Article
Materials Science, Composites
Heng Cai, Junjie Ye, Jiale Xi, Yun Hong, Yang Shi, Yongkun Wang, Wangpei He
Summary: In this study, an improved microscale method based on the parametric modeling scheme of the finite volume method is used to evaluate the effective thermal conductivity and localized thermal fields of fiber-reinforced composites. The proposed method demonstrates high accuracy in solving their effective properties, as evidenced by comparisons with finite element method and experimental data. The study also investigates the mesh sensitivity and fiber volume fraction influence on thermal conductivity.
POLYMER COMPOSITES
(2022)
Article
Thermodynamics
L. Zhou, T. B. Yuan, X. S. Yang, Z. Y. Liu, Q. Z. Wang, B. L. Xiao, Z. Y. Ma
Summary: This study investigated the influence of CNT configuration, heat transfer direction, interfacial thermal resistance, and volume fraction on the effective thermal conductivity of CNT/Al composites using a 3D multiscale finite element model. The results showed that the CNT configuration played a major role in determining the thermal conductivity, with the layered configuration exhibiting the highest thermal conductivity. Additionally, the composite displayed an excellent effective thermal conductivity of 400 W/m.K when the volume fraction of CNTs was about 3.7%.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Xintong Zhao, Wei Wu, Dietmar Drummer, Yi Wang, Sufei Cui, Chao Liu, Zijian Lu, Shuo Li, Qiming Chen
Summary: Thermal conductive composites can be constructed by self-assembling 3D graphene aerogels, but defects and edges in the aerogels limit their thermal conductivity. This study developed a facile method to synthesize SiC nanowires on the edges of graphene sheets, which reduced phonon scattering and enhanced thermal conduction efficiency. The results showed that the modified aerogels achieved high thermal conductivity at low filler loading.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Thermodynamics
Aatef D. Hobiny, Ibrahim Abbas
Summary: This paper focuses on the effect of variable thermal conductivity under generalized photothermoelastic theory in semiconductor medium. The numerical solutions of the problem are obtained using the finite element method, considering the impact of uniform unit step temperature on the medium's surface. A comparison is made between the numerical results and previous analytical studies, neglecting the new parameter, to confirm the accuracy of the proposed method.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Manufacturing
Xiaoyuan Duan, Shuaishuai Cheng, Zhiwei Li, Chaobo Liang, Zhiyi Zhang, Guizhe Zhao, Yaqing Liu, Dong An, Zhijian Sun, Chingping Wong
Summary: By utilizing a water treatment method and ice template process, a 3D graphene aerogel modified with L-cysteine was prepared to enhance the thermal conductivity of natural rubber composites, showing promising mechanical properties and antistatic properties.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Thermodynamics
Dongliang Ding, Qiuyu Zhang, Guangzhao Qin, Yanhui Chen
Summary: Thermal conductivity of polymer composites with oriented anisotropic fillers is accurately predicted using a super-cell model with off-set fillers based on a hexagonal prism primitive-cell. The model systematically evaluates the impact of various factors on the anisotropic thermal conductivity of polymer composites and shows excellent agreement with experimental results. This work provides a practical means to predict thermal conductivity and has guiding significance for designing thermal management materials.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Multidisciplinary
Tiantian Yang, Zeyi Jiang, Heming Han, Xinzhi Cai, Yuqiao Liu, Xinru Zhang, Xinxin Zhang, Yujie Ren, Jian Hu
Summary: In this study, high thermal conductive PVDF composites were fabricated using graphene foam and dopamine modified graphene nanoplatelets. The results showed that welding mGNPs onto GF improved the composite's TC by forming efficient thermal conductive pathways. The obtained composites exhibited excellent in-plane TC, dimensional stability, and mechanical property.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Composites
Yingchun Liu, Maoping Lu, Kun Wu, Enxiang Jiao, Liyan Liang, Jun Shi, Mangeng Lu
