METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
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2024
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IF 2.4
Chen Mao,Chen Buxin,Jiang Yang,Zheng Kui,Hu Meilong,Qiu Shuxing
Ti(C,N) is commonly observed in vanadium titanomagnetite blast furnaces and greatly affects the stable and smooth operation of the smelting processes. To get fundamental insight into Ti(C, N) formation, systematic experiments were conducted to investigate the effects of the composition of slags, temperatures, reaction time and reaction atmosphere on the formation of Ti(C,N) from TiO 2 -containing slags. The results show that TiN and TiC contents increase with TiO 2 content increases. When TiO 2 is larger than 30 wt pct, TiN contents increase dramatically. Control of basicity, MgO and Al 2 O 3 concentrations in the slag could help to reduce Ti(C,N) contents in slags. TiN and Ti(C,N) contents increase dramatically with the extension of time. TiN is more easily formed at high temperatures, and TiN contents increase with the increase of temperature. With the increase of N 2 contents, TiC contents are relatively stable, and TiN and Ti(C,N) contents increase almost linearly. H 2 would greatly promote the formation of TiC. This paper can provide a theoretical basis for minimizing the formation of Ti(C,N) in different blast furnace conditions.
研究领域:
冶金学
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材料科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Zhaorui Zhang,Haiying Du,Huashuai Hu,Dongchen Tan,Jinkui Chu,Minghui Yang
Two-dimensional transition metal carbon nitrides (MXenes) are a prominent class of functional materials with significant potential for sensing applications. However, their conventional charge transfer mechanisms pose limitations for detecting nitrogen dioxide (NO 2 ). In this study, we successfully design-synthesized potassium titanate (KTO) nanoribbons by oxidizing and alkalizing monolayer Ti 3 C 2 T x MXene, targeting room-temperature NO 2 detection. The Ti 3 C 2 T x -derived KTO exhibited exceptional selectivity for NO 2 , achieving a remarkable response of 649.2 % for 50 ppm NO 2 , which is 550 times higher than that of the Ti 3 C 2 T x sensor (1.18 %). Additionally, the sensor demonstrated a detection limit as low as 5 ppb at room temperature, along with rapid response (1 s) and recovery times (2 s), and excellent linearity. Computational analysis showed that the abundant OH groups on the KTO surface contribute to strong selective adsorption (2.79 |eV|) and efficient electron transfer (0.91 |e|) for NO 2 . The unique proton conduction mechanism of KTO further reduced the activation energy for proton transport, enhancing NO 2 sensing performance. This study highlights the potential of Ti 3 C 2 T x -derived KTO nanomaterials for advanced room-temperature NO 2 detection and sensor technology development.
研究领域:
材料科学
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传感器技术
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环境监测
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Mengwen Zhang,Fanyu Meng,Binyang Jiang,Jinsheng Li,Lei Fan,Shoulei Yang
To further enhance the performance of Al 2 O 3 -Ti(C,N) composites, this study employed novel sinter forging and dynamic sinter forging techniques, comparing them with conventional hot pressing and oscillatory pressure sintering. The results revealed that the composites produced by all four processes exhibited high density and no phase transition or formation of new phases. However, the composites prepared by sinter forging and dynamic sinter forging exhibited significantly improved strength and hardness. The hardness of the composites produced by sinter forging increased to 23.39 GPa, while the strength reached 1142 MPa, representing a 61 % improvement compared to those sintered by hot pressing. This improvement can be attributed to the significant plastic deformation induced by the sinter-forging process, which results in a higher dislocation density at the grain boundaries and within certain grains, enhanced coordinated deformation between grains, and stronger grain boundary bonding. Furthermore, the average grain size was smaller. Therefore, sinter forging and dynamic sinter forging offer substantial advantages in the preparation of advanced 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
Metals
·
2020
·Vol. 10
·期 7
·927
·
IF 2.117
Xuelei Wang,Qiufeng Wang,Zhaojun Dong,Xiaoqian Zhou,Xiaoliang Wang,Boyan Zhang,Chao Meng
