CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiangtao Li,Xiaoxia Hu,Junpeng Jiang,Anran Guo,Liwen Yan,Haiyan Du,Linlin Guo,Jiachen Liu
Ceramic fiber fabric embrittlement at 1200 °C, resulting in poor tensile strength. In order to improve the tensile strength of ceramic fiber fabric after high temperature heat treatment. In this study, gradient coating is sprayed on the surface of ceramic fiber fabric by adjusting the composition of two kinds of slurry. The structure and property of ceramic fiber fabric with different coating are thoroughly investigated. The pore size of Al 2 O 3 -SiC porous transition layer is less than 1 μm, which limits the infiltration of the high-emission coating into the ceramic fiber fabric. A weak bond is formed between the ceramic fiber fabric and the porous transition layer, which induces the crack deflection. The flexibility of ceramic fiber fabric after heat treatment is significantly improved. After being heated by butane flame at 1200 °C for 20 min, the tensile strength of fiber fabric with gradient coating is double that of raw ceramic fiber fabric. The silicone cross-links to form a network, which improves the bonding strength of the gradient coating. Due to the high emissivity and low thermal conductivity of the gradient coating, the temperature of the ceramic fiber fabric is below 900 °C when heated by the butane flame.
研究领域:
材料科学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiaohui Yuan,Lei Wen,Chao Wang,Yushun Zhao,Yingchun Zhou,Gong Cheng,Chenxi Zhao,Xiaodong He,Chao Sui
Ceramic fiber materials with high mechanical robustness and outstanding thermal stability are highly sought for high-temperature thermal insulation applications. However, the practical use of traditional ceramic fibrous mats has been hindered by their limited tensile strength, resulting in ceramic fibrous mats being easily deformed or broken under actual conditions. In this study, we present the fabrication of biomimetic, cocoon-like Al 2 O 3 -SiO 2 composite fibrous mats incorporating amorphous SiO 2 , γ-Al 2 O 3 , and mullite phases through the centrifugal spinning technique. The maximum tensile strength of these composite mats is determined to be 5.35 MPa, which is superior to most ceramic fiber materials. Additionally, the Al 2 O 3 -SiO 2 composite fibrous mats demonstrate excellent thermal insulation properties, with a thermal conductivity as low as 0.026 W/(m·K) at room temperature and 0.14 W/(m·K) at 1000 °C. These exceptional characteristics position Al 2 O 3 -SiO 2 composite fibrous mats as promising materials for thermal insulation in industrial, aerospace, and other demanding environments.
研究领域:
材料科学
·
陶瓷
·
热工工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Engineering Materials
·
2024
·
IF 0
Bingying Gao,Yunyun Sun,Xuzhang Sun,Chao Yao,Linqiang Mao
The chemical conversion of discarded poly(ethylene terephthalate) (dPET) into functional materials presents a promising approach to waste disposal. However, the loss of flexibility and tensile strength significantly limits the practical application of these fabricated materials. This work aims to develop a simple and effective approach to convert dPET into functional materials with flexible properties through molecular structure reconstruction. Molecular structures─C10H11ClO3, (C7H4O2)n, and C15H14O3─were formed through the introduction of styrene butadiene styrene block polymer to react with dPET. These three products were embedded into a viscous fluid in rodlike or sheet-like shapes, and homogeneous and stable cross-linked structures were formed by physical and chemical bonds rather than a simple physical mixture, which is responsible for the good tensile strength, corrosion resistance, and weather resistance properties of the flexible material. The resulting flexible material had a tensile strength of up to 4.2 MPa. Even after 50 cycles of stretching at 80% elongation without a dwell time, the sample retained its resilience. The material also exhibited good corrosion and weather resistance, with no deformation or dissolution observed even after 30 h of exposure to harsh environments, including strong acids, alkalis, and salt solutions. When exposed to simulated sunlight for 6 h, the sample exhibited a strong resistance in the 200–340 nm range. Overall, the successful fabrication of dPET into flexible materials presents a simple and effective approach to the high-value disposal of waste plastic. The resulting samples show potential applications in various areas such as soft joints, shock absorbers, and pipe shock absorbers.
