Materials Today Communications
·
2023
·
IF 3.8
Hui Wang,Dongdong He,Weidong Huang,Xinxi Chen,Yu Wang,Lihong Huang
In this study, LaB 6 -reinforced Ti6Al4V was successfully fabricated by the selective laser melting (SLM) process. TiB and La 2 O 3 with particle-like shapes formed uniformly after the in-situ reaction of LaB 6 and Ti6Al4V. The sizes of the TiB and La 2 O 3 particles were around 1 µm and 200 nm, respectively. Due to a combined strengthening effect of the micrometer-scale and nanoscale reinforcements, the mechanical properties of the LaB 6 /Ti6Al4V samples were enhanced significantly. However, the effect was highly related to the SLM parameters. As the laser power increased, the TiB changed from particle to needle-like shape and La 2 O 3 tended to aggregate and grow into a larger size. Besides, the martensite α-Ti also became coarser, which was disadvantageous to the mechanical performance. The desired inner structure can be obtained by adjusting the processing parameters of the SLM. The best mechanical performance of the SLM LaB 6 /Ti6Al4V samples was achieved at the laser power of 260 W and the scanning speed of 500 mm/s. The maximum tensile strength and Vickers hardness were 1337.1 MPa and 477.62 HV, respectively, which outperformed the other counterparts significantly. Thus, the results suggest that the in-situ reaction of LaB 6 and Ti6Al4V can improve the mechanical properties of the Ti6Al4V alloys effectively.
研究领域:
材料科学
·
增材制造
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 20
·6032
·
IF 3.623
Bo Yang,Yang Liu,Wenjie Ye,Qiyang Wang,Xiao Yang,Dongmei Yang
The encapsulation and heat conduction of molten salt are very important for its application in heat storage systems. The general practice is to solidify molten salt with ceramic substrate and enhance heat conduction with carbon materials, but the cycle stability is not ideal. For this reason, it is of practical significance to study heat storage materials with a carbon-free thermal conductive adsorption framework. In this paper, the in-situ reaction method was employed to synthetize the constant solid-state composites for high-temperature thermal energy storage. AlN is hydrolyzed and calcined to form h-Al2O3with a mesoporous structure to prevent the leakage of molten eutectic salt at high temperature. Its excellent thermal conductivity simultaneously improves the thermal conductivity of the composites. It is found that 15CPCMs prepared with 15% water addition have the best thermal conductivity (4.928 W/m·K) and mechanical strength (30.2 MPa). The enthalpy and the thermal storage density of 15CPCMs are 201.4 J/g and 1113.6 J/g, respectively. Due to the excellent leak-proof ability and lack of carbon materials, the 15CPCMs can maintain almost no mass loss after 50 cycles. These results indicate that 15CPCMs have promising prospects in thermal storage applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
VACUUM
·
2022
·
IF 4.11
Xinjiang Zhang,Ziqing Chen,Zhaohui Liu,Meng He,Zirun Yang,Jiahui Wang
The in-situ hybrid particle-reinforcements are a novel strengthening mode for the advanced metal matrix composites . In this study, Zr matrix composites incorporating the fixed amount of ZrC particles with the different amounts of Y 2 O 3 particles were prepared by the in-situ reaction among Zr, graphite, Y, and ZrO 2 during the arc-melting. Results revealed that the graphite/Zr reaction produced the uniform in-situ ZrC particles in the Zr matrix, and the Y/ZrO 2 reaction formed the Y 2 O 3 particles. In-situ Y 2 O 3 addition refined the Zr matrix and led to the polygonal morphology of the ZrC particle. The coarser Y 2 O 3 grew in bulk, and some fine Y 2 O 3 dendrites were formed along Zr boundaries. The influence of different contents of Y 2 O 3 reinforcements on the hardness and compressive properties were analyzed. Compared with the single ZrC reinforcements, the hybrid Y 2 O 3 introduction resulted in a higher hardness and enhanced compressive strength . This hybrid structures were believed to be favorable to mechanical responses in the composites, and the relevant mechanisms for the hardening and strengthening effect of such hybrid forms were discussed.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Huan Guo,Bingzhu Wang,Ruifeng Li,Xiaohu Li,Jixiang Dai,Yongzhong Zhao,Jianjun Sha
