CERAMICS INTERNATIONAL
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2021
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IF 4.527
Bin Han,Shigen Zhu,Weiwei Dong,Yunfeng Bai,Hao Ding,Yilan Luo,Ping Di
(85-x)WC–15 wt%Al 2 O 3 –xTiC (x = 0, 1.5, 2.5, 5, 10, and 20 wt%) composites were prepared by vacuum hot-press sintering. The influence of TiC addition on the corrosion behaviour of WC–Al 2 O 3 composites in 0.1 M NaOH solution was revealed. The results suggest that all the samples containing added TiC had the TiC phase and (W, Ti) C solid-solution phase, while the base composite had neither phase. With increasing added TiC content, the average grain size of WC decreased, and the relative density first increased and then decreased. Furthermore, the results suggest that the addition of TiC could noticeably increase the free corrosion potential and impedance and reduce the corrosion current density. However, the composite containing 20 wt% added TiC showed the opposite trend. Therefore, it can be concluded that the corrosion performance of the composites in an alkaline medium can be improved by adding an appropriate amount of TiC. The change in corrosion properties was caused by changes in the solid-solution phase, relative density, and TiO 2 oxide film .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
POWDER METALLURGY
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2024
·
IF 1.9
Xiao-Chun Deng,Guo-Hua Zhang
The WC-10Co cemented carbides containing (ZrHfNbTaTiMo)C high-entropy carbide with satisfactory comprehensive mechanical properties were successfully manufactured by conventional vacuum sintering. The influences of (ZrHfNbTaTiMo)C contents (0, 0.5, 1, 5, 10 wt.%) on the densification degree, microstructure, grain size and mechanical properties were investigated. The results showed that the addition of (ZrHfNbTaTiMo)C deteriorated the wettability between Co and WC, leading to a decline in relative density. (ZrHfNbTaTiMo)C inhibited the growth of WC grains, and the average grain size of WC continued to decrease with the increase of (ZrHfNbTaTiMo)C content. After adding (ZrHfNbTaTiMo)C, the hardness and toughness rose first and then descended. When the content of (ZrHfNbTaTiMo)C was 1 wt.%, the hardness and toughness reached the maximum value of 16.77 GPa and 10.45 MPa·m1/2, respectively. Moreover, the structure was a dual-grain structure, with many high-aspect-ratio rectangular grains in the sintered samples added by 0.5 wt.% and 1 wt.% (ZrHfNbTaTiMo)C. This special structure not only enhanced the hardness, but also compensated the loss of toughness. After doping 0.5 wt.% CeO2, the hardness decreased slightly, while the toughness increased to 12.42%.
研究领域:
材料科学
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机械工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Tao Ding,Mengxiang Zhu,Linghui Yan,Zhengyang Liu,Pin Zhou,Guosheng Shi,Dongting Yue
The unreasonable disposition of tungsten waste not only causes serious environmental contamination, but also leads to the metals resource wastage. A sustainable approach was proposed to obtain the Fenton-like catalyst derived from tungsten waste, which exhibits high efficiency for peroxymonosulfate (PMS) activation. The recovered WC@Co, as a Fenton-like catalyst, was fabricated via thermal treatment of machining wet tungsten sludge, which induces the phase separation of Co and increases Co loading on WC. The formed Co 0 as the electron-donor can not only facilitate the electron transform to W 6+ , but also active PMS for reactive species, thereby contributing to the enhanced generation of SO 4 – , OH, O 2 − and 1 O 2 . Moreover, the high-valent Co(IV) was also generated in WC@Co/PMS system. These radical and nonradical pathways for reactive species make WC@Co/PMS system high oxidation capacity and stability for persistent organic pollutants degradation. Thus our proposed strategy has successfully realized recycling of metals such as W and Co for environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2021
·
IF 6.707
Jinyan Cao,Yue Jing,Zhongxing Du,Wei Chu,Jianjun Li,Wanglai Cen
A novel n-n type WC/BiOCl binary photocatalyst was synthesized, and applied to sulfamethoxazole (SMX) degradation. The physical and photoelectric properties of the WC/BiOCl were characterized by various experimental and calculational methods. An intimate interfacial contact between WC and BiOCl was identified, which help to reduce the aggregation of BiOCl and more importantly, build an internal electrical field between WC and BiOCl. It is interesting to find that the WC layer(s) can help to reduce the interfacial charge transfer resistance and act as electron transfer and storage sites. Subsequently, the holes are engaged in the oxidation of SMX by WC/BiOCl. Additionally, WC/BiOCl photocatalyst has more reactive sites and absorbs more incident photons compared with pure BiOCl. Quenching and electron spin resonance (ESR) experiments indicate that O 2 ·- is the main active species, holes and OH • are also involved. The degradation pathway of SMX and the enhancing mechanism for the photodegradation through the combination of WC and BiOCl were explored. This work provides a novel binary photocatalyst for SMX degradation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Xiaodi Zhang,Jiming Wang,Guojie Zhang,Jun Liu,Ying Wang,Yuqing Zhao,Guoqiang Li
