ACS Applied Materials & Interfaces
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2025
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IF 8.2
Zhanhe Liu,Zirui Liu,Kechao Zhou,Zihang Chen,Kaihua Shi,Xinyu Wang,Chaoqun Peng,Richu Wang,Shlomo Magdassi,Jin He,Xiaofeng Wang
The additive manufacturing of hardmetals has attracted great attention recently but faces significant challenges in low printing resolution and low mechanical strength. Herein, the fabrication of hardmetal parts with complex structures and high surface quality by vat photopolymerization assisted with a sintering process has been achieved. This was enabled by in situ polymerization-induced microencapsulation of WC powder, which simultaneously enhances the photocuring ability and sedimentation stability of the WC-Co slurry. The WC powder is microencapsulated by a polystyrene (PS, WC@PS) coating with a thickness of ∼20 nm. The curing depth of the WC-Co slurry with WC@PS was dramatically increased from 32 to 336 μm compared to the slurry with original WC, exhibiting an average increment of 650%. The 3D-printed hardmetal parts exhibited a relative density of 99.5%, a Rockwell hardness of 86.9 HRA, and a surface roughness Ra of 2.26 μm, approaching the theoretical limits in classical powder metallurgy-derived WC-Co hardmetal parts. With high density and hardness, it is shown that a printed drilling bit can easily drill through metal sheets. This work paves a path for the vat photopolymerization 3D printing of miniature complex hardmetal components combined with high surface quality and high performance.
研究领域:
材料科学
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增材制造
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表面工程
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DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2020
·Vol. 104
·期 6
·2860-2867
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IF 3.502
Da-Wang Tan,Zhen-Yong Lao,Zhan Zhang,Wei-Ming Guo,Shi-Kuan Sun,Hua-Tay Lin
B 4 C-TiB 2 ceramics (TiB 2 ranging 5~70 vol%) with Mo-Co-WC as the sintering additive were prepared by spark plasma sintering. In comparison with B 4 C-TiB 2 without additive, the enhanced densification was evident in the sintered specimen with Mo-Co-WC additive. Core-rim structured grain was observed around TiB 2 grains. The interface of the rim between TiB 2 and B 4 C phases demonstrated different feature: the inner borderline of the rim exhibited a smooth feature, whereas a sharp curved grain boundary was observed between the rim and the B 4 C grain. The formation mechanism is discussed: the epitaxial growth of (Ti,Mo,W)B 2 rim around the TiB 2 core may occur as a result of the solid solution and dissolution-precipitation between TiB 2 phase and the sintering additive. It was revealed that the fracture toughness increased as the content of TiB 2 content increased, alongside the decreased hardness. B 4 C-30 vol% TiB 2 specimen demonstrated the optimal combination of mechanical properties, reaching Vickers hardness of 24.3 GPa and fracture toughness of 3.33 MPa·m 1/2 .
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
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IF 5.8
Zhouxi Tan,Mingkang Zhang,Shuai Zhao,Yihua Huang,Zhengren Huang
Low strength and poor performance of SiC–WC composite for seals, attributable to the use of a large amount of liquid phase sintering additives, limit the application prospects of these materials. This study focuses on preparing high-strength, high-toughness, and wear-resistant SiC–WC composite using a small amount of aluminum and carbon black as sintering additives. The results revealed that the specimen containing 50 wt% WC exhibited the maximum flexural strength and fracture toughness of 645.9 MPa and 7.49 Mpa m 1/2 , respectively. These improvements were attributed to the deoxidizing and solid-solution effects of Al and the reinforcing effect of the WC second phase. Moreover, the specific wear rate was measured at 8.06 × 10 −7 mm 3 N −1 m −1 , which was 56.9 % lower than that of monolithic SiC. Results from Raman spectral analysis provided evidence of the presence of W–O bonds on the wear surface, indicating that the SiO 2 film could be successfully replaced by a WO 3 film.
