JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2022
·Vol. 26
·期 3
·791-798
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IF 2.747
Zhao Meiyu,Du Pin,Liu Wei,Du Kaifa,Ma Yongsong,Yin Huayi,Wang Dihua
Making a tantalum carbide (TaC) coating on Ta substrates is an effective way to improve the mechanical and anti-corrosion properties of Ta. However, conventional methods for making a TaC coating require high-temperature conditions of over 1600 °C to get a TaC thickness of > 20 μm. Herein, a TaC coating of > 20 μm thickness was prepared on a Ta substrate in molten CaCl 2 -CaC 2 at 850 °C for 4 h. In the molten salt electrolyzer, the Ta plate served as the anode where C 2 2− was oxidized and simultaneously reacted with Ta to form a TaC layer, and Ca 2+ was reduced and alloyed with C to form CaC 2 that can replenish the C 2 2− . The electrolytic TaC exhibited an average hardness of 962 HV that was 6 times of the bare Ta substrate. In the 3.5 wt% NaCl solution, the TaC coating displayed a higher corrosion potential and lower corrosion current density (0.48 V, 1.59 μA cm −2 ) than Ta substrate (0.35 V, 1.85 μA cm −2 ) and the mixtures of TaC and Ta 2 C (0.35 V, 1.78 μA cm −2 ), indicating its better corrosion resistance. The molten salt anodic carbidation may lead to a general way to prepare transition metal carbide coatings with enhanced carburizing kinetics at < 1000 °C. Graphical abstract
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Mengen Hu,Xincan Gao,Zhen Wang,Xian Dang,Chengwan Yang,Xinyang Li,Ming Li,Yue Li,Xiaoye Hu,Zhulin Huang
Tungsten carbide (WC) cemented carbide plays a crucial role in cutting and mechanical processing. However, the grain coarsening that inevitably occurs during the high temperature sintering process of WC leads to a reduction in mechanical properties. This study presents a strategy for the one-step synthesis of tantalum carbide (TaC) grain inhibitors to enhance ultrafine grain WC ceramics. Specifically, WC-xTaC (where x = 0 wt%, 1 wt%, 2 wt%, 3 wt%, and 4 wt%) powders were synthesized directly in one step using a liquid phase method, thereby eliminating the effects of the ball milling process on the defect density and surface energy of the powders. The mechanical properties of the sintered blocks were evaluated after the synthesized WC-xTaC powders underwent hot press sintering. The results demonstrate a reduction in the grain size of WC from 1.96 μm to 850 nm after sintering compared to WC ceramics without TaC doping. The density of the material improved from 91.4 % to 97.8 %, while the hardness increased from 16.3 GPa to 24 GPa, reflecting an overall enhancement of 47.2 %. This research provides an optimized approach for the fabrication of ultrafine grained WC ceramics.
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
ADVANCED FUNCTIONAL MATERIALS
·
2018
·
IF 13.325
Lu Zhuang,Liu Limeng
TaC ceramics were prepared by hot pressing at 1900 °C for 30 min under 30 MPa mechanical pressure. The effect of adding 1–10 mol% LaB 6 as a sintering aid on densification, the phase composition, microstructure and mechanical properties of the consolidated materials were investigated. TaC and LaB 6 reacted to form the solid solution. The grain average size decreased from 10 μm at 1 mol% LaB 6 addition to 4 μm at 10 mol% LaB 6 addition. The 5 mol% LaB 6 composition had good flexural strength of 312 MPa. Keywords Ultra high-temperature ceramic Tantalum carbide Hot pressing
研究领域:
材料科学
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高温陶瓷研究
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Jie Yin,Xuejian Liu,Jian Chen,Sea-Hoon Lee,Zhengren Huang
Polyacrylic acid (PAA) with three different molecular weights (PAA-3000, PAA-15000, PAA-100000) was used as a dispersant to investigate the aqueous dispersion behavior of commercially available TaC powder. TaC stabilized with PAA-3000 polymer showed the best dispersion behavior according to zeta potential and rheological measurements. In addition, the TaC slurry in the presence of PAA-3000 had a minimized average particle size of merely 1.08 µm when dispersed in alkaline aqueous solutions. This was effective to break down any original agglomerates. A characteristic carboxylic peak was detected after adding PAA-3000 to the aqueous TaC system, using XPS analysis. Our TEM results confirmed that the surface properties of TaC were modified by the PAA-3000 dispersant. The slip-cast green body exhibits enhanced homogeneity compared to its dry-pressed counterpart. A dense TaC monolithic ceramic (>99%) was obtained after sintering. This study contributes to the understanding of advanced wet-forming techniques for TaC ceramics.
