han,Yanhao Dong,Chang-An Wang
The advancement of flash sintering (FS) for insulating ceramics, such as Al 2 O 3 , has long been stifled by a persistent thermal-mechanical instability paradox: the extreme electric fields required for initiation inevitably trigger localized Joule heating and runaway densification, culminating in catastrophic structural failure. Herein, we report a DC electric field-assisted sintering paradigm that successfully decouples the beneficial electronic activation of a flash event from its destructive densification kinetics. By architecting a percolative TiC conductive skeleton, we lower the flash initiation threshold to an unprecedented 50 V·cm −1 . Crucially, an immediate transition to a current-controlled regime post-initiation effectively mitigates thermal runaway while sustaining a non-equilibrium, flash-activated state. This state, characterized by a dramatic surge in oxygen vacancies (
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Sadegh Ghorbanzadeh,Wei Zhang,Zeinab Sanaee,Somayeh Mohammadi
The synthesis of MXenes with high surface area and porosity remains challenging due to reliance on aggressive etchants and delamination step. This work reports a mild and straightforward strategy to synthesize Ti 3 C 2 and Ti 2 C MXenes using a nano-platelet MAX phase precursor prepared via anisotropic molten salt synthesis. This precursor’s unique architecture—featuring a 15× higher surface area and 5× greater pore volume than conventional MAX phases—enables efficient Al removal with dilute hydrofluoric acid (4% HF), eliminating the need for delamination agents or post-etching processing. These MXenes achieve a high specific surface area of 105m 2/g and pore volume of 0.11c m3/g, representing 5- and 3-fold improvements over conventional MXenes. Notably, this work demonstrates the first investigation of MAX phase photothermal properties and establishes a new synthesis paradigm that eliminates delamination requirements while achieving record photothermal conversion efficiency (71.4% for MXene, 63.1% for MAX). The pre-engineered nanoplatelet architecture inherently prevents restacking, enabling stable performance for over 200 days without intercalation agents—addressing a critical limitation in MXene shelf-life and practical applicability.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 7
·118142
·
IF 6.2
Mengwen Zhang,Fanyu Meng,Na Cao,Lei Fan,Shoulei Yang
High-performance Al₂O₃-Ti(C,N) composites are critical for extreme-environment applications, yet conventional static sintering cannot simultaneously achieve full densification and strong grain-boundary bonding. Here, a dynamic sinter forging (DSF) strategy coupling sintering densification and oscillatory forging deformation was developed to activate plastic flow and defect engineering. Composites were sintered at 1600 °C with oscillatory amplitudes of 0–40 MPa (5 Hz) and a maximum pressure of 80 MPa. The flexural strength increased from 583 MPa under a pressure of 80 ± 0 MPa to 1070 MPa under 40 ± 40 MPa, representing an 83 % enhancement. TEM revealed increased dislocation densities in Al₂O₃ (2.6 ×10⁵→2.9 ×10⁶ cm⁻²) and Ti(C,N) (4.8 ×10⁶→8.2 ×10⁶ cm⁻²) and curved interfaces, shifting fracture from intergranular to transgranular, showing that defect generation and interface curvature jointly strengthen the composites. This DSF route enables concurrent densification and microstructural strengthening within a single thermal cycle, offering a general pathway to high-toughness oxide–carbonitride ceramics.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Yisha Huang,Shuqi Yu,Ji Zhou,Chaoling Wu,Yun Zhang,Yao Wang
The development of stable and efficient alkaline hydrogen oxidation reaction (HOR) electrocatalysts is critical for advancing alkaline exchange membrane fuel cells. Ruthenium (Ru) shows promise as a HOR catalyst with cost advantages over platinum (Pt) but suffers from low intrinsic activity and oxidation vulnerability. Herein, we combine lattice-matched epitaxial growth with active metal carrier interaction (RMSI). For the first time, a simple impregnation-annealing method was employed to achieve lattice-matched epitaxial growth between Ru nanoparticles and titanium carbide (TiC) during deposition on the TiC surface, providing an efficient and stable interfacial structure for the RMSI. RMSI promotes electron transfer from TiC to Ru, modulates Ru’s electronic structure, and optimizes its hydrogen adsorption Gibbs free energy (△GH*). Experimental data and density functional theory (DFT) calculations confirm that the synergy between the epitaxial structure and RMSI significantly enhances the alkaline HOR activity. Consequently, the Ru/TiC-200 catalyst exhibits a higher kinetic current density than Pt/C, with a performance 5.31 times that of Ru/C.