研究领域:
材料科学
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机械工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wanhong Yu,Guifang Li,Changwan Sun,Jianquan Zhang,Li Yang,Yichun Zhou
In this paper, we propose an effective method for doping WC into Ta-Hf-C ceramics to significantly enhance their densification and mechanical properties. An increasing WC doping amount from 0 to 20 at.%, enhances the densification of Ta-Hf-C ceramics from 92.4 % to 99.1 %. This is mainly due to the fact that the doping of WC effectively removes the harmful oxygen impurities from the ceramics, thereby increasing their sintering activity. Furthermore, the doping of WC plays an active role in the mechanical properties of the ceramics. The Ta-Hf-C doped with 15 at.% WC has the highest value of 36.41 GPa for nano-hardness due to the solid solution strengthening mechanism, while the highest Vickers hardness (38.75 GPa) and fracture toughness (3.76 MPa m 1/2 ) appear in Ta-Hf-C doped with 20 at.% WC. The main toughness mechanism is W segregation at the grain boundary, enhancing grain boundary strength .
研究领域:
材料科学
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力学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2020
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IF 3.407
Youhong Sun,Jinhao Wu,Linkai He,Baochang Liu,Chi Zhang,Qingnan Meng,Xuliang Zhang
Diamond/WC-Fe-Ni composite is a potential composition for impregnated diamond drill bits. It is necessary to avoid the graphitization of the diamond from Fe and Ni under the powder metallurgy process. Boron carbide (B 4 C) was coated on diamond, and diamond/WC-Fe-Ni composites were consolidated by hot pressing at different temperatures. The influences of sintering temperature and interfacial structure on bending strength and wear behavior were investigated. The bending strength for diamond/WC-Fe-Ni composite was dependent on matrix densification and interfacial graphitization. Un-coated diamond was eroded by Fe-Ni matrix and partially converted to graphite during the sintering process at all sintering temperatures. In opposite, B 4 C coating was beneficial to matrix densification at a lower sintering temperature, and delayed the appearance of graphitization to around 1300 °C. Therefore, the diamond/WC-Fe-Ni composites with B 4 C coating exhibited larger bending strength and better wear behavior at a relative low sintering temperature.
研究领域:
材料科学
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矿物工程
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Qingyun He,Shanxi Gong,Qinghua Liang,Zhifeng Liu,Binbin Shao,Ting Wu,Yuan Pan,Xiansheng Zhang,Miao He,Lin Ge,Jingwen Sun
A novel Schottky heterojunction was obtained by co-calcining fish-scale tubular carbon nitride (FTCN), V-BiOIO 3 and Tungsten carbide (WC) for photocatalytic degradation of tetracycline hydrochloride (TCH). The novel Schottky heterojunction has been analyzed by several characterizations and experiments. The case of photocatalytic degradation was studied for different initial concentrations, electrolyte and pH, respectively. The experiments have indicated that the V-BiOIO 3 /g-C 3 N 4 /WC performed an excellent activity of photocatalytic for TCH degradation (89.0%). In the mechanism analysis, we first deduce that the V-BiO3/FTCN compound belongs to the S-scheme heterojunction photocatalysts based on the properties of the band gap structure, which can effectively suppress recombination of joint carriers. Secondly, the introduction of the cocatalyst WC formed Schottky junction, which could play a role as an electronic library to trap e − and promote the separation of photo-induced carrier and thus maximize the strong oxidation ability of h + . In addition, the introduction of WC could also significantly enhance the optical absorption properties of the composites. This research could provide a new idea for the construction of novel and efficient carbon nitride-based photocatalysts under VSL (visible light), and promote its practical application in environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2021
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IF 5.039
Hui Jin,Renjie Ji,Tiancong Dong,Shuo Liu,Fan Zhang,Lilong Zhao,Chi Ma,Baoping Cai,Yonghong Liu
