Article
Construction & Building Technology
Fangjin Li, Yuhong Wang, Kecheng Zhao
Summary: This study aims to explore the physicochemical origins of property variations in aged asphalt binders. By testing the zero-shear viscosities (ZSVs) of the binders and their maltene phases, as well as examining the size of asphaltenes, it was found that asphaltene content and maltene viscosity can explain most of the commonly reported rheological properties of asphalt binders. However, asphaltene content alone cannot explain the fatigue performance of asphalt binders.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Polymer Science
Vijay Patel, Unnati Joshi, Anand Joshi, Blessing Kudzai Matanda, Kamlesh Chauhan, Ankit D. Oza, Diana-Petronela Burduhos-Nergis, Dumitru-Doru Burduhos-Nergis
Summary: This manuscript presents an experimental investigation of the friction and wear properties of PMMA nanocomposites reinforced with functionalized MWCNTs. The results indicate that the MWCNTs can effectively enhance the tribological performance of PMMA. The optimal MWCNT loading was found to be 0.5 wt.%, resulting in the lowest friction coefficient and wear rate.
Article
Chemistry, Physical
Qiang Yang, Xiaohan Wu, Wei Zhang, Zixaing Yan, Guodong Tong, Xuegang Chen, Shuhui Lv, Tao Xu, Jun Li, Xin Qiu
Summary: An ultrathin wall Mg-8Zn-8Al alloy with coarse ix-Mg grains, ultra-fine beta-Mg grains, and nano-sized icosahedral quasicrystal phase particles has been manufactured by high-pressure die casting. The alloy exhibits outstanding strength and acceptable elongation. The observations through HAADF-STEM reveal possible amorphous regions, C-containing phase and/or MgO aggregations, and Zn-rich clusters and pyramidal precipitates. The combination of ultra-fine grains and the skeleton consisting of nano-sized I-phase particles and solutes contributes to the ultra-high strength. In addition, the study indicates the unavoidable interaction of alloy melt with CO2 during ultra-thin wall HPDC and the possibility of pyramidal precipitation in Zn-containing magnesium alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Composites
Vijayakumar Nimbagal, N. R. Banapurmath, M. A. Umarfarooq, Suraj Revankar, Ashok M. Sajjan, Manzoore Elahi M. Soudagar, Kiran Shahapurkar, Mohammed A. Alamir, Ibrahim M. Alarifi, Ashraf Elfasakhany
Summary: This study investigated the effects of carbon nanofibers (CNFs) and a combination of CNFs and micro-sized short carbon fibers (SCFs) on the mechanical, thermal, and fracture properties of epoxy-PLA composite. The incorporation of both CNFs and SCFs into the composite resulted in improved tensile, flexural, impact strength, and fracture toughness. The combined fillers showed a synergetic effect on enhancing the mechanical properties of the composite.
POLYMER COMPOSITES
(2023)
Article
Biochemical Research Methods
Tong Xin, Yanan Lv, Haoran Chen, Linlin Li, Lijun Shen, Guangcun Shan, Xi Chen, Hua Han
Summary: This article proposes a new method for serial section registration using an unsupervised optical flow network to measure feature similarity and eliminate nonlinear deformation. The optical flow network is also used to estimate and compensate for cumulative registration error, enabling the reconstruction of biological tissue structures. Experimental results demonstrate that this method effectively improves the spatial continuity of serial sections and enhances the accuracy of registration and reconstruction for biological tissue structures.
Article
Mechanics
Zhan Guo, Chenglong Zhuang, Zhihui Li, Yu Chen
Summary: This paper presents an experimental investigation on the residual mechanical properties and microstructure of carbon fiber reinforced concrete (CFRC) after high temperatures. The addition of carbon fibers can effectively improve the flexural and splitting strength of CFRC, while the enhancement amplitude of compressive strength is quite limited. The optimum dosages of carbon fiber contents and carbon fiber length are 1.0 wt% and 10 mm, respectively.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Ceramics
Katharina Kruppa, Itzhak I. Maor, Frank Steinbach, Vadim Beilin, Meirav Mann-Lahav, Mario Wolf, Gideon S. Grader, Armin Feldhoff
Summary: Oxide-based ceramics offer promising thermoelectric materials for recycling high-temperature waste heat. In this study, electrospun nanofibers of calcium cobaltite were compacted to improve the functional performance of the material and achieve thermal stability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Michiel Larmuseau, Michael Sluydts, Koenraad Theuwissen, Lode Duprez, Tom Dhaene, Stefaan Cottenier
Summary: The potential of deep learning in materials science for microscopic analyses is highlighted, despite the challenge of limited image availability for model training. A methodology has been proposed to create accurate image recognition models with small datasets, incorporating material science insights efficiently through magnification considerations and appropriate transformations. The results demonstrate that models trained with this methodology can surpass human experts in performance.