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高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 25
·255602
·
IF 3.5
Chenji Xia,Yijia Luo,Xiaoqing Bin,Bowen Gao,Wenxiu Que
Combining the new two-dimensional conductive MXene with transition metal oxide to build composite structure is a promising path to improve the conductivity of metal oxide. However, a critical challenge still remains in how to achieve a good combination of MXene and metal oxide. Herein, we develop a facile hydrothermal route to synthesize the MnO2/Ti3C2Tx composite electrode for supercapacitors by synergistically coupling MnO2 nanowires with Ti3C2Tx MXene nanoflakes. Compared with the pure MnO2 electrode, the morphology of the MnO2/Ti3C2Tx composite electrode changes from nanowires to nanoflowers. Moreover, the overall conductivity and electrochemical performance of the composite electrode are greatly improved due to an addition of Ti3C2Tx MXene. The specific capacitance of the MnO2/Ti3C2Tx composite electrode achieves 210.8 F·g−1 at a scan rate of 2 mV·s−1, while that of the pure MnO2 electrode is only 55.2 F·g−1. Furthermore, the specific capacitance of the MnO2/Ti3C2Tx composite electrode still can remain at 97.2% even after 10 000 charge–discharge cycles, revealing an excellent cycle stability. The synthesis strategy of this work can pave the way for the research and practical application of the electrode materials for supercapacitors.
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PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 2
·1-15
·
IF 20.1
Miao Baoji,Cao Yange,Zhu Qingsong,Nawaz Muhammad Asif,Ordiozola Jose Antonio,Reina Tomas Ramirez,Bai Zhiming,Ren Junna,Wei Fengchun
The signal crosstalk and electromagnetic interference (EMI) problems direly need to be resolved in the rapid development of modern microwave communication technology for a better working frequency and transmission power of electronic systems. Where the new absorbing materials such as molybdenum disulfide (MoS 2 )/titania (TiO 2 )/Ti 2 CT x and MoS 2 /Ti 2 CT x composites could meet the requirement of “thin, strong, light weight, and wide band” for excellent absorbing performance. In this work, a lighter Ti 2 CT x material was selected as the matrix, and MoS 2 was in-situ grown on Ti 2 CT x matrix by traditional hydrothermal method and microwave solvothermal method. The fabricated composite exhibited synergic effect of two-dimensional heterostructural interface and double dielectric elements, where a small amount of TiO 2 and a certain proportion of MoS 2 jointly improve the impedance matching of the composite material. In here, the extreme reflection loss (RL min ) can reach − 54.70 dB (with a frequency of 7.59 GHz, 3.39 mm thickness), and the maximum effective absorption bandwidth (EAB max ) can reach 4 GHz. Polyethylene glycol 200 was used as the solvent instead of water to make Ti 2 CT x less oxidized during the composite process, where the microwave heating would attain fast speed, short time, high efficiency, and uniform product. Since, the MoS 2 /Ti 2 CT x composite without oxidizing possessed a wider effective absorption bandwidth (EAB) at a thinner thickness, thus resulting in the excellent microwave absorption performance and confirming the validity and rationality of new microwave absorption materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xin Zhang,Yukai Lin,Lingchao Zhang,Zhenguo Huang,Limei Yang,Zhenglong Li,Yaxiong Yang,Mingxia Gao,Wenping Sun,Hongge Pan,Yongfeng Liu