Ti(C,N)-based cermets with multicomponent ingredients were prepared using vacuum sintering technology. The effect of molding agents, binder phase and sintering temperature on Ti(C,N)-based cermets were studied. The optimum molding performance was obtained by adding 2% polyvinyl alcohol (PVA-1788). The microstructure and mechanical properties of Ti(C,N)-based cermets were investigated. The Ti(C,N)-based cermet with a weight percentage of TiC:TiN:Ni:Co:Mo:WC:Cr3C2:C = 40:10:20:10:7:8:4:1 and sintered at 1450 °C had the optimal mechanical properties. The relative bending strength, Vickers hardness, elastic modulus and wear resistance were 2010 MPa, 15.01 GPa, 483.57 GPa and 27 mg, respectively. Additionally, X-ray diffraction (XRD), backscatter scanning electron microscopy pictures (SEM–BSE), energy dispersive spectrometry (EDS) and optical micrographs of Ti(C,N)-based cermets were characterized.Keywords:Ti(C,N)-based cermet;vacuum sintering;NiCoMo powder;microstructure;mechanical properties
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
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2023
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IF 2.1
Mengwen Zhang,Na Cao,Fanyu Meng,Lutong Yang,Binyang Jiang,Jinsheng Li,Lei Fan,Shoulei Yang
High-toughness Al 2 O 3 –Ti(C,N) composites reinforced by cBN particles were prepared by the new oscillating pressure sintering technique. The density, phase, and microstructure evolution of the Al 2 O 3 –Ti(C,N)-cBN composites sintered at different temperatures were studied, and their effects on the mechanical properties were investigated. The results show that when the sintering temperature increases from 1300 to 1500°C, the heat preservation time shortens, whereas the density and interface bonding strength of the composites increase. In addition, cBN particles can play the role of crack bridging and be pulled out when the composites fracture, improving the toughness of the Al 2 O 3 –Ti(C,N)–cBN composites. However, when the sintering temperature further rises to 1600°C, a new phase of TiB 2 forms, and the solid solubility of C and N in Ti(C,N) increases, leading to a decrease in density and mechanical properties. As a result, when the Al 2 O 3 –Ti(C,N)–cBN composite is sintered at 1500°C, its mechanical properties reach the maximum values of 21.5 GPa, 5.7 MPa m 1/2 , and 731 MPa for hardness, fracture toughness, and flexural strength, respectively.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
Journal of the Australian Ceramic Society
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2023
·Vol. 59
·期 5
·1231-1239
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IF 1.9
Zhang Mengwen,Jiang Binyang,Yang Lutong,Cao Na,Li Zhaosheng,Fan Lei,Yang Shoulei
The emerging oscillatory pressure sintering technology is used to prepare high-performance Al 2 O 3 -Ti(C,N) ceramic tools for high-speed cutting. By recording the displacement during sintering, the sintering shrinkage rate of the Al 2 O 3 -Ti(C,N) composite was calculated, and the stress exponent n and sintering activation energy Q were calculated according to creep theory to determine the densification mechanism. In addition, the evolution of phases, microstructure and hardness of the composite was also observed. Results show that during oscillatory pressure sintering process at 1400 °C and 1300 °C, the stress exponent of Al 2 O 3 -Ti(C,N) composite is around 2.2 and the sintering activation energy is 486 kJ mol −1 , indicating that the densification mechanism is a diffusion-controlled grain boundary sliding of Al 2 O 3 phase. Additionally, as the oscillatory pressure increases, the average grain size of the Al 2 O 3 decreases and the Vickers hardness increases. Hardness achieves the highest 22.7 GPa when the median oscillatory pressure is 70 MPa at 1400 °C, which is 1 GPa higher than that of static pressure of 70 MPa.
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
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2022
·Vol. 20
·期 1
·527-533
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IF 2.328
Mengwen Zhang,Lutong Yang,Zhaosheng Li,Binyang Jiang
Al 2 O 3 –cBN has received considerable attention in the field of ceramic cutting tools due to its high hardness, high wear resistance, and low cost, but poor interfacial bonding affects the performance of the composite. In this study, a novel hot-forging process was used to prepare high-performance Al 2 O 3 –cBN composites using Ti(C,N) as a binder. The evolution of the morphology, phase, and microstructure of the hot-forged Al 2 O 3 –Ti(C,N)–cBN composites was determined, and the mechanical properties were measured. The relative density of the composites increases significantly after hot forging, and the deformation of the composites increases with the hot-forging temperature. The highest performing Al 2 O 3 –Ti(C,N)–cBN composite was prepared by hot forging at 1600°C and has a hardness of 20 GPa, a bending strength of 647 MPa and a fracture toughness of 5.37 MPa m 1/2 , which are superior to those of a directly hot-pressed sintered composite. However, at hot-forging temperatures higher than 1700°C, Al 5 O 6 N and TiB 2 are formed in the composite. In the composite hot forged at 1800°C, serrated grain boundaries promote the strength and toughness of the composite to 877 MPa and 6.76 MPa m 1/2 , respectively. Therefore, the novel hot-forging process is expected to enhance material properties.