研究领域:
材料科学
·
高分子化学
·
环境工程
✓ 已验证
DOI
Materials Today Communications
·
2025
·
IF 4.5
Xiaojing Liu,Chonghe Xu,Lin Wang,Rongchao Jiang,Liguang Yang,Wenyu Yang,Xuetao Yue
Ceramic fibers have emerged as a promising candidate for advanced thermal insulation applications due to their exceptional thermomechanical properties and chemical resistance. In this work, Mg(-Al/Zr)-Si ceramic fibers were successfully prepared via electrospinning technology using a dual-source precursor strategy, combining magnesium citrate complex and metal chlorides as metal oxides precursors. The crystalline phase formation, thermal decomposition behavior, microstructure, and properties of the fibers were systematically investigated using X-ray diffraction (XRD), thermogravimetric-differential scanning calorimetry (TG-DSC), Fourier transform infrared spectroscopy (FT–IR), and scanning electron microscopy (SEM). The heterogeneous sol precursor notably influenced the fiber crystallization process and facilitated more gradual thermal decomposition, as evidenced by reduced weight loss rates. Consequently, the Mg(-Al/Zr)-Si ceramic fibers maintained good structural integrity after exposure to 1200 °C. Moreover, the incorporation of aluminum or zirconium enhanced the tensile strengths of fibers (heat treated at 800 °C) to 1.56–1.79 MPa, representing a significant improvement over pure magnesium silicate fibers. Furthermore, the fibers exhibited good thermal insulation performance with low room-temperature thermal conductivity values ranging from 0.0282 to 0.0333 W·m −1 ·K −1 , further highlighting their suitability for high-temperature insulation applications. These findings underscore the significant potential of the developed fibers for use in high temperature thermal management and insulation systems.
研究领域:
材料科学
·
无机非金属材料
·
纳米材料
·
热功能材料
·
高温绝缘技术
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2739-2746
·
IF 9.6
Xie Yong-Shuai,Cheng Yuan,Lyu Yang,Li Rui,Han Jie-Cai
Based on the fact that it is challenging for the polymer flexible circuit substrates to meet the requirements of serving in high-temperature environments, this work proposed the idea of using printable ceramic fiber paper as a high-temperature flexible circuit substrate. A ceramic fiber paper with all ceramic components had been developed via electrospinning, solving the problems of low strength and severe strength drop at high temperatures of traditional ceramic fiber paper. The tensile strength of the prepared ceramic fiber paper is 2.63 MPa, and the reliable service temperature is 1200 °C. Its bulk density is about 1.5 times that of traditional ceramic fiber paper. It can be printed with patterns by commercial inkjet printers like ordinary printing paper and has excellent printability. The feasibility of ceramic fiber paper as a flexible circuit substrate was verified by constructing a simple circuit. When the fiber paper is significantly bent, the circuit still forms a complete path, which proves that it has a strong application potential for high-temperature flexible circuit substrate and is expected to promote the development of flexible electronic devices serving at extreme high-temperature environments. Graphical abstract
研究领域:
材料科学
·
纳米技术
·
电子工程
·
陶瓷
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2010
·
IF 0.792
Gang Zhang,Ti-Peng Zhao,Yan-Lun Wang,Sui-Lin Liu,Sheng-Ru Long,Jie Yang
Two kinds of new aromatic diamine monomer containing thio-amide unit, bis[4-(p-aminothiophenyl)benzoyl]diamine (ATPBA), were synthesized by two steps, which was reacted with 1,1′-Ferrocenedicarbonyl Chloride (FCDC) to prepare a new polyamide containing ferrocene and thio-ether unit. The polymers were characterized by FT-IR spectrum, 1H-NMR spectrum, X-ray diffraction, element analyzer, DSC, TGA, SEM, AFM and dissolvability experiment and so on. The intrinsic viscosity of FC-PASAA was 0.42–0.58 dl/g obtained with optimum synthesis conditions. The polymers were found to have excellent thermal performance with glass transition temperature (T
g
) of 229.9–276.8°C, initial degradation temperature (T
d
) of 389.2–391.5°C. They could afford flexible and strong films with tensile strength 66.0–83.9MPa. They showed improved solubility in polar aprotic solvents. They were used to preparing separation membrane successfully.
