Article
Engineering, Manufacturing
Jiang Li, Bowen Hu, Kun Hui, Kang Li, Li Wang
Summary: Fillers, including CNTs, SiC nanowires, boron phenolic resin, and methyl-POSS, have significant influences on the characteristics of porous structure in char layers of EPDM composites. Different fillers exhibit various densification mechanisms, such as CVD-promotion densification for CNTs and SiC nanowires, char residue densification for boron phenolic resin, and a combination of mechanisms for methyl-POSS, resulting in the best ablation performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Ceramics
Alessandro Filipponi, Giulia Masi, Maria Chiara Bignozzi
Summary: This study aims to investigate the influence of parameters such as Na/Al molar ratio, water content, and pressure load on the physical, microstructural, and durability properties of one-part pressed geopolymers. The results show that these parameters play a key role in controlling the properties of geopolymers and optimizing them can lead to geopolymers suitable for microfiltration flat membrane support. The best performances in terms of durability are obtained when using the highest pressure load (20 MPa) and water content (15%).
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
B. D. S. Deeraj, Gejo George, N. R. Dhineshbabu, Suryasarathi Bose, Kuruvilla Joseph
Summary: This study focused on the preparation and characterization of zirconia incorporated PAN-based carbon nanofiber reinforced epoxy composites as effective EMI shielding materials. The results showed superior storage modulus and excellent EMI shielding effectiveness, especially stacking the ZrO2@CNF mats to achieve outstanding shielding effectiveness above -90 dB in the Ku band, which is significant for industrial, radar, and military applications.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Ceramics
Sarabjit Singh, Vajinder Singh, Sweety Kumari, A. Udayakumar, V. V. Bhanu Prasad
Summary: The study found that the flexural strength of SiC seal-coated C-f/SiC composites, whether with a single-layer pyrocarbon (PyC) interphase or multilayered (PyC/SiC)(n=4) interphase, was significantly higher than that of un-coated samples.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
M. A. Mazo, A. C. Caballero, J. Rubio
Summary: In this study, cheap, abundant, and easily-obtained carbon fillers such as graphite and carbon black were successfully incorporated into a silicon oxycarbide matrix to obtain dense crack-free bulk composites with enhanced electrical and thermal conductivities. Raman parameters were crucial for understanding the electronic and/or phonon transport in the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Hang Liu, Hongguang Wang, Qian Song, Kathrin Kuester, Ulrich Starke, Peter A. Aken, Elias Klemm
Summary: A freestanding metal-organic layer with a 2D kagome dual lattice was successfully constructed, allowing uniform growth of Bi2O3 nanowires and exhibiting excellent CO2 electroreduction activity with high Faradaic efficiencies across a wide potential range. This post-synthetic modification strategy highlights the superiority of optimizing MOL-based composites for electrocatalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Ceramics
Agustin Avalos, Eugenia Zelaya, Marcelo R. Esquivel
Summary: This study presents a versatile platform for the production of metal-oxide composites, demonstrating the synthesis of a La0.25Ce0.52Nd0.17Pr0.06O2 - 3Ni composite through a two-step method. The tunable microstructure of the composite allows for various technological applications.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Composites
Sourav Kumar Mahapatra, Alok Satapathy
Summary: This investigation develops and characterizes a type of multi-phase hybrid composites made of bi-directional ramie fibers, epoxy resin, and micro-sized titania particles in different proportions. The composites are fabricated using the hand layup technique and subjected to physical, compositional, and mechanical characterization tests. The results show that the inclusion of titania particles improves the mechanical properties and hardness of the composites, making them potentially useful as functional materials in wear-prone situations.
