Article
Engineering, Environmental
Siraprapha Deebansok, Taweechai Amornsakchai, Pannagorn Sae-ear, Punnama Siriphannon, Siwaporn Meejoo Smith
Summary: This study immobilized ZnO photocatalyst on very fine pineapple leaf fiber for removing colored pollutants from water stream. The research found that the defect structure in ZnO affects its color removal performance, with sphere-like ZnO showing higher photocatalytic activity. The ZnO immobilized on PALFs showed promise as an easily recoverable photocatalyst for wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Ceramics
Xiaoyang Jiao, Qinchuan He, Jie Feng, Qing Tan, Yiqun Wang, Xuemin Yin
Summary: The ablation resistance and mechanism of C/C-SiC-HfC and mullite modified C/C-SiC-HfC composites were investigated. The results showed that the mullite modified composite exhibited improved ablation resistance. The introduction of mullite promoted the formation of HfSiO4, inhibited the consumption of SiO2, and restricted the formation of porous HfO2, resulting in the formation of a stable and dense Hf-Si-Al-O composite oxide layer.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Yuan Ji, Shida Han, Zhiheng Chen, Hong Wu, Shaoyun Guo, Ning Yan, Hongyan Li, Tao Luan
Summary: This study explores the effect of carbon fiber length on the microstructure and ablation properties of silicone rubber-based ablative composites. It was found that carbon fibers longer than 3 mm can form a complete and continuous skeleton in the ceramic layer, leading to a decrease in ablation rate and back-face temperature.
Article
Chemistry, Physical
Xiaobin Wang, Peng Jiang, Yujian Tang, Weixu Zhang, Shengbo Shi
Summary: The microstructure of carbon fiber-reinforced carbon-matrix composites (carbon/carbon composites) has a significant impact on its ablation performance. In this study, a thermochemical ablation model based on the evolution behavior of the microstructure is proposed, which accurately predicts the ablation recession rate and surface temperature. Numerical analysis shows that the fiber orientation affects the ablation recession rate. Increasing factors such as fiber radius, radiation coefficient can improve the anti-ablation efficiency of carbon/carbon composites.
Article
Optics
Bing Dong, Zongwei Xu, Changkun Shi, Kun Zhang, Yuheng Zhang, Rushuai Hua, Wei Zhao, Jianshi Wang
Summary: In this study, a method for fabricating high-quality micro-nanostructures of 4H-SiC using vector polarized light was proposed. The influences of linear polarization and vector polarization on the quality and surface morphology of processed SiC microgrooves were studied. The study showed that using vector beam, especially azimuthal polarization beam, can ensure the uniformity of the processing area, reduce micro-cracks and obtain better processing quality.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Wei Ding, Hongyan Li, Hongli Liu, Yinghan Zheng
Summary: Composite aerogels with low thermal conductivity and antioxidation were prepared by introducing graphene oxide (GO) on the carbon nanofibers (CNFs) surface, followed by ceramic coating. The vertical morphology of GO on CNFs surface acted as an enhancer to hinder heat radiation transmission, while the shrinkage-resistant ceramic coating served as an antioxidant barrier.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Zhigang Zhao, Kezhi Li, Wei Li
Summary: ZrC-SiC-ZrB2 and ZrC-SiC inhibited carbon/carbon composites wedge shaped components were fabricated by reactive melt infiltration and tested on an oxyacetylene torch at a heat flux of 2.38 MW/m2 for 120 s. Compared with C/C composites, both inhibited composites components exhibited better ablation resistance with tip temperatures reaching about 2500 degrees C. Structural evolution on the surfaces of the inhibited composites components included a porous ZrO2 layer near the tip, layered structure of the outer ZrO2 layer, subsurface ZrO2-SiO2 layer in the intermediate region, and SiO2 layer in the tail.