Nickel-iron alloy is broadly utilized in the industrial field due to its fabulous mechanical properties. How to prepare nickel-iron alloy with better corrosion resistance more efficiently is an important concern. Based on this, the WC particles enhanced nickel-iron coatings were fabricated by jet electrodeposition (JED) at a high current density of 100A/dm 2 . It was found that increasing the deposition temperature appropriately during JED is beneficial to obtain Ni-Fe-WC coating with the higher number of hard particles. Specifically, the maximum WC particles proportion reaches 4.47 wt% at 55 °C. The electrochemical corrosion behavior of coating was measured by polarization curve and electrochemical impedance spectroscopy (EIS). The polarization curve test results displayed that the E corr positively shifted from −0.402 to −0.281 V and the i corr reduced from 25.13 to 7.05 μA/cm 2 with the increase of WC particles proportion. Meanwhile, the EIS test results exhibited that the impedance of coating enhanced from 12,720 to 59,140 Ω cm 2 . The neutral salt spray test (NSS) was used to simulate the corrosion of coating in a seawater environment. The NSS results showed that with the increase of WC particles, the corrosion products decreased gradually and the degree of corrosion decreased. The analysis showed that WC particles can help the grain growth and release the internal stress in the coating. Larger grain sizes reduces intergranular corrosion and smaller internal stress help to alleviate stress corrosion cracking. The above research can provide theoretical support for the efficient preparation of particle enhanced composite coating with strong corrosion resistance.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
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IF 4.5
Guiling Ren,Jindou Hu,Kun Wang,Anjie Liu,Zhenjiang Lu,Jing Xie,Aize Hao,Yali Cao
WC-based materials are considered as a promising alternative electrocatalyst to Pt because of its similar electronic structure to Pt at Fermi level, low cost and good corrosion resistance. However, the shortcomings of easy agglomeration of WC at high temperature and its own strong W H bond leaded to its low catalytic performance. Herein, the hybrid catalyst of WC-WP/NC was prepared by a simple melting salt-assisted simultaneous phosphorylation and carbonization strategy. Excitingly, the hydrogen evolution overpotential of WC-WP/NC is much lower than that of WC/NC and WP/NC in acidic and alkaline conditions, and the stability of WC-WP/NC is significantly better than 20% Pt/C. The excellent performance is mainly attributed to the synergistically coupling of WC and WP hybrids, the rapid transfer of interface charges has changed the electronic structure of the catalyst. Furthermore, the nitrogen doped two-dimensional porous carbon nano sheets can not only increase the conductivity of the catalyst and prevent the agglomeration of nano particles, but also effectively promote the contact between electrolyte and catalyst, accelerating the HER (Hydrogen Evolution Reaction) kinetic reaction. This work provides an effective strategy for constructing a good dispersive multi-interface hybrid catalyst.
研究领域:
材料科学
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电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2023
·
IF 3.6
Dang Xu,Bangzheng Wei,Ruizhi Chen,Rui Zhou,Jian Yang,Pengqi Chen,Jigui Cheng
WC reinforced W Cu composites have excellent wear resistance and high-temperature strength , and can replace conventional W Cu composites in special applications. In this work, W Cu composites with WC@W core-shell structure are fabricated through a novel microwave-heating salt-bath carbonization (MSC) and infiltration method, using graphite as the carbon source. The MSC behavior of W particles and the influence of the graphite content on the microstructure and properties of the W Cu composites are investigated. The results show that WC is successfully coated on the surface of W particles by the MSC method. The addition of an appropriate amount of graphite to W powders can improve the high-temperature mechanical properties and wear resistance of the W Cu composites. Compared with conventional W Cu composites, the W Cu composites with 0.9 wt% graphite have higher thermal conductivity (245 W/(m·K)), higher hardness (293.8 HV), higher bending strength (1089.4 MPa), and higher compressive strength (410 MPa| 600 °C ). The addition of graphite also significantly improved the wear resistance of the W Cu composites. The average coefficient of friction (CoF) and wear rates (WR) of WCu9 composites are 0.51 and 5.37 × 10 −6 mm 3 N −1 m −1 , respectively. The WC reinforced W Cu composites prepared in this work provide an excellent approach to improve the wear resistance and high-temperature properties of guide plates in guide devices.
