MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2022
·
IF 6.044
Dezhi Wang,Dongyang He,Kai Li,Zhuangzhi Wu
The strength enhancement is critical for the application exploration of Mo-based materials. In this work, a secondary phase of WC is introduced into the Mo matrix, and the corresponding phase, microstructure and mechanical properties have been studied. It is found that the addition of WC particles can significantly improve the mechanical properties, leading to a high ultimate tensile strength (UTS) of 591.5 MPa and a hardness of 242.7 HV over the sintered Mo–12%WC composite, which are about 21.2% and 49.5% higher than those of pure Mo, respectively. During the sintering, the additive WC particles react with the Mo matrix to in-situ generate W and Mo 2 C, and the former is dissolved into the Mo matrix to exhibit solid solution strengthening. Besides, the latter hinders the migration of grain boundaries (GBs) to limit the grain growth of Mo, resulting in smaller grain size. More importantly, the Mo 2 C ( 1 ‾ 2 ‾ 1 ) can gain coherent interfaces with Mo ( 1 1 ‾ 0) to intensify the phase boundary. This work paves a way for the design of high-performance composites through the in-situ reinforcement of decomposable additives.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Rong Hu,Huiyu Jiang,Jinglin Xian,Shiyun Mi,Liyun Wei,Guangyu Fang,Jiayue Guo,Siqi Xu,Ziyang Liu,Huanyu Jin,Weilin Xu,Jun Wan
Electrocatalytic hydrogen evolution reaction (HER) is crucial to clean fuel production. Two-dimensional (2D) transition metal carbides (TMCs) are promising HER electrocatalysts by their excellent intrinsic catalytic activity. However, the synthesis of 2D TMCs requires prolonged high-temperature conditions or rigorous etching processes. Here we achieved an ultra-fast and facile synthesis of ultra-thin carbon-terminated 2D TMCs via a microwave-pulse sugar-blowing method. A series of 2D TMCs are obtained rapidly within 3 min. This method accurately adjusts carbon-layer thickness and facilitates the formation of 2D structures. Accordingly, the electrocatalytic HER activity and stability of TMCs are significantly improved. The 2D W 2 C with 1 nm carbon-layer thickness shows high HER activity and ultra-long durability (100 h) in both acidic and alkaline electrolytes. Furthermore, this microwave-pulse method is a generic synthesis strategy that is demonstrated by the successful preparation of 2D WC, Mo 2 C and MoC.
研究领域:
材料科学
·
电化学
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2026
·
IF 4.7
Yingnan Zhou,Xike Sun,Dapeng Xu,Weiwei Dong,Yunfeng Bai,Jinhui Fan,Yilan Luo,Shigen Zhu
WC–CoCrFeNi cemented carbides were fabricated using high-energy ball milling and spark plasma sintering to explore the use of CoCrFeNi as a low-cobalt binder for WC-based cemented carbides. The effects of sintering temperature (1200 °C–1350 °C) and binder content (5 wt.–20 wt%) on phase constitution, microstructure, densification, hardness, fracture toughness, and transverse rupture strength (TRS) were systematically examined. Increasing the sintering temperature improved densification but also promoted WC grain growth, resulting in reduced hardness and a non-monotonic variation in fracture toughness. Increasing the CoCrFeNi content refined WC grains and reduced porosity; however, excessive binder addition (20 wt%) reduced hardness and TRS because an increased soft-phase fraction and weakened hard-phase skeleton offset the benefits of further densification. For the composite containing 15 wt% CoCrFeNi binder, 1300 °C provided the most favorable property balance within the investigated temperature range. Among the compositions evaluated at 1300 °C, the specimen containing 15 wt% CoCrFeNi exhibited the best overall performance, with a hardness of 1883 HV 30 , a fracture toughness of 12.6 MPa·m 1/2 , and a TRS of 1416 MPa. The improved property balance is attributed to enhanced densification, restrained WC coarsening, reduced effective defect size, and more effective crack deflection. These results indicate that CoCrFeNi represents a promising low-cobalt binder design strategy for WC-based cemented carbides.
