Article
Chemistry, Physical
Yang Liu, Jingmei Tao, Yichun Liu, Yong Hu, Rui Bao, Fengxian Li, Dong Fang, Caiju Li, Jianhong Yi
Summary: The study improved the interface bonding issue in CNTs reinforced Cu matrix composites by forming TiC on the surface of CNTs, enhancing the mechanical properties of the composites and achieving significant strengthening efficiency.
Article
Materials Science, Ceramics
H. Y. Hong, D. H. Kim, K. Park
Summary: In this study, the thermoelectric properties of Bi0.97Na0.03CuSeO were systematically investigated by doping Mg2+ ions. The Mg2+ doping significantly enhanced the electrical conductivity by increasing hole concentration and reducing phonon thermal conductivity. By improving the thermoelectric power factor and reducing the thermal conductivity, the thermoelectric performance of Bi0.97Na0.03CuSeO was significantly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Jing-Jing Tian, Yue-Cong Cao, Heng Tian, Yong-hao Xu, Guo-dong Wang, Yu-Jun Feng
Summary: The study found that with the increase of ZnO varistor content, the dynamic mechanical, thermal, and dielectric properties of composite materials change significantly, leading to a significant impact on the performance of the composites.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Junqin Feng, Jingmei Tao, Xiaofeng Chen, Hui Zhang, Yichun Liu, Rui Bao, Xuhui Xu, Caiju Li, Jianhong Yi
Summary: To address the trade-off between mechanical and electrical properties in carbon nanotubes (CNTs)/Cu composites, a pre-decorated strategy involving the introduction of WC nanoparticles on CNTs (WC@CNTs) was proposed. The research found that WC was epitaxially grown on the CNTs with an epitaxial orientation relationship (OR) of WC(001) / /CNTs(0002), resulting in a robust WC-CNTs interface and enhanced bonding strength of CNTs-Cu interface. The designed CNTs-WC-Cu interface not only ensured accurate stress/strain transmission but also improved interfacial conductivity, leading to superior mechanical and electrical properties compared to CNTs/Cu composites.
Article
Materials Science, Ceramics
Kyeong Eun Song, Harald Schlegl, Chan Gyu Kim, Ki Sang Baek, Yu Ri Lim, Jung Hyun Nam, Hyun Suk Kim, Jung Hyun Kim
Summary: The electrical conductivity characteristics of SmBaCo2O5+d (SBCO) and SmBa0.5Sr0.5Co2O5+d (SBSCO) were studied by changing the microstructure characteristics. SBCO and SBSCO with dense microstructure showed different conductivity behaviors, while the porous cathode showed high semiconductor conductivity. The porous cathode exhibited higher conductivity when the measurement temperature was decreased.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Composites
Shengfei Hu, Bingfeng Xu, Yang Zhao, Xudong Fu, Qingting Liu, Rong Zhang
Summary: Conductive and thermal conductive polymer composites with segregated network structures were prepared by the Pickering emulsion method. The inclusion of carbon nanotubes (CNTs) as bridges improved the conductivity and thermal conductivity of the composites. This study provides a convenient and time-saving approach for the study of segregated structural thermally conductive composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yunyang Wang, Shengwei Sun, Liqing Zhang
Summary: This paper investigates the synergistic modifying effect of hybrid NGPs/CNTs/NCBs on mechanical performances, electrical conductivity, and self-sensing property of cementitious composites. Experimental results show that cementitious composites incorporating 4.0 wt% hybrid NGPs/CNTs/NCBs exhibit excellent compressive strength, electrical resistivity and stress/strain sensitivity. The hybrid NGPs/CNTs/NCBs endow cementitious composites with excellent electrical conductivity and stable sensitive piezoresistivity, making them a promising material for structural health monitoring of concrete structures.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Ceramics
Guohua Fan, Ting Feng, Yunpeng Qu, Chuncheng Hao, Yao Liu
Summary: In this study, carbon nanotubes/TiN/CaCu3Ti4O12 ternary composites were prepared, and the effects of dual fillers on the dielectric properties of the composites were investigated. The composites exhibited a capacitive-inductive transition and negative permittivity, which was regulated by changing the filler content or adjusting the microstructure. The conduction loss dominated the dielectric loss mechanism of the composites. The clarification of the realization and regulation mechanism of negative permittivity provides insights for the preparation and development of negative permittivity materials.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yi-Hai Yang, Sheng-Yao Li, Zhen-Shan Cui, Zhou Li, Yun-Ping Li, Qian Lei
Summary: The addition of titanium in high-strength Cu-Ni-Si alloys improves mechanical properties by refining the microstructure, suppressing the decreasing trend in mechanical properties, and arousing a primary substructure strengthening mechanism.