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Chen Su,Mingyu Li,Shuai Zhang,Weiqing Liu,Yuanzhang Wang,Peipei Li,Huanran Feng,Ming-Shui Yao,Weiwei Wu,Lu Zhang
The development of multifunctional hydrogels with enhanced mechanical, electrical, and electromagnetic properties has become a key focus in various advanced applications, including wearable electronics, strain sensors, and electromagnetic interference (EMI) shielding. However, challenges remain in achieving a balanced integration of stretchability, conductivity, and broadband microwave absorption within a single material. This study addresses these limitations by introducing a novel dual-crosslinked Ti₃C₂Tx MXene-based hydrogel designed for wearable sensor and EMI shielding applications. The PVA/MXene/PSS hydrogel is synthesized via a freeze-thaw crosslinking method to create a three-dimensional (3D) conductive network. Water retention and conductivity are enhanced through the synergistic effect between sodium chloride (NaCl) and formic acid (HCOOH), addressing key challenges such as water evaporation and MXene dispersion. The resulting hydrogel exhibits impressive mechanical stretchability (369% tensile strain), long-term stability (6000 s under 25% strain), and ultra-high strain sensitivity with a minimum detectable strain of 1%. It demonstrates gauge factors of 0.78 and 0.51 in the transverse and longitudinal directions for strains below 50%, respectively, and 0.28 and 0.37 for strains between 50% and 100%. Moreover, it demonstrates exceptional broadband microwave absorption with a peak reflection loss of −55.5 dB at 10.73 GHz, with an effective absorption bandwidth of 6.34 GHz. The combination of excellent mechanical, electrical, and microwave properties, along with superior stretchability and durability, makes this hydrogel a promising candidate for next-generation wearable sensors, flexible electronics, and electromagnetic interference shielding.
研究领域:
材料科学
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电子工程
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传感器技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2025
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IF 4.6
Xianrui Zhao,Mengxian Zhang,Zhanjiang Li,Yangyang Zhao,Xunbai Du,Yunsong Cui,Qiangyong Zhang,Serhiy Serbin
TiB 2 -reinforced ultrafine Ti(C,N)-based cermets are fabricated via reactive spark plasma sintering. This study investigates the effect of carbon sources on the sintering processes, microstructures, and mechanical properties of cermets derived from a Co-Ni-Y-Ti-BN-WC-VC-Mo 2 C-TaC-C system. Results reveal that the sintering process involves both solid-state reactions and liquid-phase sintering stages. Compared to graphitic graphite and graphene, amorphous carbon black and nanocarbon exhibit higher reactivity and smaller particle sizes. This characteristic inhibits the Co Ti and Ti Ni reactions but promotes the Ti-BN reaction, thereby reducing the shrinkage rate during the solid-state reaction stage. During the liquid-phase sintering stage, carbon dissolves into the molten metal and subsequently diffuses into preformed TiN to create Ti(C,N). The use of carbon black and nanocarbon facilitates greater consumption of carbon. Consequently, there is an increase in shrinkage rate during this stage, a reduction in residual carbon within the final sintered samples, and an enhancement in relative density. Moreover, C atoms present in the liquid phase would promote the diffusion of heavy metals into Ti(C,N). When graphite or graphene is used as a source of carbon, Ti(C,N) with a black core/Gy rim structure is obtained. In contrast, employing carbon black or nanocarbon encourages the diffusion of heavy metals toward the center of Ti(C,N). This behavior contributes to the achievement of weak core/rim-structured Ti(C,N) and coreless solid solution particles with finer particle sizes, respectively. As a result of these processes, the synthesized cermet attains an optimal hardness of 2145 HV and K IC of 7.67 MPa·m -1/2 , along with a minimal wear depth of 8.19 μm.