Summary: By preparing high thermally conductive PDMS composites containing undamaged covalent-functionalized graphene nanoflakes, the contact resistance between interfaces was effectively reduced, resulting in an enhanced thermal conductivity and preserved superior mechanical properties. Furthermore, exploring a new synergistic mechanism further improved the heat dissipation performance of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Sriharsha Sudhindra, Farnia Rashvand, Dylan Wright, Zahra Barani, Aleksey D. Drozdov, Saba Baraghani, Claudia Backes, Fariborz Kargar, Alexander A. Balandin
Summary: The study revealed that increasing the size of graphene fillers enhances the thermal conductivity of composites, with fillers of 1200 nm lateral dimensions exhibiting lower thermal contact resistance. The effects of filler loading fraction and size on thermal conductivity were rationalized using the Kanari model. These findings are crucial for optimizing graphene fillers in thermal interface materials for efficient heat removal in high-power-density electronics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Thermodynamics
Neeraj Kumar Sharma
Summary: This paper proposes a finite element simulation approach for studying steady-state heat transfer in composites. By analyzing representative volume elements generation, meshing approaches, and boundary conditions, it is found that random orientation and interpenetration of particles can lead to higher effective thermal conductivity in composites.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Pei-Liang Bian, Hai Qing
Summary: A new phase-field based method is proposed to represent graphene reinforced composites and investigate their mechanical properties. The model is validated through comparison with a shell based finite element model, and it provides a simple way to model thin flakes reinforced composites in FEM software.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Composites
Ruoyu Huang, Dongliang Ding, Xiaoxiao Guo, Changjiang Liu, Xinhua Li, Gaoxiao Jiang, Yufeng Zhang, Yanhui Chen, Weiwei Cai, Xue-ao Zhang
Summary: Vinyl polydimethylsiloxane (PDMS) composites with spatially aligned carbon fibers (CFs) bridged by Al2O3 particles were fabricated and showed enhanced thermal conductivity. The effects of shape factor, spatial angle, and CF loading on thermal conductivity were quantitatively discussed. It was found that increased CF loading contributed positively to thermal conductivity, while shape factor and spatial angle had a negative effect.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Yifan Wang, Zongbei He, Jijun Yang, Xiaoqiu Ye, Chong Yu, Shaoyu Qiu, Lifu Yao, Qiang Zeng, Daikun Jia, Zizhen Wang, Bingqing Li, Xiaoqiang Pan
Summary: A new type of nuclear fuel, composed of graphene nanosheets and uranium dioxide, was proposed and fabricated using hot pressing sintering. The results show that hot pressing sintering is an effective method to retain graphene in the composite pellets and improve the fuel performance.
CERAMICS INTERNATIONAL
(2022)
Article
Mechanics
Tao Meng, Chaoqun Peng, Richu Wang, Yan Feng, Xiaofeng Wang, Zhiyong Cai
Summary: A new prediction model was developed to calculate the effective thermal conductivity of ellipsoidal inclusion-reinforced composites by introducing new shape coefficients and interaction coefficients based on Maxwell-Eucken's model. The model was verified using experimental data and finite element simulation, and the results demonstrated high accuracy (<10%) of the prediction model. The analysis of the model revealed an increase in the effective thermal conductivity of composites with an increase in the aspect ratio of ellipsoidal particles when randomly distributed in the matrix. However, when the ellipsoidal particles were non-randomly distributed, the effective thermal conductivity depended on the angle between the heat flux direction and the long axis of the ellipsoid.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Kent Mardlin, Osayuki Osazuwa, Marianna Kontopoulou, Weawkamol Leelapornpisit
Summary: By incorporating graphite and graphene nanoplatelets, the thermal conductivity and mechanical properties of the composites can be enhanced, with a significant increase in toughness up to 650% when adding 30% GNPs.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Bogdan Vasyliv, Jaroslaw Milewski, Viktoriya Podhurska, Tomasz Wejrzanowski, Volodymyr Kulyk, Jakub Skibinski, Volodymyr Vira, Lukasz Szablowski, Arkadiusz Szczesniak, Olaf Dybinski
Summary: The high-temperature reduction of nickel oxide and reoxidation of metallic nickel in YSZ-NiO anode material have been studied, revealing significant changes in microstructure and strength. Despite the rigorous redox treatment in pure hydrogen, the cermet still showed potential, especially when reduced in an Ar-5 vol% H-2 gas mixture.