Article
Materials Science, Ceramics
Chhavi Mitharwal, Sakshi Mishra, Garima Paliwal, Sakshi Mittal, Supratim Mitra
Summary: The study indicated that incorporating 0.04 mol of MnO2 into (Ca0.4Sr0.6)Bi4Ti4O15 material can result in dense microstructure, increased relative density, and stable electrical properties at high temperatures.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Miray Celikbilek Ersundu, Ali Ercin Ersundu, Ondrej Bosak, Marian Kubliha, Petr Kostka
Summary: A series of glasses in the ZnO-MoO3-TeO2 system were synthesized and investigated for their thermal, optical, structural, and electrical properties. Substitution of TeO2 for ZnO and/or MoO3 resulted in structural transformation and decomposition of the tellurite network. The major charge transport mechanism in these glasses is the polaronic process through the tellurite glass network. Molybdenum oxide positively affects the electrical conductivity of the glasses, while Zn2+ ions limit free electron transport. These glasses with wide optical transmittance and relatively high electrical conductivity may find application in optoelectronic devices.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Composites
Yuan Fang, Long-Yuan Li, Sung-Hwan Jang
Summary: This paper presents an analytical model to describe how mechanical deformation affects the effective electrical conductivity of CNTs reinforced composites. The model identifies two mechanisms through which mechanical strain influences the conductivity, and provides analytical formulations for calculating this relationship. Validation of the model is performed using experimental data from literature on CNTs reinforced polymer composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xiong Yang, Yanxia Wang, Ruonan Min, Zongning Chen, Enyu Guo, Huijun Kang, Linwei Li, Xue Jiang, Tongmin Wang
Summary: In this study, the thermal and electrical conductivities of ZrNiSnbased alloys were synergistically optimized by Ta doping and Hf substitution. The introduction of Ta and Hf resulted in increased electrical conductivity and reduced lattice thermal conductivity, leading to a significantly enhanced thermoelectric performance.
Article
Chemistry, Physical
W. A. Shah, X. Luo, B. Rabiu, B. Huang, Y. Q. Yang
Summary: Graphene/CNTs-reinforced alumina ceramic composites were prepared using the spark plasma sintering method at 1500 degrees C, with a study on the distribution behaviors of reinforcements and mechanical properties. Various toughening mechanisms were observed, and the thermal conductivity of the composites was discussed in relation to grain size. The experimental results provided insights into the properties and behavior of these nanocomposites.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Yoku Inoue, Kohei Hayashi, Motoyuki Karita, Takayuki Nakano, Yoshinobu Shimamura, Keiichi Shirasu, Go Yamamoto, Toshiyuki Hashida
Summary: Changing the diameter of MWCNTs can affect the mechanical and electrical properties of MWCNT yarns, and the improvements in performance are due to the increase in the surface area of MWCNTs in the yarn structure.
Article
Engineering, Multidisciplinary
A. N. Fouda, El Shazly M. Duraia, Ali A. Almaqwashi
Summary: A feasible, low-cost, environmentally friendly, and scalable method for synthesizing N-doped graphene/CNTs composite using humic acid and urea via ball mill technique has been demonstrated. Structural characterizations were conducted using SEM, Raman spectroscopy, and XRD, which revealed the crucial impact of urea and HA on the synthesis process, as well as the N-doping confirmed by EDX measurements and significant increase in surface area detected by BET analysis.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Omer Guler, Muekremin Tekeli, Mustafa Taskin, Seval Hale Guler, I. S. Yahia
Summary: The study optimized production parameters of liquid phase exfoliation method for graphene production, determining NMP as the most efficient liquid media and finding that a new hybrid solvent with SDS showed higher efficiency than NMP. The research also observed that 3-5 layer graphene content ranged between 15 and 19 wt% in the produced graphene samples, with the most efficient production seen in hybrid solvents containing NMP or SDS.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Composites
Omer Guler, Nihal Bagci, Seval Hale Guler, Canan A. Canbay, Hasan Safa, Taha A. Yilmaz, Mustafa Taskin
Summary: The research found that increasing the amount of graphene can improve the electrical, thermal, and mechanical properties of the composite materials, but too much graphene may cause fractures during the ECAP process. Significant improvements were observed in the properties of the composites after ECAP processing, and low amounts of graphene reinforcement can help the composites better respond to the ECAP process.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Omer Guler, Tuncay Simsek, Iskender Ozkul, Baris Avar, Canan A. Canbay, Arun K. Chattopadhyay, Seval H. Guler
Summary: High entropy alloy (HEA) with shape memory effect and multi elemental high entropy shape memory alloys (HESMA) have attracted significant research interest. The study successfully developed nano-crystalline HEA powder with shape memory effect through mechanical alloying. Thermal analysis revealed that enthalpy values, equilibrium temperature (T0), and crystallization temperature values decreased with increasing milling time.