研究领域:
材料科学
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陶瓷加工
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2019
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IF 2.781
Faqiang Shi,Limeng Liu,Zhaoping Hou,Guihong Geng,Yujin Wang
Tantalum carbide ceramics with an overall composition of TaC 0.6 were prepared by hot pressing at 1700 °C for 1 h under 30 MPa pressure with fcc TaC and bcc Ta powder as starting materials. Effects of adding 0–30 mol% Cu on densification, phase formation, microstructural evolution , mechanical properties and electrical conductivity of the obtained composite ceramics were investigated. Full density could be reached at 20 mol% Cu addition and above. Reactions between TaC and Ta resulted in the final phases of hexagonal Ta 2 C and rhombohedral ζ-Ta 4 C 3-x . Plate-shaped ζ laminate grew in both TaC and Ta 2 C and consequently had their sizes confined by the parental grains. Addition of 20–30 mol% Cu could significantly grow the intermediate Ta 2 C grains, hence controlling length of the ζ laminates precipitated in them to form bimodal microstructures consisting of large grains. The 20 mol% Cu composition had a better flexural strength (706 ± 46 MPa) and fracture toughness (9.2 ± 1.7 MPa m 1/2 ). Electrical resistivity at room temperature of the composites decreased with Cu content from 1.03 μΩ m at 0 mol% addition to 0.12 μΩ m at 30 mol% Cu.
研究领域:
材料科学
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陶瓷学
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复合材料
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粉末冶金
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结构陶瓷
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物理化学
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固态化学
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DOI
高影响因子
Journal of Nanomaterials
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2018
·Vol. 2018
·期 1
·1634814
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IF 2.207
Lianbing Zhong,Guihong Geng,Yujin Wang,Feng Ye,Limeng Liu
A fully dense TaC ceramic was prepared by hot pressing using 10 mol% ZrC plus 5 mol% Cu as a sintering aid. Formation of (Ta, Zr)C solid solution (ss) by reaction between TaC and ZrC facilitated densification. Addition of Cu refined the microstructure and consequently improved flexural strength of the TaC ceramics. TEM investigation found ubiquitous precipitation of nanocrystallites at multigrain conjunctions. The nanocrystallites were (Ta, Zr)C solid solution with uniform dispersion in an oxygen-rich glassy matrix. Although formation of nanoprecipitates may not much affect the mechanical properties of the TaC ceramic, the structure suggested a new type of nanoceramic worth further research.
研究领域:
材料科学
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陶瓷学
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固态化学
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显微结构分析
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复合材料
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2019
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IF 4.784
Xinyu Hu,Yongmei Wang,Man Xu
Salecan is a linear microbial polysaccharide obtained from the fermentation of Agrobacterium sp. ZX09. Salecan is suitable for the preparation of hydrogels for biomedical applications, given its prominent physicochemical and biological properties. Herein, we described a novel microwave-assisted polymerized composite hydrogel that was comprised of salecan/poly(diacetone acrylamide) (PDAAm) network and tantalum carbide (TaC) nanoparticles. The incorporation of TaC nanoparticles into the composite hydrogels was confirmed by XRD and EDX analysis, and can be engineered as means for structural reinforcement, thus leading to a remarkable improvement in their thermal stability and mechanical properties. Compared to bare salecan/PDAAm hydrogel, >9.3-fold increase in compressive modulus and 7-fold increase in storage modulus were achieved with the addition of 3 mL of TaC nanoparticles dispersion (5%, w/v). More importantly, cytotoxicity results revealed that the composite hydrogels were non-toxic to L929 and 3T3-L1 cells. Cell proliferation and Live/Dead staining demonstrated that salecan/PDAAm/TaC composite hydrogels provided a desired environment for cell adhesion, and allowed proliferation at the normal rate. All the results highlight the value of this system for potential application as cell adhesion material.
研究领域:
材料科学
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生物医学工程
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纳米技术
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生物材料
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
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2024
·
IF 6.2
Ruxia Liu,Wei Zhao,Ye Tian,Jian Zhang,Guoqiang Luo,Qiang Shen
TaC enhancement particles and Re alloy were used to improve the strength and ductility of the tungsten alloy. The synergetic effect of TaC addition and Re alloying on relative density, microstructure, and mechanical properties of tungsten alloy were investigated. The results indicated that a W-based composite with 2.5 wt% TaC addition and 25 wt% Re alloying exhibited yield stress of 1.23 GPa, the ultimate compressive stress of 2.86 GPa, bending strength of 1.30 GPa and strain capacity of 42 %, which was increased by 114 %, 140 %, 226 %, and 133 % than those of pure W. Further analysis revealed that the grain boundary purification, grain refinement, and kinematic strain gradient contribution because of the addition of TaC, lattice distortion, and the generation of dislocations because of the addition of Re alloying are the main strengthening mechanisms in W–TaC-Re composite.
