CERAMICS INTERNATIONAL
·
2021
·
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
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2025
·Vol. 68
·期 6
·1-14
·
IF 4.9
Huo Yashan,Qian Yuetong,Zhao Minshan,Zhang Lei,Tan Yujia,He Zhihui,Miao Peng,Zhang Fuchun,Cui Wei,Che Renchao
Efficient, temperature-insensitive electromagnetic attenuation materials are critical for high microwave absorption at high temperatures. This study presents SiC/TiC/SiTiOC hybrid nanofiber mats constructed using an in-situ synthesis method; these mats incorporate SiC/TiC as the microwave loss unit and SiTiOC as the antioxidant unit, offering an innovative approach to high-temperature microwave absorption. The introduction of high-conductivity TiC not only optimizes the dielectric constant and impedance matching of the material but also enhances its thermal cycling stability. This design ensures steady electromagnetic attenuation, enabling the hybrid nanofiber mats to maintain robust absorption performance in the X-band, even at high temperatures. At 873 K, the material demonstrates an effective absorption bandwidth of 3.6 GHz and a minimum reflection loss of −45.55 dB. Compared to single-system absorbers, such as SiC/C nanofiber materials, with a single system, the multi-component SiC/TiC/SiTiOC hybrid nanofiber mats deliver reliable absorption performance in the temperature range of 293–873 K. This study confirms that highly conductive titanium-based ceramic materials used for dielectric property regulation effectively address the challenges of poor temperature stability and limited reusability in high-temperature carbon-ceramic absorbing materials, providing valuable insights and guidance for designing efficient microwave absorbers that can operate across a wide temperature range.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Minghui Zhang,Ming Chang,Weiting Tian,Jingwen Tang,Jiangman Sun,Kai Pan
Titanium Carbide (TiC), characterized by its hardness, conductivity and thermal stability, can serve as a suitable additive phase for SiC nanofibers. TiC phase can improve the flexibility and electromagnetic wave absorption property of SiC nanofibers without sacrificing its high-temperature thermal stability. Herein, flexible SiC/TiC hybrid nanofibers with different Ti contents were fabricated by electrospinning and precursor infiltration pyrolysis. The introduction of Ti can not only generate conductive TiC phase, but also act as a catalyst to regulate the growth of SiC grains, so as to adjust the flexibility and electromagnetic properties of the hybrid nanofibers. At the optimal Ti precursor content of 4 wt%, the SiC/TiC-4 hybrid nanofibers exhibit a broad effective absorption bandwidth of 4.5 GHz with the thickness of 1.6 mm. The flexible SiC/TiC hybrid nanofibers This work can provide a reference for the design of flexible ceramic nanofiber absorbers and is expected to enable practical application in high temperature conditions.
研究领域:
材料科学
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电磁学
·
纳米技术
✓ 已验证
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2022
·Vol. 29
·期 11
·2012-2019
·
IF 3.85
Hu Weiqiang,Gong Fengming,Liu Shaocun,Tan Jing,Chen Songhua,Wang Hui,Ma Zongqing
The oxide dispersion strengthened Mo alloys (ODS-Mo) prepared by traditional ball milling and subsequent sintering technique generally possess comparatively coarse Mo grains and large oxide particles at Mo grain boundaries (GBs), which obviously suppress the corresponding strengthening effect of oxide addition. In this work, the Y 2 O 3 and TiC particles were simultaneously doped into Mo alloys using ball-milling and subsequent low temperature sintering. Accompanied by TiC addition, the Mo−Y 2 O 3 grains are sharply refined from 3.12 to 1.36 µm. In particular, Y 2 O 3 and TiC can form smaller Y−Ti−O−C quaternary phase particles (∼230 nm) at Mo GBs compared to single Y 2 O 3 particles (∼120 nm), so as to these new formed Y−Ti−O−C particles can more effectively pin and hinder GBs movement. In addition to Y−Ti−O−C particles at GBs, Y 2 O 3 , TiO x , and TiC x nanoparticles (<100 nm) also exist within Mo grains, which is significantly different from traditional ODS-Mo. The appearance of TiO x phase indicates that some active Ti within TiC can adsorb oxygen impurities of Mo matrix to form a new strengthening phase, thus strengthening and purifying Mo matrix. Furthermore, the pure Mo, Mo−Y 2 O 3 , and Mo−Y 2 O 3 −TiC alloys have similar relative densities (97.4%–98.0%). More importantly, the Mo−Y 2 O 3 −TiC alloys exhibit higher hardness (HV 0.2 (425 ± 25)) compared to Mo−Y 2 O 3 alloys (HV 0.2 (370 ± 25)). This work could provide a relevant strategy for the preparation of ultrafine Mo alloys by facile ball-milling.