CURRENT APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Asmaa Mahmoud Ahmed, El-Shazly M. Duraia, A. N. Fouda
Summary: In this study, graphene-manganese oxide hybrid nanostructures (G/MnO2) were synthesized through rapid and facile microwave irradiation technique. The samples were characterized using standard techniques such as SEM, TEM, XRD, and Raman spectroscopy. The results showed that the G/MnO2 composite exhibited improved conductivity and energy storage capability, indicating promising applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
A. N. Fouda, E. A. Eid
Summary: The incorporation of 0.5 and 1.0 wt% GO with Sn-6.5Zn-0.4 wt% Cu in solder alloys leads to refined grain size, enhanced tensile parameters, and a shift in deformation mechanism. Increasing GO content increases the activation energy and transitions the diffusion mechanism.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Telem Simsek, Iskender Ozkul, Canan Aksu Canbay, Baris Avar, Tuncay Simsek, Seval Hale Guler, Sadan Ozcan, Omer Guler, Arun K. Chattopadhyay
Summary: This study discusses the structural, morphological, thermal, and magnetic properties of equiatomic CoNiMnGaSi (base), CoNiMnGaSiCu, CoNiMnGaSiSn, and CoNiMnGaSiSb alloys. XRD and DTA techniques were used to determine the formation of a solid-solution nanocrystalline bcc structure. SEM-EDS analyses showed the homogeneous distribution of elements. The addition of Cu and Sn decreased the saturation magnetization, while the addition of Sb had no significant effect. CoNiMnGaSiSb exhibited the highest Curie Temperature of 670 K, making it a promising candidate for power industry-related applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Esra Kavaz, Ali Oktay Gul, Oykum Basgoz, Omer Guler, Ghada ALMisned, Ersin Bahceci, Seval Hale Guler, H. O. Tekin
Summary: This study presents the synthesis and extensive characterization of newly developed boron nitride nanosheet (BNNSs)-reinforced WNiCoFeCr high-entropy alloys (HEAs). The influence of B4C on the structural, physical, mechanical, and nuclear shielding characteristics of HEAs is examined, and the shielding characteristics are compared to other materials.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Correction
Materials Science, Multidisciplinary
Esra Kavaz, Ali Oktay Gul, Oykum Basgoz, Omer Guler, Ghada ALMisned, Ersin Bahceci, Seval Hale Guler, H. O. Tekin
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
A. N. Fouda, El Shazly M. Duraia
Summary: In this study, copper-manganese bimetallic oxide nanoparticles were successfully created on the surface of carbon nanotubes using a simple method. Copper sulfate and potassium permanganate were used as the sources for Cu and Mn, respectively. The size of the nanoparticles increased from 9 to 45 nm as the annealing temperature rose from 250 to 450 degrees C. XRD and FTIR analysis confirmed the existence of copper-manganese bimetallic oxide phases. Increasing the annealing temperature also improved the crystallinity of the material, as observed from the XRD data. Broadband dielectric spectroscopy was used to investigate the dielectric characteristics with varying applied frequencies.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Article
Metallurgy & Metallurgical Engineering
Seval H. Guler
Summary: This study examined the effect of using ferro-alloys instead of pure metals in the AlCoFeNiMoTi alloy. It was found that the mechanical properties of the alloy were significantly degraded when ferro-alloys were used. This is believed to be associated with the presence of inclusions and other residues in ferro-alloys.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Physics, Multidisciplinary
A. N. Fouda, Ali A. Almaqwashi
Summary: In this study, partial unzipping of multi-wall carbon nanotubes (MWCNTs) was achieved using a strong oxidizing agent, confirmed by TEM and SEM images. The influence of oxidation on morphology, crystalline quality and dielectric properties was investigated. Additionally, DNA interactions with partially unzipped carbon nanotubes were computationally assessed and their biomolecular implications were discussed.