Aiming at the high sintering temperature and densification difficulty in ultrahigh-temperature ceramics, the low-temperature facial and fast preparation of ultrahigh-temperature multi-phases (Hf, Ta)B 2 -(Hf, Ta)C-SiC solid solution ceramics was realized using in-situ reaction combined with hot pressing, where the HfSi 2 , TaSi 2 , B 4 C and C were used as raw materials. The effect of Hf/Ta molar ratio on the microstructural evolution and mechanical properties of ultrahigh-temperature multi-phases ceramics was investigated. The results found that the in-situ reaction and the formation of solid solution phase could promote the densification process. On the other hand, the addition of Ta element induced the formation of high aspect ratio grains with an interlock structure within the ceramic matrix and significantly improved the mechanical properties. When the Hf/Ta molar ratio was 7/3, the multi-phases ceramics exhibited the best mechanical properties, with a hardness of 25.59 GPa, a flexural strength of 556.61 MPa, and a fracture toughness of 5.13 MPa·m 1/2 . The enhanced mechanical properties were attributed to the synergistic effect of multiple strengthening and toughening mechanism, including grain bridging, crack bifurcation and grain pullout induced by high aspect ratio (Hf, Ta)B 2 grains.
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
WASTE MANAGEMENT
·
2019
·
IF 5.431
Ruixue Wang,Yiqing Hou,Zhenming Xu
In the past, the pretreatment and indium extracting were conducted in independent disposal system to recycle indium from waste liquid crystal display (LCD), which make the recycling process inefficient and costly. In this study, an efficient and environmental friendly indium recycling process was proposed by an in-situ reaction process. The carbon residue generated in the pretreatment stage (organic removing stage) was used as the reductant to extract indium in the same reaction system. Comparison results indicated that the reaction effects of pyrolytic carbon were much better than coke since the structure of pyrolytic carbon is porous which would make the reactants contact better, and promote the reaction efficiency. Futhermore, results showed that the pyrolytic carbon was sufficient for the indium reduction without adding extra reductant, and indium conversion rate can reach 99.08% under the condition of 935 °C, 5 Pa, 2.5 wt%, 30 min, <0.3 mm. In this study, the organic pollutants were removed, while the indium also could be recycled in a closed-loop system. To sum up, this study could simplify the process route of waste LCD recycling, and provide fundamental basis as well as practical experience for recycling waste LCD environmentally and efficiently.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2019
·
IF 10.159
Zhiwei Zhou,Junyou Yang,Qinghui Jiang,Jiwu Xin,Sihui Li,Xiaochun Wang,Xuesong Lin,Ruisi Chen,Abudl Basit,Qi Chen
In this work, a composite product of Mn-substituted SnTe, SnO2 nanoparticles, and MnTe-supersaturated precipitates has been fabricated by a simple in situ reaction between SnTe and MnO2 for the first time. Benefiting from the synergistic effect induced by the product of in situ reaction, a remarkable improvement in the thermoelectric performance has been achieved. On the one hand, Mn substitution in SnTe can effectively modify the band structure and enhance the electrical properties of SnTe; on the other hand, the thermal transport can also be dramatically suppressed by in situ reaction-derived multiscale phonon scattering by point defects, SnO2 nanoparticles, and supersaturated MnTe precipitates. Ultimately, a maximum ZT of ∼1.5 at 873 K has been achieved in the SnTe + 10 mol % MnO2 sample, which increases by 224% in comparison with the pristine SnTe, representing one of the best results ever reported for SnTe-based thermoelectric materials.