POLYMER COMPOSITES
(2023)
Article
Nanoscience & Nanotechnology
A. I. Ustinov, T. V. Melnychenko, S. A. Demchenkov
Summary: Al/Si multilayer foils were produced by vacuum deposition at 150℃, showing alternation of aluminium and amorphous silicon layers. Heating the foils in the temperature range of 180-230℃ led to increased plastic deformation rate, possibly due to aluminium-induced silicon crystallization. As the temperature reached 450-500℃, the rate of plastic deformation rose abruptly, suggesting intergranular slipping of aluminium grains facilitated by pores.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Ceramics
Xuye Wang, Guopu Shi, Qinggang Li, Junyan Wu, Hao Wu, Liu Zhang, Zhi Wang
Summary: In this study, Ti3SiC2/Al2O3 composites were prepared using Ge as a sintering aid, which improved the purity and mechanical properties of the composites. The optimal amount of Ge was found to be 0.3 mol, resulting in composites with high flexural strength, fracture toughness, and microhardness. The formation of Ti-3(Si1-xGex)C-2 was confirmed through various analyses, and a model crystal structure was established with the calculated solid solubility of Ge.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Laura Silvestroni, Simone Failla, Nicola Gilli, Cesare Melandri, Umut Savac, Servet Turan, Diletta Sciti
Summary: This study investigates the microstructural features of B4C-TiB2 composites and their evolution from powder processing to sintering. Nanoindentation was used to correlate small-scale grain structures to local properties, providing insights into mechanical behavior. The development of a core/shell structure with different compositions and variable guest cations in the boride grains was observed in dense ceramics, revealing new findings for the synthesis of high-performance materials.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Maxim Ozerov, Vitaly Sokolovsky, Sergey Nadezhdin, Ekaterina Zubareva, Nadezhda Zherebtsova, Nikita Stepanov, Lujun Huang, Sergey Zherebtsov
Summary: The TiZrNb metal-matrix composites reinforced by in-situ formed borides were produced using different amounts of TiB2. The composites exhibited varying microstructures and mechanical properties with the increase in boride content. Load transfer strengthening was found to be the main contributor to the overall strength of the composite. The biocompatibility evaluation suggested a decrease in the proliferation rate of mesenchymal stem cells with an increase in boride content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Ahmed Sameer Khan Mohammed, Richard Rateick, Huseyin Sehitoglu
Summary: The mechanical properties of Carbon-Carbon (C/C) composites are greatly influenced by the strength of the fiber-matrix interface. However, little attention has been given to the pre-fracture behavior that determines this interface strength. This study investigates the structural changes caused by inelastic energy dissipation prior to fracture in C/C composites using flat-punch Nanoindentation coupled with Transmission Electron Microscopy (TEM). The results demonstrate that the dissipated energy causes graphitization of the composite and leads to a weakening of the interface, which is indicated by a reduction in basal interplanar spacing and relative Orientation Angle between crystallites within the fiber and matrix regions. A hypothesis is proposed that suggests a higher initial OA-mismatch results in a higher interface strength due to more energy dissipation. This study establishes the importance of pre-fracture microstructural evolution mechanisms in dictating interface strength and presents a novel hypothesis for the design of C/C mechanical properties.
Article
Construction & Building Technology
Zymantas Rudzionis, Simona Tuckute, Suman Kumar Adhikary
Summary: This study aims to prepare thermal insulating lightweight self-compacting cement composites (LWSCCC) with a density below 1400 kg/m3 using lightweight minerals and aggregates. The inclusion of porous-structured expanded glass aggregate (EGA) increases water demand and the risk of higher water absorption capacity. Partial replacement of EGA with aerogel increases porosity but decreases compressive strength and increases water absorption. However, using aerogel in combination with EGA can achieve a density below 1000 kg/m(3) while maintaining self-compaction ability and adequate strength.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Justyna Zygmuntowicz, Joanna Los, Bernard Kurowski, Paulina Piotrkiewicz, Waldemar Kaszuwara
Summary: The study focused on the fabrication and characterization of Al2O3-Cu and Al2O3-Cu-Mo ceramic-metal composites, with molybdenum addition improving the wear resistance properties of the composites.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