研究领域:
材料科学
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机械工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Kuang Sheng,Guang Li,Min Liu,Lei Gan,Shiqi Huang,Jie Li
Optimizing the accessibility and chemical microenvironment of Pt single atoms (SAs) is essential for enhancing the efficiency of hydrogen evolution reaction (HER). Herein, we present a hierarchical catalyst (Pt 3 /WC/HS) featuring highly accessible Pt SAs moderately coordinated with WC nanoparticles and uniformly anchored on monodisperse porous carbon nanospheres. With a Pt content of 2.8 wt%, Pt 3 /WC/HS achieves an ultralow overpotential of 8 mV at 10 mA cm −2 , outperforming commercial 20 wt% Pt/C. Additionally, the catalyst exhibits outstanding HER activity in proton exchange membrane water electrolyzers (PEMWE), simulated seawater, and neutral media. Notably, in a coal-assisted hydrogen production system that decouples oxygen evolution reaction (OER) from HER, Pt 3 /WC/HS achieves 400 mA cm −2 at an applied potential of just 0.5 V. Spectroscopic characterizations and density functional theory (DFT) reveal that WC stabilizes the Pt SAs while retaining an active electronic configuration in the Pt 5 d z 2 orbital, shifting *H adsorption from thermodynamically unfavorable to spontaneous. Moreover, the interconnected porous framework of Pt 3 /WC/HS ensures high Pt site accessibility at the three-phase interface. This work demonstrates a versatile and high-performance HER catalyst suitable for diverse hydrogen evolution systems and offers a rational design strategy for single-atom catalysts.
研究领域:
材料科学
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催化化学
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能源科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Keying Lin,Li Feng,Dekang Li,Jiawei Zhang,Wei Wang,Baojun Ma
It is urgent to deep understanding the electron transfer mechanism in composite co-catalyst for efficient photocatalytic H 2 evolution. Here, choosing Ru and WC as probes, (Ru/WC)/CdS and Ru/(WC/CdS) are designed. The Ru and WC show a synergistic effect in (Ru/WC)/CdS on photocatalytic H 2 evolution. The optimum (Ru/WC)/CdS shows 16.8 mmol/h/g of H 2 evolution, which are 1.93 and 1.34 times of that Ru / CdS and WC/CdS, respectively. Amazingly, the Ru / (WC/CdS) is inferior to WC/CdS, and the Ru shows harmful to WC in H 2 evolution. The role of WC and Ru in photocatalysts and the electron transfer path of composite catalysts with different assembly methods are demonstrated. This study shows the relationship between activities and transferring paths of photoexited electrons.
研究领域:
材料科学
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能源化学
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催化反应
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DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 3
·617
·
IF 4.6
Peng Zuo,Fuyan Zhao,Fanfan Liu,Jinpei Hei,Guozheng Lv,Xianzong Huang,Jun Zhang,Meng Zhang,Yefeng Liu,Tao Ma
A novel tungsten-based heterojunction nanocomposite material was developed for the efficient oxidative desulfurization (ODS) of fuel oil, enabling the production of low-sulfur fuel and a reduction in harmful SOxemissions. In this material, the WC/W2C heterojunction was uniformly immobilized on a porous nitrogen-doped carbon (NC) matrix structure through facile in situ pyrolysis of polyaniline–phosphotungstic acid (PANI/PTA) precursors. The resultant WC/W2C@NC catalyst demonstrated remarkable desulfurization performance, achieving 100% removal of 4000 ppm dibenzothiophene (DBT) in just 15 min at 60 °C in the presence of 0.03 g of WC/W2C@NC and a H2O2/S molar ratio of 2. This exceptional activity is attributed to the synergistic effects stemming from the accelerated electron transfer by the NC matrix, the intricate porous network, and the abundant WC/W2C heterojunction active sites. Moreover, the in situ formation of NC around WC/W2C mitigated active site leaching, ensuring remarkable stability, with a DBT removal rate of 97.2% maintained even after eight recycling cycles. This work provides a versatile and scalable approach for fabricating tungsten-based heterojunction catalysts and highlights the potential of WC/W2C@NC as a high-performance, durable ODS catalyst, paving the way for further advancements in sustainable desulfurization technologies.
研究领域:
材料科学
·
环境科学
·
能源工程
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DOI
PubMed
高影响因子
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