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2017
·
IF 2.324
Yangyang Hong,Lijie Chen,Guolin Song,David Bassir,Simin Cheng,Xinghong Shi,Haifeng Liu,Guoyi Tang
The biodegradable composites with low cost and excellent mechanical property, namely PLA/talc blends, have been successfully prepared by using epoxidized soybean oil (ESO) as a reactive compatibilizer with the presence of peroxides to accelerate the in situ grafting between talc and other components. The surface treatment of talc powder was performed through the in situ reactions of its rich hydroxyl groups with the epoxide ring of ESO and scission radical of PLA during the blending process. Both FTIR and the extracting experiment results verified that surface modification mechanisms. Such a facile and efficient one-step process can bring a dramatic improvement on both miscibility and mechanical properties of the PLA/talc composites. POLYM. COMPOS., 39:E1618–E1625, 2018. © 2017 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Mengxia Wang,Bing Han,Dongye Zhao,Sen Hou,Weizhao Yin,Yanyan Gong
Faced with worldwide mercury (Hg) contamination in groundwater, efficient in situ remediation technologies are urgently needed. Carboxymethyl cellulose (CMC) stabilized iron sulfide (CMC-FeS) nanoparticles have been found effective for immobilizing mercury in water and soil. Yet, the potential use of the nanoparticles for creating an in situ reactive zone ( ISRZ ) in porous geo-media has not been explored. This study assessed the transport and deliverability of CMC-FeS in sand media towards creating an ISRZ . The nanoparticles were deliverable through the saturated sand bed and the particle breakthrough/deposition profiles depended on the injection pore velocity, initial CMC-FeS concentration, and ionic strength. The transport data were well interpreted using an advection-dispersion transport model combined with the classical filtration theory. The resulting ISRZ effectively removed mercury from contaminated groundwater under typical subsurface conditions. While the operating conditions are yet to be optimized, the Hg breakthrough time can be affected by groundwater velocity, influent mercury concentration, dissolved organic matter, and co-existing metals/metalloids. The one-dimensional advection-dispersion equation well simulated the Hg breakthrough data. CMC-FeS-laden ISRZ effectively converted the more easily available Hg species to stable species. These findings reveal the potential of creating an ISRZ using CMC-FeS for in situ remediation of Hg contaminated soil and groundwater.
研究领域:
环境科学
·
土壤修复
·
水文学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 101
·期 8
·3617-3626
·
IF 2.956
Deng Pan,Shufeng Li,Xin Zhang,Bo Pan,Shengyin Zhou,Yabo Fu,Katsuyoshi Kondoh
Strip-shaped W 2 B 5 reinforced B 4 C ceramic composites were prepared via in situ reaction of boron(B)-graphite(Gr)-WC system by powder metallurgy (P/M). In order to study the effect of the graphite content on the properties of the as-fabricated ceramic composites, the powder mixture of B-Gr-WC with various amounts of Gr powder were blended and consolidated by spark plasma sintering (SPS). The sintering parameters were shown as following: sintering pressure was set as 30 MPa; The three-step sintering temperature was 1100-1550-1700°C and the duration time was set as 5-5-6 minutes, respectively. In situ formed strip-shaped W 2 B 5 particles were dispersed homogeneously in B 4 C matrix, which resulted in a remarkable improvement on the fracture toughness and mechanical properties. Appropriate 5vol% residual Gr in the composite shows positive effect on the mechanical properties which achieved an optimal counter-balance of fracture toughness and hardness, the relative density was 99.8%, the Vickers hardness can reach 30.2 GPa, and the fracture toughness was 11.9 MPa·m 1/2 when the sintering temperature was set at 1700°C.