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2024
·
IF 4.7
Jiang-long YI,Han-lin LIAO,Cheng CHANG,Xing-chen YAN,Min LIU,Ke-song ZHOU
A series of nano-WC surface modified AlSi10Mg powders with different WC contentswere synthesized by the electrostatic assembly method. After the selective laser melting (SLM) processing, various Al−W intermetallicswere in-situ formed in the SLM nano-WC/AlSi10Mg composites. A well-coherent Al/Al 5 W interface with a low lattice mismatch of 4.7% was confirmed with an orientation relationship of (002) α (Al) //(104) Al5W . The nano-WC particles and Al−W intermetallics triggeredthe columnar-to-equiaxed transition, leading to a fine equiaxed microstructure. As a result, the SLMed 3 wt.% nano-WC/AlSi10Mg composites showed remarkable mechanical properties, with an ultimate tensile strength of (464.1±8.68) MPa and elongation of (5.6±0.95)%. Additionally, the SLMed 3 wt.% WC/AlSi10Mg samples also achieved the lowest average coefficient of friction (0.429) and wear rate of 3.842×10 −5 mm 3 /(N·m) compared to other WC/AlSi10Mg composites. The remarkable mechanical and wear properties are ascribed to fine-grain and second-phase strengthening.
研究领域:
材料科学
·
增材制造
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金属基复合材料
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力学性能
·
表面工程
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2021
·
IF 4.872
Yongfeng Yang,Yi Yang,Chengzhi Liao,Gang Yang,Yuan Qin,QiuQin Li,Mingxia Wu
Pulsed magnetic field treatment was applied to the cemented carbide (WC-12Co) for enhancing its friction-reducing and anti-wear effect under different friction conditions , including dry, distilled water and nano-Fe 3 O 4 particles additive friction. The results show that the friction reduction and anti-wear effect could be enhanced with pulsed magnetic field applied . Especially, with nano-Fe 3 O 4 magnetofluid lubrication , the wear volume of workpiece is reduced by 26.8% and the average friction coefficient is reduced by 12.4%. The effect of the pulsed magnetic field on tribological properties is closely related to the oxidation and remanence. It can promote oxidation and forms a protective layer on the friction pair . Furthermore, it can make magnetofluid gather and amplify the lubrication.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Weidong He,Jianpo Chen,Binjie Du,Yuhang Xiao,Xiaohong Tan,Yingying Guo,Hao Cui,Chengxin Wang
The development of cost-effective catalysts with high activity and stability over a wide pH range is urgent, but there are great challenges in the selection and design of catalyst materials. In this work, cobalt phosphide nanoparticles were modified onto tungsten carbide nanowire arrays (CoP@WC/CC) on carbon cloth substrate by a two-step method. The construction of CoP@WC heterostructure results in the downward shift of the d-band center, which optimizes the adsorption energy of catalyst and reaction intermediates. Meanwhile, the synergistic effect of CoP and WC contributes to the alkaline HER kinetic process. In addition, binder-free self-supporting nanoarray have excellent electrical conductivity, large specific surface area and strong structure, which is conducive to charge/matter exchange and catalyst stability. The results show that CoP@WC/CC can effectively drive HER over a wide pH range and exhibit better catalytic performance than the single component control sample. In 0.5 M H 2 SO 4 and 1 M KOH, CoP@WC/CC can drive the current density of 10 mA cm −2 with only 52 and 70 mV, while showing excellent stability without obvious performance degradation during 100 h of constant current test. A proton exchange membrane water electrolysis (PEMWE) using CoP@WC/CC catalyst operates stably for 200,000 s at 30 mA cm −2 . This study provides a new reference for the design and development of high efficiency, low cost and wide pH-universal hydrogen evolution electrocatalysts.
研究领域:
材料科学
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电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Ao Li,Renkai Chang,Zhidong Zhang,Jie Tang,Qipeng Liu,Bing Liu,Mengdong Ma,Qisong Li,Xiaozhe Cheng,Xiaoyan Guan,Qian Zhang,Yunchao Mu,Quan Huang
Silicon carbide (SiC) is a key structural ceramic renowned for its excellent comprehensive properties. However, its inherent brittleness often limits its service lifetime and reliability in high-wear applications. To address this issue, the present work combined the polymer-derived ceramic (PDC) route with spark plasma sintering (SPS), aiming to achieve additive-free densification of SiC-WC composites. Composite powders were prepared from liquid polycarbosilane (PCS) and nano-sized WC, and the resulting ceramics were systematically characterized. With increasing WC content, the composites exhibited synergistic improvements in hardness, fracture toughness, and tribological properties. The sample containing 50 wt% WC (SW-50) achieved a balanced set of properties, including a Vickers hardness of 22.7 ± 0.81 GPa, a fracture toughness of 6.0 ± 0.26 MPa m 1/2 , and a wear rate of 8.5 × 10 −7 mm 3 N −1 m −1 . These values represented improvements of approximately 11%, 46%, and 78%, respectively, relative to the WC-free sample (SW-0). All these findings demonstrates that the PDC-SPS process holds promising for achieving synergistic improvements in composite ceramics via microstructural regulation. This work provides a new and practical strategy for fabricating high-performance SiC-WC composites without sintering additives.