APPLIED NANOSCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Katarzyna Pietrzak, Andrzej Gladki, Agata Strojny-Nedza, Tomasz Wejrzanowski, Kamil Kaszyca
Summary: This paper presents an example of using image analysis techniques for studying the homogeneity of two-phase materials, specifically focusing on the effect of SiC particle volume fraction in Cu/SiC composites on homogeneity. Results indicate that well-mixed composite powders exhibit homogeneous reinforcing phase when the SiC volume fraction is around 30%.
IMAGE ANALYSIS & STEREOLOGY
(2021)
Article
Chemistry, Physical
Marta Dobrosielska, Renata Dobrucka, Dariusz Brzakalski, Michal Gloc, Janusz Rebis, Julia Glowacka, Krzysztof J. Kurzydlowski, Robert E. Przekop
Summary: The study examined the impact of sample acquisition methods and composite degassing on mechanical properties and standard deviation. Differences in properties were found between samples cast in glass molds and silicone molds due to heterogeneity and self-degassing. The type of filler and degassing method significantly influenced the mechanical properties of the composite materials, providing guidelines for testing with fillers showing extended inner structures.
Article
Materials Science, Multidisciplinary
Tomasz Moscicki, Justyna Chrzanowska-Gizynska, Rafal Psiuk, Piotr Denis, K. Mulewska, Lukasz Kurpaska, Marcin Chmielewski, Maria Wisniewska, Dariusz Garbiec
Summary: Magnetron sputtered WB2 coatings with different amounts of zirconium (8, 11, and 16 at.%) were analyzed, and it was found that the coatings had alpha-AlB2 and omega-W2B5 prototype structures. The proportion of omega-W2B5 phase increased with the increase in zirconium content. The hardness of all the coatings was around 45 GPa, while the Young's modulus slightly decreased with the increase in zirconium content. Furthermore, it was observed that the addition of zirconium improved the phase stability of the coatings.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Thermodynamics
Witold Weglewski, Pandi Pitchai, Marcin Chmielewski, P. J. Guruprasad, Michal Basista
Summary: This study investigates the thermal conductivity of copper-matrix composites reinforced with silicon carbide particles coated with different metallic layers using experimental and computational micromechanics approaches. The results highlight the importance of considering the effect of imperfect interfaces for accurately modeling the thermal conductivity of the composites.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Coatings & Films
Kamil Bochenek, Witold Weglewski, Agata Strojny-Nedza, Katarzyna Pietrzak, Tomasz Chmielewski, Marcin Chmielewski, Michal Basista
Summary: Metallic coatings are widely used on steel tubes in power generation boilers to improve performance and extend lifespan. This study compared three processing techniques for depositing NiCr-Re and NiCr-Re-Al2O3 composite coatings on a 16Mo3 steel substrate. The results showed that HVOF thermal spraying was the optimal choice, with NiCr+1%Re exhibiting the best performance.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Chemistry, Physical
Rafal Maksymilian Molak, Bartosz Moronczyk, Ewa Ura-Binczyk, Zbigniew Pakiela, Wojciech Zorawski, Krzysztof Jan Kurzydlowski, Seiji Kuroda
Summary: Aluminium (Al) and titanium (Ti) coatings were applied on AZ91E magnesium alloy using a low-pressure warm spray method with different nitrogen flow rates (NFR). The effects of NFR on coating microstructure and physical properties were systematically studied. The results showed that decreasing NFR resulted in denser and more compact coatings, but also increased powder oxidation. Al coatings exhibited lower hardness and wear resistance compared to Ti coatings, but were more suitable for corrosion protection due to their low porosity and high compactness.
Article
Chemistry, Physical
Marta Dobrosielska, Renata Dobrucka, Dariusz Brzakalski, Milosz Frydrych, Paulina Kozera, Monika Wieczorek, Marek Jalbrzykowski, Krzysztof J. Kurzydlowski, Robert E. Przekop
Summary: Fractionation of diatomaceous earth allowed for obtaining a range of particle sizes, with modification using the smallest particles resulting in improved impact strength, melt flow rate, and elasticity of the PLA composite material.