研究领域:
材料科学
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力学
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DOI
高影响因子
METALS AND MATERIALS INTERNATIONAL
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2024
·
IF 3.3
Liang Jing,Jin Shipeng,Lv Nanying,Wang Cong,Yin Xiuyuan,Chen Suiyuan,Liu Changsheng
Ti 2 AlNb-based coatings with different TaC additions (0, 1.25, 2.5 and 5 at%) were prepared on Ti-6Al-4 V alloy to improve its surface properties by laser cladding. The effects of TaC addition on the morphology, microstructure transformation and mechanical properties of the laser cladding TiC/Ti 2 AlNb coatings were studied. The results showed that the TiC/Ti 2 AlNb coatings mainly composed of matrix B2 phase, layered O phase and a small amount of TiC. In situ formed TiC effectively refined the microstructure of the coatings. When the TaC addition increased from 0 to 5 at%, with the amount of in situ formed TiC increased from 0 to 20%, the grain size of B2 decreased from ~ 400 μm to ~ 50 μm, and the grain size of O phase decreased from ~ 3 μm to ~ 1 μm. The microhardness and wear resistance of TiC/Ti 2 AlNb based coatings improved when the TaC addition increased from 0 to 2.5 at%. The average microhardness for the sample with 2.5 at% TaC addition (602.18 HV 0.5 ) was 1.06 times that of the sample without TaC (568.36 HV 0.5 ), while the wear mass loss (16.28 mg) at 25 ℃ was only 43.4% that of the sample without TaC (37.50 mg). When the samples worn at 400 ℃ and 800 ℃ for 45 min, the wear mass losses of the sample with 2.5 at% TaC addition were only 15.13 mg and 13.50 mg, which were 50.9% and 51.5% these of the sample without TaC addition, respectively. The wear mass loss of sample with 5 at%TaC addition increased up to 16.04 mg and 16.4 mg, which means the large amount coarse TiC (dendrites) and the decrease of O phase fraction lowed the wear resistance of the TiC/Ti 2 AlNb coatings, though it still less than that of the Ti 2 AlNb coating (29.68 mg and 26.2 mg). Graphical Abstract
研究领域:
材料科学
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表面工程
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产品关联
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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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Yumeng Zhang,Wei Sun,Yulin Zeng,Tianxia Dong,Nanjun Deng,Yehua Sun,Xiang Xiong
EtOH/BA composition regulated PVP retention and suspension behavior. • Apparent retention and near-surface PVP signal followed different trends. • 80 wt% EtOH gave the lowest viscosity and slowest 48 h clarification. • Maximum apparent PVP retention did not give the best suspension performance. Solvent composition can alter polymer adsorption and polymer–solvent interactions, but how these coupled effects govern highly loaded non-aqueous suspensions remains unclear. Here, 75 wt% tantalum carbide (TaC) suspensions containing 4–10 mg g −1 poly(vinyl pyrrolidone) (PVP) were prepared in ethanol/benzyl alcohol (EtOH/BA) mixed solvents. Rheology, sedimentation, particle-size analysis, thermogravimetry (TG), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and solvent-quality calculations were combined to relate suspension behavior to apparent PVP retention, the relative near-surface PVP signal, and PVP–solvent compatibility. The suspension containing 80 wt% EtOH and 8 mg g −1 PVP exhibited the lowest viscosity, the smallest 48 h sedimentation ratio (33.3%, compared with 45.2% and 49.0% at 70 and 90 wt% EtOH, respectively), and the most uniform particle-size distribution. The TG-derived apparent PVP retention indicator followed the order 70 wt% EtOH > 80 wt% EtOH > 90 wt% EtOH, whereas the XPS-derived N 1 s/Ta 4p 3/2 fitted peak-area ratio, R N / T a , followed 80 wt% EtOH > 70 wt% EtOH > 90 wt% EtOH. FTIR showed a shift of the PVP carbonyl band after contact with TaC, while solvent-quality calculations indicated increasingly favorable PVP–solvent compatibility with increasing EtOH content. These results show that the TG-derived apparent retention indicator did not directly correspond to the relative near-surface PVP signal or suspension behavior. The optimum performance at 80 wt% EtOH was therefore consistent with a favorable balance among apparent PVP retention, the relative near-surface PVP signal, and PVP–solvent compatibility. Download: Download high-res image (199KB) Download: Download full-size image
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高影响因子
International Journal of Metalcasting
·
2025
·
IF 2.5
Du Danfeng,Nie Xinfeng,Sun Chaowei,Liu Zexin,Guo Xiurong
Aluminum foam often collapses during the foaming process, adversely affecting its pore structure and resulting in suboptimal compression and energy absorption performance. To address this issue and enhance the mechanical properties of aluminum foam for broader applications in the automotive industry and other fields, this study developed an Al/TaC foam composite (AT-FC) using powder metallurgy. The composite incorporates tantalum carbide (TaC) as reinforcement particles, titanium powder as a combustion aid, titanium hydride as a foaming agent, and wood fiber as a space-holder material. The effects of varying TaC content on the pore structure and distribution of the aluminum foam composite were systematically investigated, alongside axial quasi-static compression tests. The results reveal that TaC content significantly influences the porosity and pore distribution of aluminum foam, while the inclusion of wood fiber as a spatial support material effectively prevents collapse. Compression tests showed that the mechanical properties were optimized with 10% TaC content, achieving a compressive strength of 10.223 MPa and an energy absorption capacity of 3.977 MJ/m 3 before reaching the densification strain. Graphical
研究领域:
材料科学
·
机械工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）