To improve the DRM reaction performance of the catalysts, a series of Co–Ni/WC-AC catalysts are prepared by impregnation using WC-AC as the support. The structural features of the fresh and spent catalysts are characterized by BET, XRD , H 2 -TPR, XPS and TG . The results show that the introduction of Ni in the 20Co/WC-AC catalyst promotes the conversion of W species to WC. Further, WC enhances the interaction between the active metal and the support. Thus, the activity and sintering resistance of Co–Ni/WC-AC catalysts are improved. It is also found that the introduction of different ratios of Ni has a significant effect on the chemical environment (oxygen environment) on the catalyst surface.10Co–10Ni/WC-AC catalysts showed high surface O α and O β contents of 26% and 53%, respectively. The catalyst shows excellent catalytic performance. The conversion of CH 4 and CO 2 is stable at about 84% and 85% at 800 °C.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Manufacturing Processes
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2024
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IF 6.1
Yongfeng Yang,Lin Zhang,Jing Liu,Mingxia Wu,Jian Liu,Yi Yang
To explore an eco-friendly approach to improve the milling performance of TC4 (Ti-6Al-4 V) alloy, pulsed magnetic field treatment and magnetofluid are simultaneously applied to the NbN-coated cemented carbide (WC–12Co) milling tools. To evaluate the coupling effect of pulsed magnetic field treatment with magnetofluid, milling experiments of TC4 were conducted under cutting fluid and magnetofluid lubrication , respectively. The milling force, tool wear, and workpiece surface quality of magnetic field treated tools were compared with those of untreated tools. When the cutting fluid was lubricated, the magnetic field treatment reduced the feed force by 8.8 %. In contrast, the magnetic field treatment reduced the feed force by 20.7 % when the magnetofluid was lubricated, which reduced tool wear and also weakened coating flaking. The coupling of the magnetic field treatment and the magnetofluid significantly improved the milling performance of the tool, reducing surface roughness by 40.9 % compared to the untreated tool with cutting fluid lubrication. The enhanced milling performance mainly results from the coupling effect of magnetic field treatment and magnetofluid, which has a strong magnetic response to the treated tool and the magnetofluid was attracted to the magnetized tool, enhancing the lubrication of the contact area. In addition, the enhanced mechanical properties (8.2 % increase in hardness, 13.1 % decrease in elastic modulus , and 4.5 % increase in thermal conductivity) resulting from the pulsed magnetic field treatment reduces the milling temperature (11.7 °C) also contribute to the enhanced milling performance.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2021
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IF 3.871
Bin Han,Shigen Zhu,Weiwei Dong,Yunfeng Bai,Hao Ding,Yilan Luo,Ping Di
In this study, 85-xWC-xTiC-15wt%Al 2 O 3 (x = 0, 5, 10 and 20 wt%) composites were fabricated via hot pressing sintering technology. The influences of TiC additives on the mechanical performance and electrochemical behavior of WC-Al 2 O 3 composite in NaCl solution were investigated. The mean size of WC grain showed a downward trend with the increase of TiC content. The relative density, hardness and fracture toughness of WC-based composites were improved by TiC additives. The maximum values of mechanical performance were obtained when TiC content was 10 wt%. Moreover, the research results indicated that TiC additives significantly increase the corrosion potential and decrease the corrosion current density in NaCl solution. When TiC content increased, the charge-change resistance (R ct ) value presented an uptrend, and then decreased obviously when the TiC content reached 20 wt%. The XPS spectrum and SEM images proved that TiO 2 passivation film was formed on the surface of WA15-10TiC composite. Therefore, it could be concluded that TiO 2 passive film could inhibit further corrosion of the composite.