研究领域:
材料科学
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金属合金制备
·
微观结构调控
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 33
·期 1
·458-467
·
IF 2.478
Dong Hua-Dong,Zhao Jian-Ping,Peng Ming-Xing,Zhang Yong-Hui
The Schottky barrier at the interface between the semiconductor phase and the metal phase has excellent rectification effect which can greatly facilitate the formation of the electron accumulation region. The interface electronic modulation can promote the formation of electron depletion layer in the gas sensing process, which is a powerful strategy to improve the sensing performance. In this work, ZnO–TiC composites were successfully prepared. XRD, TEM, BET and XPS characterizations of the ZnO–TiC composites were proformed to investigate the compositions and structures. The as-synthesized samples were applied to fabricate gas sensors to investigate their gas sensing performance. Compared to pure ZnO and TiC, the composites achieved high sensitivity (232 for 100 ppm aniline) and linear detection ( R 2 = 0.986) of aniline. The improvement of sensor performance is mainly attributed to the electronic modulation of Schottky barrier at the interface between ZnO and TiC. Our results indicate that the construction of ZnO-TiC Schottky barrier is a promising strategy for enhancing the performance of gas sensors.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2021
·
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
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
InfoMat
·
2021
·Vol. 3
·期 7
·790-803
·
IF 25.405
Yongshang Zhang,Peng Zhang,Shijie Zhang,Zheng Wang,Neng Li,S. Ravi P. Silva,Guosheng Shao
The realistic application of lithium–sulfur (Li–S) batteries has been severely hindered by the sluggish conversion kinetics of polysulfides (LiPS) and inhomogeneous deposition of Li 2 S at high sulfur loading and low electrolyte/sulfur ratio (E/S). Herein, a flexible Li–S battery architecture based on electrocatalyzed cathodes made of interfacial engineered TiC nanofibers and in situ grown vertical graphene are developed. Integrated 1D/2D heterostructured electrocatalysts are realized to enable highly improved Li + and electron transportation together with significantly enhanced affinity to LiPS, which effectively accelerate the conversion kinetics between sulfur species, and thus induce homogeneous deposition of Li 2 S in the catalyzed cathodes. Consequently, highly active electro-electrocatalysts-based cells exhibit remarkable rate capability at 2C with a high specific capacity of 971 mAh g −1 . Even at ultra-high sulfur loading and low E/S ratio, the battery still delivers a high areal capacity of 9.1 mAh cm −2 , with a flexible pouch cell being demonstrated to power a LED array at different bending angles with a high capacity over 100 cycles. This work puts forward a novel pathway for the rational design of effective nanofiber electrocatalysts for cathodes of high-performance Li–S batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Tingting Lv,Tu Hu,Fang Tian
The conventional carbothermal reduction method for preparing titanium carbide (TiC) from titanium dioxide (TiO 2 ) suffers from high reaction temperature and long processing time, necessitating development of novel reduction processes to reduce energy consumption and improve efficiency. This study utilizing a composite reducing agent of C+H 2 for reducing TiO 2 enables the efficient synthesis of titanium carbide, combining the advantages of both carbon and hydrogen. Herein, we systematically compare titanium carbide synthesis in TiO 2 -C and TiO 2 -C-H₂ systems to elucidate the mechanism of hydrogen enhancement. Thermodynamic calculations compare the preparation processes of titanium carbide in two different systems and reveal the dual role of hydrogen: participation in the reduction reaction and lowering of the oxygen potential. Experimental results demonstrate that the introduction of hydrogen not only significantly increases the carburizing rate from 36.09% to 92.46%, promoting the formation of TiC x O 1-x as the dominant phase, but also doubles the CO content in the exhaust gas compared to the hydrogen-free system. Integrated theoretical-experimental analysis reveals the triple role of hydrogen in accelerating the TiO 2 →TiC x O 1-x transformation through: (1) synergistic reduction with both C and CO, (2) effective lowering oxygen potential of the system, which enhances the thermodynamic driving force to accelerate both the TiO 2 →Ti 2 O 3 reduction and subsequent carbide formation, and (3) increased pore volume generation within the titanium oxide matrix due to the superior diffusivity and reducing capability of hydrogen, thereby facilitating enhanced gas diffusion pathways. This study provides fundamental mechanistic insights into the hydrogen-enhanced carbothermal reduction process for efficient TiC synthesis from TiO₂.