Sodium alanate, NaAlH 4 , has great potential as a hydrogen carrier but suffers from sluggish kinetics and poor reversibility caused by high energy barriers. Transition metal-based catalysts are especially effective in reducing kinetic energy barriers for hydrogen cycling of NaAlH 4 . Herein, we demonstrate a facile fabrication of TiC nanoparticles with 2–4 nm in size supported on carbon (nano-TiC@C). The resultant product consists of approximately 49.2 wt% of TiC and 50.8 wt% of C, and exhibits high and stable catalytic activity for hydrogen storage process of NaAlH 4 . The 7 wt% nano-TiC@C-containing NaAlH 4 releases 5 wt% H 2 starting from 65 °C and reabsorbs all released hydrogen at 30 °C under 100 bar H 2 , outperforming NaAlH 4 modified by commercial TiC nanoparticles (∼50 nm in size). The enhancement is related to the ultrasmall size and high reactive activity of as-synthesized TiC nanoparticles. Moreover, the weak electronegativity of C prevents the formation of Na-based by-products, which are often observed in oxide and halide-containing systems. This finding sheds light on how to design and synthesize high-performance catalytic additives for light-metal hydride-based hydrogen storage materials.
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高影响因子
Chem
·
2023
·
IF 23.5
Qiushi Ruan,Xufeng Xi,Bingzhen Yan,Lingqiao Kong,Chaoran Jiang,Junwang Tang,ZhengMing Sun
Considering the intermittent solar energy availability, storing excess photon energy for subsequent use in dark represents a decoupled solar energy utilization strategy, resembling the dark reduction process in natural photosynthesis. Multi-electron accumulation is key to such dark photosynthesis. However, accompanied by energy loss of stored photoelectrons, dark hydrogen generation suffers from low efficiency. Here, we demonstrate the efficient release of hydrogen from methanol reforming in the dark over a TiO x /CN faradaic junction. Under irradiation, photoelectrons generated from polymeric carbon nitride (CN) were stored in an electron pool at the TiO x /CN interface with negligible energy loss via a quasi-isoenergetic process. Those stored photoelectrons slowly release active electrons for proton reduction, resulting in decoupled hydrogen generation in the dark. This storing process describes accumulation and gradual release of photoelectrons in a faradaic junction, which enables the on-demand utilization of solar energy for hydrogen generation, thereby alleviating the mismatch between solar hydrogen demand and sunlight availability.
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高影响因子
Journal of the Australian Ceramic Society
·
2023
·Vol. 59
·期 5
·1231-1239
·
IF 1.9
Zhang Mengwen,Jiang Binyang,Yang Lutong,Cao Na,Li Zhaosheng,Fan Lei,Yang Shoulei
The emerging oscillatory pressure sintering technology is used to prepare high-performance Al 2 O 3 -Ti(C,N) ceramic tools for high-speed cutting. By recording the displacement during sintering, the sintering shrinkage rate of the Al 2 O 3 -Ti(C,N) composite was calculated, and the stress exponent n and sintering activation energy Q were calculated according to creep theory to determine the densification mechanism. In addition, the evolution of phases, microstructure and hardness of the composite was also observed. Results show that during oscillatory pressure sintering process at 1400 °C and 1300 °C, the stress exponent of Al 2 O 3 -Ti(C,N) composite is around 2.2 and the sintering activation energy is 486 kJ mol −1 , indicating that the densification mechanism is a diffusion-controlled grain boundary sliding of Al 2 O 3 phase. Additionally, as the oscillatory pressure increases, the average grain size of the Al 2 O 3 decreases and the Vickers hardness increases. Hardness achieves the highest 22.7 GPa when the median oscillatory pressure is 70 MPa at 1400 °C, which is 1 GPa higher than that of static pressure of 70 MPa.
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高影响因子
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