Article
Materials Science, Multidisciplinary
Xinyu Wei, Wenjin Zhang, Longwei Chen, Xulu Xia, Yuedong Meng, Chengzhou Liu, Qifu Lin, Yiman Jiang, Shengtao Gao
Summary: Plasma technology is a green and novel method for carbon fiber graphitization. The effect of graphitization time on the main element content and microstructure of carbon fiber was investigated. Microwave plasma treatment increased the carbon content and graphitization degree of carbon fiber, and transformed the original imperfect graphite-like structure to an ordered graphite structure. Under specific temperature conditions, a high graphitization degree and large crystallite size were observed, resulting in improved tensile modulus of the samples.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Physical
Shabab Saad, Ali Shayesteh Zeraati, Soumyabrata Roy, Md Abid Shahriar Rahman Saadi, Jagos R. Radovi, Ashna Rajeev, Kristen A. Miller, Sohini Bhattacharyya, Stephen R. Larter, Giovanniantonio Natale, Uttandaraman Sundararaj, Pulickel M. Ajayan, Muhammad M. Rahman, Md Golam Kibria
Summary: This study investigates the feasibility and method of producing carbon fibers from low-value petroleum asphaltenes. By evaluating the physicochemical properties of asphaltenes and optimizing the spinning process, carbon fibers with high mechanical strength and Young's modulus were obtained. This study opens up a new avenue for the production of low-cost carbon fibers from low-value petroleum asphaltenes.
Article
Nanoscience & Nanotechnology
Yanhong Lu, Suling Zhang, Xiaorong Han, Xingchen Wan, Junlin Gao, Congcong Bai, Yingxue Li, Zhen Ge, Lei Wei, Yu Chen, Yanfeng Ma, Yongsheng Chen
Summary: In this study, 3D interconnected activated carbons with excellent specific surface area, meso-/macro-pore ratio, and electrical conductivity were prepared through hydrothermal carbonization and activation method. The materials displayed superior double-layer capacitive performance in an organic electrolyte system, with outstanding energy density, power density, and cycling stability. This study offers a practical method for the preparation of carbon electrode materials with controlled morphology and structure for high efficiency electrochemical energy storage devices.
Article
Materials Science, Multidisciplinary
Jing Yang, Ce Zheng, Shanshan Xu, Chong Wei, Cheng Zhang, Yichun Bi, Xiaoqiang Li
Summary: In this study, the radiation-induced microstructure evolution of M55J and T300 carbon fibers in C/SiC composites was investigated. Both carbon fibers exhibited axial shrinkage after irradiation, with M55J fibers showing slightly lower shrinkage compared to T300 fibers. Detailed microstructure characterization revealed disruptions in the graphite structure of both carbon fibers due to ion irradiation. The ordering degree of T300 fibers increased at low doses and decreased at higher doses, and possible mechanisms for the healing process in T300 fibers were discussed.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Multidisciplinary
Lichao Song, Weihua Xie, Dong Yu, Songhe Meng, Fan Yang, Fengliang Liu, Ying Zhang
Summary: The quantitative relationship between the microstructure behaviour and mechanical properties of heat-treated PAN carbon fibers was studied. It was found that increasing temperature led to an increase in the orientation of graphite crystals and the stress component along the fiber axial direction, resulting in an increase in Young's modulus. However, the tensile strength decreased due to the deterioration of the CF radial structure and a reduction in the stress dissipation path inside the CF. A theoretical model was developed to predict the CF tensile strength and Young's modulus, which showed a good agreement with the measured values.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
S. Fida Hassan, H. AlWadei
Summary: In this study, a microalloyed low carbon steel was transformed into a bainitic microstructure containing interlath and sporadic blocks of retained austenite through quenching and partitioning (Q&P) heat treatment processes. The applied heat treatment process effectively distributed carbon into the retained austenite, resulting in the steel acquiring a continuous yield with high yield strength, a gigapasca I level of ultimate tensile strength, and a very low yield ratio while maintaining reasonable ductility and toughness.
SCIENTIFIC REPORTS
(2022)
Review
Materials Science, Multidisciplinary
Kunming Li, Xuepeng Ni, Qianqian Wu, Chunshun Yuan, Changlei Li, Dong Li, Huifang Chen, Yonggen Lv, Anqi Ju
Summary: This paper reviews the current status of carbon-based fibers (CBFs), including their precursors, preparation methods, performance, and applications. The different types of precursor systems are discussed, and the relationship between preparation methods and performance of CBFs is presented. The paper also provides an overview of CBFs' applications and future development.
ADVANCED FIBER MATERIALS
(2022)
Article
Construction & Building Technology
Mohammad R. Irshidat, Nasser Al-Nuaimi, Mohamed Rabie
Summary: The study reveals that adding both CNTs and PP microfibers to cementitious composites can enhance the compressive and flexural strength of mortar at high temperatures, reduce residual fracture energy, and delay crack formation and propagation. However, the improvement is less significant when exposed to temperatures exceeding the melting point of the fibers.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