SCRIPTA MATERIALIA
(2021)
Article
Construction & Building Technology
V. Vignesh, A. N. Balaji, B. Raja Mohamed Rabi, N. Rajini, N. Ayrilmis, M. K. Karthikeyan, Faruq Mohammad, Sikiru Oluwarotimi Ismail, Hamad A. Al-Lohedan
Summary: This paper focuses on hybrid and twisted hybrid Indian mallow/roselle fiber yarn mat reinforced polyester composites and the effects of wood sawdust filler. The mechanical properties of these composites were evaluated, showing improved performance with the addition of wood sawdust filler. Scanning electron microscopy was used to assess internal damage of the composite samples.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Chemistry, Physical
Qilong Feng, Chongzhi Zhu, Guan Sheng, Tulai Sun, Yonghe Li, Yihan Zhu
Summary: The resolution of scanning transmission electron microscopy (STEM) has reached atomic level, providing promising prospects for microscale characterization in various fields. However, the traditional STEM detector is limited in its detection mechanism, leading to the loss of angle-resolved information and reduced efficiency. To address this issue, the development of four-dimensional STEM (4D-STEM) technology, with advances in electron direct detection techniques and detectors, offers high-throughput and high-dose efficiency imaging.
ACTA PHYSICO-CHIMICA SINICA
(2023)
Article
Engineering, Manufacturing
Meilian Cao, Dong Wang, Jiqing Lu, Wanli Cheng, Guangping Han, Jianbo Zhou
Summary: Porous carbon nanofibers (PCNFs)@Tin oxide (SnOx) nanocomposites were synthesized by co-electrospinning, with different nanostructures obtained by changing the preheating temperature during heat treatment. Higher preheating temperature led to the coexistence of micropores and mesopores, resulting in a high specific capacitance of 229 F g(-1) at 0.2 A g(-1).
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Physical
Won-hyuk Lee, Yeonju Oh, Min-Gu Jo, Heung Nam Han, Yanghoo Kim
Summary: The effects of Nb content on microstructures and mechanical properties in Co-free CrFeNi2Nbx alloys were investigated. Increasing Nb content led to changes in microstructures and improved mechanical properties, with a reduction in ductility. The CrFeNi2Nb0.6 alloy achieved a high maximum fracture strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Environmental Sciences
Rong Huang, Qing Tian, Yue Zhang, Zhini Chen, Yonghua Wu, Zizhen Li, Zebin Wen
Summary: This study investigated the effect of environment and leaf microstructure on particulate matter retention in 10 plant species in four urban areas. The findings showed that both the environment and leaf microstructure significantly influenced PM retention, and different plant species exhibited varying abilities to retain PM in different environments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Construction & Building Technology
Xiangdong Zhang, Jie Geng, Shuai Pang, Lijuan Su, Guanjun Cai, Zhongchao Zhou
Summary: The effects of cement content, fiber content, and fiber length on the splitting tensile strength of cement-stabilized aeolian sand were analyzed using the splitting tensile strength test and range method. The results showed that the splitting strength was influenced the most by the cement content, followed by the fiber length and fiber content. The addition of 0.24% 9-mm fiber and 9% cement maximized the splitting strength. The mechanical properties of cement-stabilized aeolian sand were improved by the formation of a three-dimensional fiber network, which dispersed the external load and reduced stress concentration effects.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Zhuorui Lu, Natalia Vakula, Michele Ude, Martiane Cabie, Thomas Neisius, Francois Orange, Franck Pigeonneau, Laeticia Petit, Wilfried Blanc
Summary: For the first time, MCVD germanosilica glass embedded with YbPO4 crystals were drawn into optical fibers. The YbPO4 crystals were successfully embedded in the silica soot using solution doping prior to the collapsing step. Through analysis with scanning/transmission electron microscopes and confocal Raman microscope, it was demonstrated that the YbPO4 crystals survived both the MCVD process and the drawing process, despite the high temperature (up to 2100 degrees C) involved. The fiber contained 100 nm-crystals with the same composition and structure as the as-prepared crystals, and during the drawing process, these crystals showed a preferential orientation along the c-axis.