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Chengyu Xing,Shengguo Zhou,Leyin Xiao,Hao Chen,Zhixiang Wang
Cemented carbide is widely used in cutting, mining, and aerospace industries due to its exceptional hardness and wear resistance; however, its effectiveness in corrosive or high-friction environments is constrained by its limited fracture toughness and insufficient corrosion resistance. In this study, nitrogen-doped carbon quantum dots (N-CQDs) were incorporated to strengthen WC-10Co cemented carbide synthesized through the powder metallurgy route, followed by a comprehensive investigation of their structural, mechanical, electrochemical, and tribological properties. Results revealed that an optimal addition of N-CQDs promoted WC grain refinement and reduced porosity, resulting in enhanced interfacial bonding and structural uniformity in the sintered composites. The sample 1 wt.% N-CQDs demonstrated 7.4% increase in hardness (from 1355 to 1455 HV), a 25.7% enhancement in fracture toughness (from 12.32 to 15.49 MPa·m 1/2 ), a 38.4% decrease in corrosion current density, and a reduced wear rate from 4.73 × 10 -6 to 5.50 × 10 -6 mm 3 ·N -1 ·m -1 relative to the undoped counterpart. This sample displayed an evident increase in impedance modulus and a substantial reduction in wear rate, attributable to the formation of a compact passive film and a stable nano-lubricating layer. Lower N-CQDs additions yielded only minor enhancements, while excessive doping induced agglomeration and interfacial defects, ultimately decreasing the overall performance. These results demonstrate that optimal incorporation of N-CQDs offers a feasible and cost-effective strategy for improved durability and service life of WC-10Co cemented carbide under harsh service conditions.
研究领域:
材料科学
·
机械工程
·
腐蚀科学
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摩擦学
·
粉末冶金
✓ 已验证
产品关联
DOI
高影响因子
Lubricants
·
2025
·Vol. 13
·期 9
·407
·
IF 2.9
Xinbin Liu,Juangang Zhao,Tiansheng Li,Zhengbing Meng,Jinbiao Qing,Wen Xu,Youxuan Ouyang,Yuanyuan Zeng
In order to enhance the performance of 20# steel, this study successfully fabricated AlCoCrFeNi high-entropy alloy coatings with different WC contents (x = 0, 10, 20, 30 wt%) on its surface using plasma cladding technology. The effects of WC content on the microstructure, mechanical properties, and corrosion resistance of the coatings were systematically investigated. The results indicate that without WC addition, the coating consists of a dual-phase structure comprising BCC and FCC phases. With the incorporation of WC, the FCC phase disappears, and the coating evolves into a composite structure based on the BCC matrix, embedded with multiple carbide phases such as W2C, M7C3, MxCγ, and Co6W6C. These carbides are predominantly distributed along grain boundaries. As the WC content increases, significant grain refinement occurs and the volume fraction of carbides rises. The coating exhibits a mixed microstructure of equiaxed and columnar crystals, with excellent metallurgical bonding to the substrate. The microhardness of the coating increases markedly with higher WC content; however, the rate of enhancement slows when WC exceeds 20 wt%. The hardness of 1066.36 HV is achieved at 30 wt% WC. Wear test results show that both the friction coefficient and wear rate first decrease and then increase with increasing WC content. The optimal wear resistance is observed at 20 wt% WC, with a friction coefficient of 0.549 and a wear mass loss of only 0.25 mg, representing an approximately 40% reduction compared to the WC-free coating. Electrochemical tests demonstrate that the coating with 20 wt% WC facilitates the formation of a dense and stable passive film in NaCl solution, effectively inhibiting Cl−ion penetration. This coating exhibits the best corrosion resistance, characterized by the lowest corrosion current density of 1.349 × 10−6A·cm−2and the highest passive film resistance of 2764 Ω·cm2.