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
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Lijun Meng,Lihan Liu,Senjian Han,Xuan Zhou,Jiayi Luan,Lina Xu,Shiqiang Wang,Tianlong Deng
Immobilization of metal ferrocyanides (MFCs) on the surface of substrate is supposed to be an efficient method for selectively removing cesium ions. In this study, the high adsorption performance of modified polyacrylonitrile membrane for Cs removal was fabricated by incorporating copper ferrocyanide (CuFC) nanoparticle via in situ acid-base reaction of carboxylated polyacrylonitrile (CPAN) and Cu(OH) 2 during the phase inversion process. Simultaneously, the induced coprecipitation reaction caused the uniformly embedded CuFC throughout the substrate of CPAN. The obtained CuFC-CPAN showed a preferred adsorption capacity of 331.65 mg g −1 and favorable selectivity in the presence of numerous coexisting ions. The experimental validation and characterizations suggested the adsorption mechanism was mainly ion exchange with a fraction of electrostatic attraction. The high pH stability and reusability make the CuFC-CPAN membrane a reliable choice for efficient Cs removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Chongkai Zhao,Xueyu Lin,Xiaosi Su,Shengyu Zhang
Dichloroethane (1,2-DCE), a common groundwater contaminant in petroleum extraction and refining areas, poses a threat to both the environment and nearby populations. To address this issue, a cost-effective and straightforward engineering approach is suitable for treating contaminated areas. In this study, nitrogen-doped biochar was prepared through an anoxic roasting modification method using sesame meal. At optimal dosage: 4.5 mM persulfate with 1.2 g/L N-SDB. The system achieved complete removal of 0.1 mM of 1,2-DCE within 90 min, with a total organic carbon (TOC) removal rate of 87.03 %. The biochar exhibited excellent stability, achieving 99.88 % removal of 0.1 mM 1,2-DCE and 76.13 % removal of TOC after six degradation cycles. The results indicated three main pathways for 1,2-DCE degradation, with hydroxyl radicals (·OH) and single-linear oxygen ( 1 O 2 ) as the main reactive species in the reaction system. Moreover, we developed a biochar in-situ reaction zone within a one-dimensional gravel column by optimizing particle size and injection concentration and conducted simulated remediation experiments on 1,2-DCE. The results revealed that all 1,2-DCE passing through the in-situ reaction zone was completely removed within 630 min.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Analytical Methods
·
2022
·Vol. 15
·期 7
·2036-2047
·
IF 3.498
Gao Ming,Wang Hui,Wang Jun,Wang Xuedong,Wang Huili
Herein, we developed an effervescent reaction-enhanced dispersive liquid–liquid microextraction method for the preconcentration/extraction of bisphenols (BPs) in milk and milky tea samples. This microextraction method was based on the utilization of acidic ionic liquid (AIL) and in situ metathesis reaction (AI-EDLM). Compared to the traditional imidazolium-based ionic liquid, AIL can not only be used as an extractant, but also as an acidic source in the effervescent reaction. Under such a case, it can avoid the use of additional acidic source and also achieve a rapid dispersion effect due to vigorous CO 2 bubbles, which simplify the experimental procedures and decrease the preparation cost of effervescent tablets. By employing the one-factor-at-a-time approach, the main parameters were optimized as follows: 400 mg of [BMIM][HSO 4 ] as extractant, 100 mg of Na 2 CO 3 as alkaline source, 400 mg of Li[NTf] 2 as the ionic-exchange reagent, 4% of NaCl, 5 min of centrifugation and 1.5 mL of ether as the elution solvent. Under optimized conditions, the limits of detection ranged from 0.12 to 0.32 μg L −1 , and the extraction recoveries for BPA, BPB, and BPAF spanned the range of 85.7–106.2% in five kinds of milk samples. Therefore, the AIL ([BMIM][HSO 4 ]) played dual roles, i.e., extractant and pH regulator, in the AI-EDLM procedures. Overall, this proposed method is simple, quick, and environment-friendly with low detection limits and high recoveries for BPs, and thus has excellent application value in the sample pretreatment field in milk and milky tea samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）