Article
Polymer Science
Said H. Zoalfakar, Mostafa A. Mohamed, Mohamed A. El-Hamid, Ashraf A. Ali
POLYMERS FOR ADVANCED TECHNOLOGIES
(2019)
Article
Materials Science, Multidisciplinary
Ahmed Abdel Ghaffar Abdel Maboud, Nahed A. El-Mahallawy, Said H. Zoalfakar
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
Saleh S. Abdelhady, Said H. Zoalfakar, M. A. Agwa, Ashraf A. Ali
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
Nahed A. El-Mahallawy, Said H. Zoalfakar, Ahmed Abdel Ghaffar Abdel Maboud
MATERIALS RESEARCH EXPRESS
(2019)
Article
Nanoscience & Nanotechnology
Saleh S. Abdelhady, Said H. Zoalfakar, M. A. Agwa, Ashraf A. Ali
Article
Materials Science, Composites
Saleh S. Abdelhady, Said H. Zoalfakar, M. A. Agwa, Ashraf A. Ali
Summary: Basalt fibers were treated with a mixture of formic acid and dichloromethane to reduce their diameter, and then used to reinforce nylon 6,6/epoxy composites through electrospinning. The addition of treated basalt fibers significantly improved the mechanical properties and thermal stability of the nanofiber composites.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Article
Materials Science, Composites
A. S. Fayed, K. A. Abu-Hasel, Sameh M. Mahdy, Ashraf A. Ali
Summary: Ultra-fine fibril composites were produced by electrospinning polymer solutions with different concentrations of three-dimensional graphite nanoplatelets (3D-GNPs). The addition of 3D-GNPs improved the mechanical and thermal properties of the fibers compared to pure PS fibers. High-resolution microscopy confirmed homogenous dispersion of 3D-GNPs in the composite, showing potential applications in industries such as vehicles and aerospace.
POLYMER COMPOSITES
(2021)
Review
Polymer Science
Mohamed Kchaou, Mohammed Alquraish, Khaled Abuhasel, Ahmad Abdullah, Ashraf A. Ali
Summary: Over the past twenty years, researchers have made significant progress in the development of electrospinning technology, with applications in biosensing, drug delivery, tissue repair, and wound healing. Despite challenges in scaffold design and properties, electrospinning is considered a promising emerging technology.
Article
Engineering, Mechanical
A. A. Megahed, Mostafa A. Mohamed, M. Abdel Hamid, Said H. Zoalfakar
Summary: Friction stir processing (FSP) is an effective technique to improve the microstructures and mechanical properties of metals. In this study, the effects of FSP parameters on the mechanical and wear properties of AA6061/WC nanocomposites were investigated. The results showed that the proper selection of parameters led to a defect-free nanocomposite with improved hardness and reduced weight loss, due to the dispersion of particles and formation of ultrafine grains.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Mechanical
Said H. Zoalfakar, Mostafa A. Mohamed, M. Abdel Hamid, A. A. Megahed
Summary: Friction stir processing (FSP) is a modern manufacturing strategy used to improve the surface characteristics of materials. This research focuses on optimizing the process parameters for producing tungsten carbide-reinforced 6061 aluminum alloy surface composite using FSP. The results indicate that the proper selection of FSP parameters results in defect-free nanocomposites with homogeneous particle distribution and an ultrafine grain-sized structure.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2022)
Article
Materials Science, Textiles
Saleh S. Abdelhady, M. M. Atta, A. A. Megahed, K. A. Abu-Hasel, Mohammed Alquraish, Ashraf A. Ali, Said H. Zoalfakar
Summary: This study attempted to model the diameter of Poly Lactic-co-Glycolic Acid (PLGA) nanofibers using response surface methodology (RSM) and artificial neural networks (ANNs), aiming to determine the optimal electrospinning process conditions for producing the smallest fiber diameter. The results showed that ANN performed better in predicting nanofiber diameter compared to RSM, and the optimal network structure was determined. The experimental and predicted results demonstrated a strong correlation, indicating the good predictability of the ANN model. The RSM model yielded the optimum combinations for electrospinning PLGA nanofibers that can achieve fine, consistent, and high-quality results.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Proceedings Paper
Materials Science, Composites
N. A. El-Mahallawy, S. H. Zoalfakar, A. A. G. A. Maboud
6TH GLOBAL CONFERENCE ON POLYMER AND COMPOSITE MATERIALS (PCM 2019)
(2019)