研究领域:
材料科学
·
表面工程
·
金属学
·
腐蚀科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2024
·
IF 4.2
Xiao-Chun Deng,Guo-Hua Zhang
Ultra-high toughness and ultra-high hardness WC-10Co- x Al 2 O 3 cemented carbides were successfully prepared by vacuum liquid phase sintering (VS) and spark plasma sintering (SPS) using ultrafine WC and commercial Co powders as raw materials, respectively. The effects of nano-Al 2 O 3 content and sintering process on the relative density, average grain size, microstructure and mechanical properties of WC-10Co alloys were investigated. The results showed that the densification degree of the samples decreased with the increase of Al 2 O 3 content. In addition, the relative densities of the samples prepared by SPS were lower than those of the samples prepared by VS. For the samples prepared by VS, the average grain size increased first and then decreased as the Al 2 O 3 content increased from 3 wt% to 9 wt%, and the percentage of coarse grain showed the same trend. When the addition of Al 2 O 3 was 6 wt%, the average grain size reached the maximum value of 1.39 ± 1.03 μm. Meanwhile, the sample with 6 wt% Al 2 O 3 had a typical inhomogeneous dual-grain structure, and the percentages of fine grain (< 1 μm) and coarse grain (> 1 μm) were about 50%, which displayed the highest fracture toughness of 18.59 MPa·m 1/2 . The dual-grain structure not only improved the toughness, but also compensated the loss of hardness. However, for the samples prepared by SPS, with the increase of Al 2 O 3 content, the average grain size of WC decreased, while both hardness and toughness were continuously improved. When the Al 2 O 3 content increased to 9 wt%, the grain size reached the minimum value of 0.25 ± 0.08 μm, and meanwhile, the hardness and toughness reached the maximum value of 19.69 GPa and 12.29 MPa·m 1/2 , respectively. Moreover, as the Al 2 O 3 content increased, the transverse rupture strength (TRS) of the samples prepared by VS increased first and then decreased, and the TRS of sample with 3 wt% Al 2 O 3 reached the maximum value of 1410 MPa. However, the TRS of the sample prepared by SPS showed a decreasing trend.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhengchen Qiao,Xinyun Liu,Long Yuan,Hua Lei
In recent years, Lithium-sulfur (Li-S) batteries have great potential to replace lithium batteries as one of the new generations of energy storage devices due to their high energy density, environmental friendliness, abundant natural resources and low cost. However, there is a serious polysulfide "shuttle phenomenon" in Li-S batteries, which greatly leads to the loss of battery capacity and the reduction of coulomb efficiency. Based on the above, a novel tungsten carbide (WC)-modified nitrogen-doped carbon nanotubes/nickel composite (N-CNTs/Ni@WC) was synthesized under argon atmosphere in this paper. The carbon nanotubes functioned as physical barriers to inhibit the shuttling of LiPSs, while the highly polar WC and Ni nanoparticles chemically adsorbed the polar LiPSs and simultaneously exerted a catalytic effect to induce Li 2 S deposition and facilitate the redox reaction. In addition, N-CNTs, Ni and WC have high ionic conductivity, in favor of fast lithium-ion transport. Because of these features, Li-S batteries on the basis of modified N-CNTs/Ni@WC separators show a high initial discharge capacity (1139.56 mAh g −1 at 0.5 C current density), high coulomb efficiency (close to 100 % after 500 cycles at 1 C), and low capacity decay rate (0.08 % for 500 cycles with 1 C). In conclusion, this work offers a method for optimizing the preparation and design of materials for lithium-sulfur separators in a reliable way.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Jingmao Li,Xiaoqiang Li,Jiaming Lai,Hao Qiu,Ting Cao
In this work, a novel way was developed to facilitate the sintering of a binderless cemented carbide with Al 2 O 3 contain while improving its toughness. WC- 1.87 wt % Al 2 O 3 - 4.13 wt %ZrO 2 cemented carbides with 1 wt % B 2 O 3 as additives were consolidated by high energy ball-milling and spark plasma sintering the as-milled composite powders. The effects of 1 wt % B 2 O 3 content on the sintering behaviour, microstructure and mechanical properties of the obtained cemented carbides were investigated. The presence of B 2 O 3 significantly lowers the sintering temperature by forming liquid phase and react with Al 2 O 3 which contributed to obtaining fully dense specimens at 1350 °C and maintains fine grain sizes of WC until the temperature exceeding 1450 °C. The sintering temperature of the specimens with optimum mechanical properties has been also reduced comparing that of the original WC- 1.87 wt % Al 2 O 3 - 4.13 wt %ZrO 2 cemented carbides. Furthermore, the addition of B 2 O 3 triggered the reaction between B 2 O 3 and Al 2 O 3 resulting in forming in-situ elongated aluminium borate grains (A 4 B 2 O 9 and A 18 B 4 O 33 whiskers), which promoted the toughness. The specimens sintered at 1450 °C exhibited optimal mechanical properties: the Vickers hardness and fracture toughness were 19.26 GPa and 11.49 MPa m 1/2 , respectively.
研究领域:
材料科学
·
工程学
✓ 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）