研究领域:
高分子化学
·
材料科学
·
金属有机化学
·
化学合成
·
热分析
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2018
·
IF 3.414
Xiaofeng Chen,Jingmei Tao,Jianhong Yi,Yichun Liu,Caiju Li,Rui Bao
Unique architecture of reinforcement is explored for developing advanced metal matrix composites (MMCs). In the present study, Cu matrix composites reinforced by carbon nanofillers with reticulate structure were prepared by powder metallurgy . It was found that the high-efficiency strengthening effect was achieved by employing the hybrids of carbon nanotubes (CNTs) and reduced graphene oxide (RGO) as reinforcements in the Cu matrix. The tensile test results showed that the ultimate tensile strength of ~ 409 MPa was achieved in Cu matrix composite with 1.5 vol% of CNT-RGO hybrids, which is significantly higher than that reinforced with individual CNTs or RGO (~ 226 and ~ 259 MPa, respectively). Strengthening mechanisms including grain refinement, generation of dislocations by thermal mismatch, load transfer and Orowan looping system were discussed to understand the strengthening behaviors of CNT-RGO hybrids in MMCs. This work underscores the importance of interconnected architecture of reinforcements for improving mechanical properties of the composites and provides an insight to understand the strengthening behaviors of reticulate reinforcements in the composites.
研究领域:
材料科学
·
复合材料
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2025
·
IF 5.2
Aofei Zhang,Xiaoyu Du,Jianglong Li,Jianlong Wen,Lang Shuai,Yongqiang Ming,Yijing Nie
How to effectively improve the strength and toughness of polymer elastomers is important for the expansion of their application fields. Construction of two distinct types of dynamic reversible bonds within elastomers represents an effective strategy for enhancing their mechanical properties. However, the interplay mechanisms between different dynamic reversible bonds have not been fully studied. Herein, we constructed both a hydrogen bond network and a metal coordination network in polyurethane (PU) elastomers. The introduction of both weak hydrogen bonds and strong metal coordination bonds can endow the elastomers with high tensile strength without the sacrifice of stretchability. This special phenomenon can be attributed to the dynamic synergistic mechanisms between the hydrogen bond network and coordination bond network. In short, the presence of strong coordination bonds can promote the orientation of local segments, while the recombination of weak hydrogen bonds can cause the relaxation of locally oriented segments.
研究领域:
高分子科学
·
材料工程
·
物理化学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiaheng Qiu,Min Niu,Lei Su,De Lu,Kang Peng,Hongjie Wang
Aerogel fibers have attracted significant interest due to their low thermal conductivity and notable flexibility. This flexibility enables them to be bent, tied, and woven into fabrics, thereby broadening their applications. However, current aerogel fibers suffer from limited environmental stability and a complex manufacturing process. Herein, a novel rotation lifting and spinning method is proposed to fabricate continuous and flexible ceramic aerogel fibers using ceramic nanowires and ethanol as the starting materials. The synthesized Si3N4 aerogel fiber (SNAF), composed of Si3N4 nanowires, achieves a high porosity of 98.5% and notable tensile strength reaching 3.5 MPa. Moreover, the fiber exhibits high thermal insulation capabilities, fire resistance, and remarkable high-temperature stability, which maintains its high strength and flexibility over a wide temperature range from −196 to 1000 °C. This study makes progress in the synthesis of ceramic aerogel fibers and broadens their applications in various high-temperature scenarios.