研究领域:
材料科学
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腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Kai-Fei Wang,Xiao-Hui Yang,Xiao-Chun Deng,Kuo-Chih Chou,Guo-Hua Zhang
WC-12Co- x VC cemented carbides were synthesized using an in-situ synthesis method consisting of precursor formation, deoxidization and carbonization-sintering steps. The experimental results showed the mean grain size of the WC in the sintered alloys decreased from 1.05 to 0.46 and 2.13–0.57 µm, corresponding to the VC content from 0 to 2 wt% at 1350 °C and 0–6 wt% at 1400 °C. V 4 WC 5 thin-layer was generated in the final sintered sample with low VC addition. As the VC content increased to more than 2 wt%, the V 4 WC 5 with larger particles size were generated except the V 4 WC 5 thin-layer, which would effectively enhance the hardness of WC-12Co-VC cemented carbides. The fracture toughness reached the maximum value of 16.45 MPa·m 1/2 for WC-12Co-2VC sintered at 1350 °C for 2 h; while the Vickers hardness reached the maximum value of 2124 HV for WC-12Co-6VC sintered at 1400 °C for 2 h, respectively.
研究领域:
材料科学
·
机械工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Feihong Wang,Anding Huang,Chuntian Tan,Hamidreza Abadikhah,Yu Bai,Xin Xu,Kunhong Hu,Binbin Dong,Gang Wang
The development of electrodes with low cost, high stability and efficient catalytic performance is crucial for the practical application of hydrogen production by electrolyzing water. Here, we reported the preparation of a novel MoS 2 /WC ceramic electrode with a straight-through hole structure by phase-inversion tape-casting combined with hydrothermal method. The obtained MoS 2 /WC electrode achieved impressive HER performance under acidic conditions, specifically with an overpotential of only 215 mV at a current density of 500 mA cm⁻ 2 , demonstrating excellent high current density catalytic activity. Furthermore, the ceramic electrode demonstrated excellent long-term stability, operating reliably for 600 h across a current density range of 10–500 mA cm⁻ 2 . The outstanding catalytic activity and stability at high current densities are primarily attributed to the through-hole structure, which enhances mass transfer of the electrolyte and gas bubbles, along with the increased number of active sites provided by MoS 2 nanoflakes. Therefore, the prepared ceramic electrode has great potential for the development of industrial hydrogen production electrodes.