Article
Chemistry, Physical
M. J. Kruszewski, K. Cymerman, R. Zybala, M. Chmielewski, M. Kowalczyk, J. Zdunek, L. Ciupinski
Summary: In this study, Se and Te co-doped CoSb3 bulk materials were fabricated using self-propagating high-temperature synthesis and pulse-plasma sintering techniques, which resulted in high chemical homogeneity and improved thermoelectric properties. The simultaneous doping and filling of voids in the skutterudite structure led to an ultralow lattice thermal conductivity and a dimensionless figure of merit of 1.1 at 723 K. These findings highlight the potential importance of the combined self-propagating high-temperature synthesis and pulse-plasma sintering techniques in the fabrication of chemically homogeneous and efficient thermoelectric materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Polymer Science
Marta Dobrosielska, Renata Dobrucka, Paulina Kozera, Rafal Kozera, Marta Kolodziejczak, Ewa Gabriel, Julia Glowacka, Marek Jalbrzykowski, Krzysztof J. Kurzydlowski, Robert E. Przekop
Summary: Amorphous diatomite was used as a filler for polyamide 11 to produce biocomposites with improved mechanical properties. The diatomite particles were fractionated by sedimentation to obtain powders with different particle size distributions. Biocomposites with varied filler content were tested for mechanical properties and analyzed for particle size distribution, filler dispersion, and thermal parameters. The results showed that biocomposites modified with diatomaceous earth exhibited higher mechanical strength, especially with larger amounts of filler. The sedimentation process used in this study can be applied on an industrial scale for the production of biocomposites.
Article
Physics, Applied
Raghottam M. Sattigeri, Prafulla K. Jha, Piotr Spiewak, Krzysztof J. Kurzydlowski
Summary: This study demonstrates that the conducting edge states in 2D topological insulators can facilitate excellent catalytic response, opening up possibilities for high-performance and efficient catalysts.
APPLIED PHYSICS LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Piya Roychoudhury, Aleksandra Golubeva, Przemyslaw Dabek, Oleksandra Pryshchepa, Gulyaim Sagandykova, Pawel Pomastowski, Michal Gloc, Renata Dobrucka, Krzysztof Kurzydlowski, Boguslaw Buszewski, Andrzej Witkowski
Summary: In this study, Pseudostaurosira trainorii mediated biosynthesized iron-oxide nanoparticles (IONPs) were used as nanostructures to assist ionization and desorption in laser desorption/ionization mass spectrometry (LDI-MS). These biogenic IONPs showed high catalytic properties and sensitivity towards small molecules, demonstrating their potential application in future nanobiotechnology and preparation of NALDI plates.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Mariusz Tryznowski, Tomasz Golofit, Selim Gurgen, Patrycja Krecisz, Marcin Chmielewski
Summary: This study aimed to analyze the influence of thermal treatment on the viscosity of shear thickening fluids (STFs). The results showed that thermal treatment can significantly increase the maximum viscosity of STFs.
Article
Materials Science, Multidisciplinary
Mark Fedorov, Jan S. Wrobel, Witold Chrominski, Grzegorz Cieslak, Magdalena Plocinska, Krzysztof J. Kurzydlowski, Duc Nguyen-Manh
Summary: The relative phase stability of fcc and bcc Cr-Fe-Mn-Ni alloys was studied using density functional theory, cluster expansion (CE), and Monte Carlo (MC) simulations. The CE models enabled the calculation of Gibbs free energies of formation for different compositions, and the MC simulations provided insights into the stability of these alloys at different temperatures. The results obtained were in line with experimental data and helped identify the alloys that are predicted to have a single fcc phase over a wide temperature range.
Article
Materials Science, Multidisciplinary
Madhavi H. Dalsaniya, Krzysztof Jan Kurzydlowski, Dominik Kurzydlowski
Summary: Understanding the properties of molecular solids at high pressure is crucial for the development of new solid-state theories. This study applies a hybrid density functional theory approach to simulate the behavior of elemental bromine under high pressure. The results accurately reproduce experimental observations and provide insights into the metallic properties of different phases.