研究领域:
材料科学
·
纳米技术
·
陶瓷材料
·
热绝缘
·
纤维制备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 28
·2400197
·
IF 18.5
Xu Zhao,Derui Kong,Jinlong Tao,Na Kong,Pablo Mota-Santiago,Peter A. Lynch,Yanqiu Shao,Jizhen Zhang
Carbon nanotubes (CNTs) are promising blocks for building advanced yarns with unique structural and functional attributes. However, the complexity of fabrication and high cost has hindered the widespread adoption of CNT yarns. In this study, a rapid and continuous twisting wet spun yarn strategy to produce highly densified CNT yarns is presented. The method involves effectively dispersing CNTs in the surfactant dispersion, swiftly removing the surfactant in the coagulation bath and twisting treatment to effectively improve the density of yarn and the orientation of CNT. Detailed characterizations on the influence of each spinning conditions reveal that twisting treatment significantly enhances the packing density of yarns, improves the orientation of CNTs, and mitigates the impact of impurities on conductivity. The resulting CNT yarns exhibit a remarkable tensile strength of 600 MPa, a Young's modulus of ≈40 GPa, and a high conductivity of 8990 S cm −1 . When utilized as a yarn heater, the CNT yarn demonstrates an ultra-fast electrothermal response of over 1000 °C s −1 at a low operating voltage of 5 V. Impressively, the mechanical properties of CNT yarns show good stability during heating. This study provides a perspective of structural engineering for the large-scale preparation of high-performance CNT yarns.
研究领域:
材料科学
·
纳米技术
·
纺织工程
·
碳材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Ben Ma,Kai Li,Bo Chi,Jian Pu,Jian Li
LaNbO 4 –NiO–Y 2 O 3 stabilized ZrO 2 (YSZ) composites are prepared and investigated as an anode-support material for solid oxide fuel cells. To tailor the coefficient of thermal expansion (CTE), electrical conductivity, fracture strength σ and fracture toughness K IC of the composite, various amounts of LaNbO 4 from 0 to 30 wt.% are added into 53 wt.% NiO–47 wt.% YSZ composite. With LaNbO 4 addition into the NiO–YSZ, σ changes insignificantly, whereas CTE decreases and K IC increases monotonously. For 30 wt.% LaNbO 4 –NiO–YSZ, the CTE is 12.4 × 10 − 6 K − 1 (250–1000 °C), which is much closer to that of YSZ, and the K IC is 3.1 MPa-m 1/2 , which is 42% increase compared with that of the NiO–YSZ. The increase in fracture toughness is possibly due to the domain switch within LaNbO 4 and the overall grain refinement of the composite. The electrical conductivity of the reduced composites decreases with increasing the amount of LaNbO 4 and shows metallic conducting behavior with temperature.
研究领域:
材料科学
·
能源工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Siqi Xiang,Hanzhi Hu,Yihan Liang,Xinfang Zhang
Stoichiometric TiC and Cu are naturally non-wetting thus hindering application of the TiC-reinforced phase in Cu-matrix composites. In this study, stoichiometric TiC was converted to sub-stoichiometric TiC x through ball milling . The TiC x reinforced the Cu matrix after electropulsing-assisted flash sintering. When the content of C atoms in TiC x is sufficiently low, TiC x can form a good metallurgical bond with the Cu matrix. The hardness of the pure Cu matrix increased from 124 HV to 280 HV, and the strength increased from 347 MPa to 580 MPa when reinforced by 10 wt% TiC 0.6 . The activity of Ti in TiC 0.6 with a low carbon content is enhanced; thus, its dissolution in the Cu liquid melt is increased. The Ti atoms in liquid Cu facilitates interface bonding. The use of sub-stoichiometric TiC x to strengthen Cu-matrix composites is a promising strategy to expand the application of Cu-matrix composites.
研究领域:
材料科学
·
金属基复合材料
·
粉末冶金
·
界面工程
·
材料加工工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）