研究领域:
材料科学
·
力学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Lin He,Yimin Gao,Yefei Li,Zhiwei Liu,Weiyao Zhang,Guangcan Zhou,Hongying He,Siyong Zhao,Honggang Liu,Wentao Yan
Ti(C,N)-304ss cermets with various rare earth yttrium addition were fabricated via powder metallurgy . Fe and Cr atoms dissolved into Ti(C,N) grains and formed a core-rim structure. The first-principle method was employed to calculate the lattice parameters and elastic modulus of the solid solution. The formation of solid solution not only reduced the lattice misfit between the binder phase and hard phase but also improved the hardness of hard phase. The in-situ formed nano-Y 2 O 3 particles existed at the center of Ti(C,N) grains acting as ‘mid effect’ heteromorphic nuclei. The microstructure of cermets was refined with Y addition and the abnormal growth of hard phase was suppressed. The mechanical properties were also improved with Y addition. When the Y content reached 0.3 wt%, the optimal mechanical properties were obtained with a TRS value of 1527 MPa and a hardness value of 91.7 HRA.
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
Journal of Energy Storage
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2025
·
IF 9.8
Xiaomin Hu,Zhe Chen,Jiayou Ji,Liang Li,Huabo Huang,Shidi Wei
Fiber-shaped supercapacitors (FSCs) serve as optimal energy storage components in wearable platforms. However, traditional fiber materials suffer from poor interfacial cross-linking, disordered microstructures, insufficient active sites, and low electrical conductivity. To overcome these challenges, this research develops Zn-MoO₃/Ti₃C₂Tₓ hybrid fibers via wet-spinning technology employing glacial acetic acid as a coagulation bath, with MoO₃ quantum dots intercalated into Ti₃C₂Tₓ interlayers and Ti₃C₂Tₓ nanosheets cross-linked by Zn 2+ . The resulting hybrid fibers feature expanded interlayer spacing, a large ion-accessible surface area, abundant porous channels, exceptional electrical conductivity, and excellent mechanical properties, delivering an exceptional volumetric capacitance of 2078.2 F cm −3 at 2 A cm −3 with 75.0 % capacitance retention at 20 A cm −3 . Furthermore, the constructed FSCs achieve a substantial energy density of 55.6 mWh cm −3 at a power density of 400 mW cm −3 , with 94.7 % capacitance retention after 5000 cycles, and successfully power an electronic timer, demonstrating their potential for wearable applications.
研究领域:
材料科学
·
纳米科技
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能源存储
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柔性电子
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Ruzhen Xie,Yanbin Jiang,Andac Armutlulu,Ziye Shen,Bo Lai,Hui Wang
In this work, cost-effective, magnetic carbon-supported Fe@Ti composite (Fe@Ti/Cs) with abundant active sites was synthesized by one-step carbothermal reduction of ilmenite with the assistance of microwave oven and utilized as a highly efficient persulfate (PS) activator for the wastewater purification. The coexistence of Fe 0/2+/3+ , Ti 3+/4+ and oxygen vacancies on Fe@Ti/Cs was found to favor for the electron transfer to PS, which facilitate the generation of reactive oxygen species (ROS). Catalytic experiment results showed that the Fe@Ti/C-4 produced from ilmenite/carbon with a mass ratio of 4:1 exhibited the best catalytic activation performance towards PS for the degradation of Rhodamine B (RhB). Usage of merely 0.12 g/L Fe@Ti/C-4 enabled the removal of 94.01% RhB (200 mg/L) within 30 min in the PS containing system, significantly outperforming ilmenite + PS (29.29%) and carbon + PS (49.91%) systems tested under the same conditions. The physico-chemical properties of the produced Fe@Ti/Cs before and after the reaction were carefully characterized. Radical scavenging experiments and electron paramagnetic resonance (EPR) analysis were carried out to better understand the underlying mechanism. The results indicate that oxygen vacancies in Fe@Ti/C-4 promoted the electron transfer and participated in the transition metal redox cycle to generate ROS in the PS-containing system, which was highly efficient for degrading RhB into small molecules and finally enabling mineralization. This work offers a new perspective for designing highly efficient and stable PS activators with long life derived from natural ore for environmental remediation.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）