Article
Mechanics
Yuan Chen, Lin Ye, Hang Dong
Summary: In this study, a novel lightweight 3D composite lattice structure with zero coefficient of thermal expansion (CTE) was developed and investigated. A base planar composite lattice was first manufactured using continuous carbon fiber reinforced polyamide (CCF/PA) and short carbon fiber reinforced polyamide (SCF/PA) strips. A numerical model was validated and used to calculate a 3D composite lattice structure with a negative effective CTE of -0.18 x 10-6/degrees C. Parametric analysis and optimization were performed to improve the density and CTE of the lattice structure. The results showed significant improvements in both parameters, demonstrating the effectiveness of the design in achieving high thermal-dimensional stability.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Physical
Morteza Tayebi, Mahdi Tayebi, Mohammad Rajaee, Vahid Ghafarnia, Asiye Mobasheri Rizi
Summary: The study found that in Al/Cu/SiC composites, SiC and Cu particles were uniformly distributed, forming a continuous Cu network structure which improved the hardness of the composites. Thermal cycle examination showed that as the number of cycles increased, the thermal strain of the composites also increased.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ningning Dong, Jinhui Wang, Hongbin Ma, Peipeng Jin
Summary: The study found that the coefficient of thermal expansion decreases with increasing Nd content, and the alloy annealed at 325 degrees Celsius exhibits the best thermal stability. Annealing treatment eliminates partial residual stress, but increases the amount of Mg41Nd5 phase after multiple thermal cycles at high temperature.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Pengcheng Wang, Zhiquan Xu, Xuefeng Liu, Haohan Wang, Bin Qin, Jinghuang Lin, Jian Cao, Junlei Qi, Jicai Feng
Summary: This study proposes a novel strategy of incorporating a carbon barrier layer between the active filler and Sc2W3O12 materials, which effectively promotes the negative thermal expansion behavior of Sc2W3O12 and enhances the shear strength of brazed joints. The results provide insights for expanding the application of NTE materials in brazing processes and contribute to the development of low-CTE composites.
Article
Materials Science, Ceramics
Chang Zhou, Chenxi Liu, Yongxiao Zhou, Hongbing Zhang, Hongsheng Sun, Chunyu Yu, Peiyu Song, Qiang Zhang, Gaohui Wu
Summary: Zero thermal expansion (ZTE) materials with excellent dimensional stability under temperature fluctuations are important for high-precision devices. This study has developed a lightweight ZrW2O8/Al-Si composite that shows both ZTE and high thermal conductivity, opening up a new frontier for high-performance ZTE materials.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Pengcheng Wang, Xuefeng Liu, Haohan Wang, Jian Cao, Junlei Qi, Jicai Feng
Summary: A novel composite brazing alloy was developed by introducing Y2Mo3O12 particles with negative thermal expansion into AgCuTi alloy to alleviate the residual stress of C-f/SiC-GH3536 joint. The strong negative thermal expansion behavior of Y2Mo3O12 material greatly reduced the thermal expansion coefficients of the composite filler, leading to the reduction of residual stress and the enhanced bonding strength of the joint.
MATERIALS CHARACTERIZATION
(2022)
Article
Polymer Science
Zhibin He, Xi Ren, Zhenzhong Wang, Zhen Pan, Yuexin Qi, Shujun Han, Haifeng Yu, Jingang Liu
Summary: A polyimide-silica nanocomposite film with good optical transparency, thermal stability, and high-temperature dimensional stability was developed in this study.
Article
Chemistry, Physical
Andrej Opalek, Stefan Emmer, Roman Cicka, Nada Beronska, Peter Oslanec, Jaroslav Kovacik
Summary: Copper-graphite composites with varying graphite volume fractions were prepared and examined for their microstructure and coefficient of thermal expansion. The CTE decreased with increasing graphite volume fraction, and the presence of cuprous oxide was identified in pure copper composites. Modeling showed that the clustering of graphite through van der Waals bonds is a critical factor affecting the microstructure and CTE of the composites when more than 30% graphite is present.
Article
Polymer Science
Yanshuang Gao, Huasen Wang, Jie Jia, Zhen Pan, Xi Ren, Xinxin Zhi, Yan Zhang, Xuanzhe Du, Xiaolei Wang, Jingang Liu
Summary: Negative photosensitive polyimides (PSPIs) have gained increasing attention in semiconductor fabrication, optical fiber communications, and other advanced optoelectronic areas. In this study, modified PSPIs with enhanced optical transparency and reduced thermal expansion were developed, leading to PSPI materials with photo-patterned ability.