研究领域:
电化学
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材料科学
·
能量转换
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催化
·
水分解
✓ 已验证
产品关联
DOI
高影响因子
ENGINEERING FAILURE ANALYSIS
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2022
·
IF 3.634
Anhua Ren,Min Kang,Xiuqing Fu
Ni/WC-MoS 2 composite coatings were fabricated in electrolytes with different MoS 2 doping levels using jet electrodeposition. We investigated the surface characteristics of Ni/WC-MoS 2 composite coatings, including the composition, surface morphology, microhardness and tribological behaviour. We also analysed the Ni/WC-MoS 2 composite coating wear mechanism during the wear process. The outcomes determined that Ni/WC-MoS 2 coatings had better surface quality, smaller grain size and larger coating thickness than Ni/WC coatings. The doping of MoS 2 promoted the deposition of WC in the coatings, which further enhanced the microhardness of the coatings. The Ni/WC-MoS 2 composite coatings doped at a MoS 2 concentration of 5 g/L exhibited a maximal microhardness of 730 HV 0.1 . Doping by MoS 2 effectively minimized the coefficients of friction ( CoFs ) of the composite coatings to 0.3. During the wear process, the repair effect of MoS 2 and formation of oxidised friction films transformed the adhesive wear into oxidative wear assisted by abrasive wear, which improved the abrasion resistance of the coatings and diminished the wear rate. The wear rate of the Ni/WC-5 g/L MoS 2 composite coating decreased by 47.34 % in comparison with that of coatings without MoS 2 doping, which was 7.44 × 10 4 μm 3 /N∙m. The findings indicate that doping MoS 2 can effectively enhance the surface wear resistance. This research provides a practical approach to prolong the service life of metal parts.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Xiaohui Ma,Wenjun Li,Chaojun Ren,Hongda Li,Xintong Liu,Xinyang Li,Tianyu Wang,Mei Dong,Shujing Liu,Shaowei Chen
Herein, noble-metal-free In 2 S 3 -WC and In 2 S 3 -based photocatalysts with dual cocatalysts of flower-like MoS 2 and bulk WC were synthesized through a facile solvothermal reaction. Electrochemical results indicated WC increased the interface conductance of photocatalyst and boosted the transference of photogenerated carriers. The optimal In 2 S 3 -WC show a hydrogen production rate of 128.11 μmol·h −1 ·g −1 , which is around 6 times higher than In 2 S 3 -1%Pt (20.73 μmol·h −1 ·g −1 ). The above results demonstrate commercial WC has a crucial impact of replacing precious metal and separating carriers. Morphology characterization exhibited hydrangea In 2 S 3 and flower-like MoS 2 were attached to bulk WC. Gratifyingly, photocurrent, impedance and photoluminescence results demonstrated MoS 2 further effectively separated the photogenerated carriers. Remarkably, the higher hydrogen generation rate of 390.52 μmol·h −1 ·g −1 obtained by the optimal ternary In 2 S 3 -WC-MoS 2 composite was around 3 and 18 times higher than the optimal In 2 S 3 -WC and In 2 S 3 -1% Pt. The photocatalytic results demonstrated that "W-Mo auxiliary pairs" was a great efficient synergistic cocatalyst for In 2 S 3 to increase active sites and improve e - -h + pairs separation for H 2 generation. Furthermore, a probable reaction mechanism of the enhanced photocatalytic H 2 generation was also proposed. This presented research provides an effective concept to design novel and efficient noble-metal-free photocatalyst with "W-Mo auxiliary pairs" for prominent H 2 generation activity.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaohui Ma,Wenjun Li,Chaojun Ren,Hongda Li,Xinyang Li,Mei Dong,Ying Gao,Tianyu Wang,Hualei Zhou,Yanyan Li
Herein, we report the synthesis of ZnIn 2 S 4 nanoparticles on bulk WC by a facile hydrothermal process to construct novel and highly efficient noble metal-free Schottky junction heterojunction photocatalysts. Morphology characterization revealed that the ZnIn 2 S 4 nanoparticles were deposited on the surface of the WC. Meanwhile, the combination of the ZnIn 2 S 4 and the metal-like WC formed the Schottky energy barrier, which greatly promoted the migration and separation of photo-generated carriers. Especially, the optimal ZnIn 2 S 4 /WC photocatalysts have a lower overpotential for hydrogen evolution (−0.35 V) than pristine ZnIn 2 S 4 (−0.49 V). The hydrogen production ability of the optimal ZnIn 2 S 4 /WC photocatalyst (2400.3 μmol·h −1 ·g −1 ) was approximately 9.2 times higher than that of ZnIn 2 S 4 -1% Pt (260.1 μmol·h −1 ·g −1 ). Photocatalytic experiments demonstrated that metal-like WC plays an important role in replacing precious metal to increase the active site of ZnIn 2 S 4 . Moreover, a feasible Schottky junction reaction mechanism of intensive photocatalytic activity was discussed. This study proves that it is a very fascinating strategy to combine the advantages of ZnIn 2 S 4 and metal-like to construct Schottky heterojunction for photocatalytic hydrogen production.
研究领域:
材料科学
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环境科学
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能源科学
✓ 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）