研究领域:
材料科学
·
化学工程
·
无机化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Zhaohuan Wei,Yaqi Ren,Hong Zhao,Minkang Wang,Hui Tang
Alkaline fuel cells are considered as promising energy conversion devices for future application, and oxygen reduction reaction (ORR) catalyst is one of the critical factors in determining fuel cells' performance. However, the application of conventional Pt-based catalysts is limited by its high cost and insufficient reserve. Here we synthesized TiC/C nanofibers as ORR catalyst through electrospinning. The morphology, TiC content, and interface between TiC and carbon in TiC/C nanofibers could be adjusted by changing preparation conditions. The changes in material properties affect the catalytic performance due to the synergistic enhanced effect between TiC and carbon. The best TiC/C sample (TCNFs/C) exhibited the ORR performance with the onset potential, peak potential, peak current density, and charge transfer number of 0.941 V vs. RHE, 0.812 V vs. RHE, 0.742 mA cm −2 , and 3.29, respectively, as well as good catalytic durability and excellent methanol tolerance. The results demonstrate the great research value and application potential of TiC/C nanofibers as ORR catalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Zihan Wang,Qianglong He,Shifeng Ren,Aiyang Wang,Weimin Wang
B 4 C–TiB 2 –graphite ceramic composites were fabricated via reactive hot pressing using B 4 C and TiC as the raw materials. With an increase in the TiC content, the grain size of B 4 C decreased continuously because B 4 C grain growth was inhibited by the TiB 2 and C reaction products. However, excessive TiC content caused an increase in TiB 2 and graphite grain size and the formation of TiB 2 –graphite agglomerates. When the composition of the ceramic composite was 95.1 wt%B 4 C–3.9 wt%TiB 2 –1.0 wt%graphite, the Vickers hardness and bending strength was optimized at 34.9 GPa and 688 MPa, respectively. The results showed that crack deflection is the main toughening mechanism of B 4 C–TiB 2 –graphite ceramic composites, and the effect of TiB 2 –graphite on crack propagation is particularly significant. When the composition of the ceramic composite was 75.6 wt%B 4 C–19.4 wt%TiB 2 –5.0 wt%graphite, the fracture toughness was optimized at 6.77 MPa·m 1/2 . These results provide guidelines on how to effectively control the combined properties of B 4 C–TiB 2 –graphite ceramic composites in future investigations.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qingyuan Cao,Wenhong Jiang,Hanqi Qian,Yudong Huang,Bo Jiang
Materials capable of thermal stability electromagnetic interference (EMI) shielding have practical significance in the fields of aerospace. In this paper, a brand-new polymer-derived SiTiOC ceramic nanocomposites with tubular carbon was designed. The titanium atoms were uniformly introduced into the polysiloxane backbone by the transesterification between tetrabutyl titanate and silanol prepolymer , leading to excellent thermal stability properties. By controlling the pyrolysis temperature, a distinct structure of TiC was formed between the amorphous SiTiOC matrix and free carbon phase for enhanced electromagnetic interference shielding performance. More conductive paths were established, and the TiC structure initiated interfacial polarization and space charge polarization, contributing to the improvement of the dielectric loss and relaxation phenomena. Simultaneously, a total electromagnetic interference shielding efficiency of 27.85 dB at the entire X-band was reported for SiTiOC ceramic nanocomposites. A maximum SE T of 38.59 dB was examined at around 12 GHz, suggesting that over 99.99% of the electromagnetic waves were shielded. The SiTiOC ceramic nanocomposites exhibited outstanding prospects in thermal stability electromagnetic interference shielding application in a severe environment.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2022
·Vol. 34
·期 1
·373-383
·
IF 3.447
Zhang Yaping,Yang Hua,Cao Peiyu,He Yufeng,Zhao Yuxuan,Song Pengfei,Wang Rongmin
The hydrophilic Ti 3 C 2 , typical MXenes containing surface functional groups, possess excellent conductivity, was mainly applied in supercapacitors. However, it had not obvious photocatalytic and antibacterial activity because of high electron hole-pair recombination rate and concentration dependence. In this work, a novel MXenes-based Schottky junction (UiO-NH 2 @TiC) was fabricated by a simple solvothermal method using Ti 3 C 2 as the conductive carrier and UiO66-NH 2 as positively charged nano-MOFs (metal organic frameworks). After verifying the synthesis of UiO-NH 2 @TiC by SEM (scanning electron microscopy), EDS (energy dispersive spectrometer), XRD (powder X-ray diffraction), and FT-IR (Fourier transform infrared spectroscopy), its photochemical properties were also measured. Then, the photocatalytic antibacterial activity and the photodegradation behavior were investigated. The results indicated that UiO-NH 2 @TiC Schottky junction could not only remove the remaining antibiotics in wastewater (91%), but also effectively inhibited the growth of bacteria, and the inhibition rate of E. coli ( Escherichia coli ) and S. aureus ( Staphylococcus aureus ) more than 95% under visible light irradiation. In summary, it is an effective strategy for constructing functional Schottky junction. What’s more, the obtained Schottky junction has great potential in practical application.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）