Article
Engineering, Environmental
Qiangsheng Sun, Yudi Feng, Jia Guo, Changchun Wang
Summary: Researchers have designed and synthesized a new conformation-switchable curing agent that can control the coefficient of thermal expansion (CTE) of epoxy resins from negative to positive. The agent has been proven effective through theoretical calculations and experimental results, and commercial epoxy resins cured with it exhibit low CTE and improved mechanical properties.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Composites
Yuan Chen, Lin Ye, Anthony J. Kinloch, Y. X. Zhang
Summary: This study demonstrates the use of 3D printing via fused filament fabrication (FFF) to manufacture a dual-composite, planar-lattice base-platform structure for high precision optical or mechanical devices. The results show that using carbon-fiber reinforced polyamide materials with FFF technology can achieve a very good dimensional stability.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Ying-Chi Cheng, Yu-Che Chen, Yan-Cheng Lin, Chi-Ching Kuo, Wen-Chang Chen
Summary: Polyimides have excellent thermal-mechanical stability and can be widely used in the electronic industry. However, their dielectric properties are not ideal. In this research, a cross-linking strategy was used to improve the dielectric properties of polyimides, specifically poly(ester imide)s (PEIs). The cross-linked PEIs showed reduced dielectric constant (Dk) and maintained low dissipation factor (Df) at a high frequency range of 10-40 GHz. This study provides an effective approach to control the dielectric properties of polyimides through manipulating the structure rigidity and free volume by using cross-linking.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
P. Wang, X. Liu, H. Wang, J. Cao, J. Qi, J. Feng
Summary: A composite filler metal of Ag-Cu-Ti + Sc-2(WO4)(3) was developed to join Cf/SiC and GH3536, effectively releasing residual stress and improving the shear strength of the joints. The results provide a promising strategy for introducing new Sc-2(WO4)(3) reinforcing phase in the Ag-Cu-Ti system and improving the reliability and feasibility of composite brazing alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Alexandre Brillon, Justo Garcia, Fanny Riallant, Christian Garnier, Anne Joulain, Yongfeng Lu, Jean-Francois Silvain
Summary: Aluminum matrix composites with boron carbide reinforcements were fabricated using solid state powder metallurgy and hot-pressing process. The incorporation of B4C particles up to 12% increased the hardness and strain hardening threshold of the composite material, but decreased ductility. The thermal conductivity and coefficient of thermal expansion also decreased with an increase in B4C volume fraction.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Composites
Yuhuan Yuan, Cong Peng, Tao Sun, Duo Chen, Chang Gao, Shichao Li, Zhanjun Wu
Summary: The study found that the content of particles has the greatest impact on the CTE of the matrix and GTC of the CFRE, with small particle size showing advantages at low particle content. However, this advantage disappears when the content increases to 30%. A high KH560 grafting rate is beneficial for reducing CTE and GTC, especially for large particles.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Seyed Mehdi Mirhadi, Amir Abbas Nourbakhsh, Najmeh Lotfian, Behnam Hosseini
CERAMICS INTERNATIONAL
(2015)
Article
Materials Science, Ceramics
S. M. Mirhadi, A. Forghani, F. Tavangarian
CERAMICS INTERNATIONAL
(2016)
Article
Materials Science, Multidisciplinary
Seyed Mehdi Mirhadi, Nahid Hassanzadeh Nemati, Fariborz Tavangarian, Morteza Daliri Joupari
MATERIALS CHARACTERIZATION
(2018)
Article
Chemistry, Physical
S. M. Mirhadi
JOURNAL OF ALLOYS AND COMPOUNDS
(2014)
Article
Materials Science, Biomaterials
S. M. Mirhadi, F. Tavangarian, R. Emadi
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2012)
Article
Nanoscience & Nanotechnology
Shima Mahtabian, Zahra Yahay, Seyed Mehdi Mirhadi, Fariborz Tavangarian
JOURNAL OF NANOMATERIALS
(2020)
Article
Materials Science, Ceramics
Shima Mahtabian, Seyed Mehdi Mirhadi, Fariborz Tavangarian
Summary: Rose petals were used to fabricate osteon-like scaffolds with lamellar structure for bone tissue engineering applications. The scaffolds showed good bioactivity and biocompatibility, with pore diameters ranging from 13-20 μm. Red rose petals were found to be a suitable template for designing scaffolds in bone tissue engineering.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
N. Hassanzadeh Nemati, S. M. Mirhadi
INTERNATIONAL JOURNAL OF ENGINEERING
(2020)
Article
Emergency Medicine
Behnam Hosseini, Seyed Mehdi Mirhadi, Mehdi Mehrazin, Mohsen Yazdanian, Mahmood Reza Kalantar Motamedi
Article
Materials Science, Ceramics
Seyed Mehdi Mirhadi, Hamed Ghomi, Rahmatollah Emadi
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)