Article
Materials Science, Multidisciplinary
Ipek Akin, Burak Cagri Ocak, Melis Kaplan Akarsu, Onuralp Yucel, Filiz Sahin, Gultekin Goller
Summary: The study investigated the effect of GNP concentration on the mechanical properties of spark plasma sintered TiB2 and NbB2 ceramics, finding that GNPs enhance densification while also affecting microhardness. NbB2-GNP composites exhibited higher fracture toughness and better oxidation resistance compared to TiB2-GNP composites.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Mechanics
Zhang Xiaoyong, Cai Shihan, Wang Zhouhua, Qiao Huiyun, Lin Guixing, Wu Xiaolei, Chen Yu
Summary: This research investigates the mechanical properties of ultra-high performance fiber reinforced cement-based composite (UHPFRC) after exposure to elevated temperatures. The result shows that the compressive strength and axial compressive strength of UHPFRC are improved after exposure to high temperatures, while the effect on flexural strength is not significant. The addition of steel fibers greatly improves the cube compressive strength, axial compressive strength, and flexural strength of UHPFRC.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Leszek Szalewski, Magdalena Szalewska, Pawel Jarosz, Michal Wos, Jolanta Szymanska
Summary: The study assessed the temperature rise values and flexural strength of composite materials with different polymerization modes and times, showing varying temperature and strength results. It is recommended to use a polymerization mode that protects the dental pulp from thermal injury in cases of deep caries.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Ceramics
D. Demirskyi, T. Nishimura, T. S. Suzuki, K. Yoshimi, O. Vasylkiv
Summary: During spark plasma sintering, SiB6 decomposes into cubic silicon carbide and boron carbide. The HfB2-SiB6 composite material has better hardness, toughness, and strength compared to HfB2-SiC ceramics. The strength decreases with increasing temperature under high-temperature conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Artur Czuprynski, Marcin Zuk
Summary: This study used powder plasma-transferred arc welding to produce metal matrix composite layers, and evaluated their resistance to cracking under dynamic loading through Charpy hammer impact tests. The interactions between ceramic particles and the metal matrix significantly influenced the formation and properties of the composite layers. Adjusting the particle size and composite density can enhance fracture toughness.
Article
Construction & Building Technology
Liang Liu, Gui Yang, Jianxin He, Hanlong Liu, Jingwei Gong, Haihua Yang, Wu Yang, Panuwat Joyklad
Summary: Blended fibres are used in ordinary Portland cement-based materials to improve their performance under fire. The addition of calcite powder increased mechanical strength of the materials, but higher temperatures led to significant reductions in strength. Empirical models were established to predict strength properties, with fibre factor and temperature as major affecting variables, showing superior outcomes.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Pouya Rafiei, Hoofar Shokravi, Seyed Esmaeil Mohammadyan-Yasouj, Seyed Saeid Rahimian Koloor, Michal Petru
Summary: The study found that adding basalt fiber can effectively improve the tensile and flexural strength of reinforced ECC, but may slightly decrease compressive strength. The mechanical properties of the material may undergo significant changes in high-temperature environments.
APPLIED SCIENCES-BASEL
(2021)
Article
Construction & Building Technology
Jiyu Tang, Wei Ma, Zhiqiang Gu, Yafang Zhang, Dong Fang, Liangping Zhao
Summary: This paper studied the mechanical properties of aluminate cement-based materials partially replaced by recycled brick powder after exposure to high temperatures. A total of 72 prism specimens were prepared with varying levels of brick powder replacement and exposure temperatures. The effects of brick powder on the mechanical properties of the materials before and after high temperatures were revealed. The results showed that a 5% replacement ratio presented the highest compressive and flexural strength, and the compressive strength reached its peak after exposure to 200°C, while the flexural strength decreased with increasing exposure temperature. Explosive spalling could be inhibited with a brick powder replacement ratio exceeding 10%. A calculation method considering the effect of replacement ratio to predict the strength of the material after exposure to high temperatures was proposed and validated.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ozge Varlik, Yapincak Goncu, A. Y. Nuran
Summary: Titanium diboride-chitosan composite coatings were successfully produced by electrophoretic deposition techniques. The effect of process parameters on the coatings was investigated and the suspension properties and deposition mechanism were discussed. The results showed that the coatings had a uniform and crack-free morphology, and the chitosan content significantly affected the adhesion behavior.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
W. S. Rubink, V Ageh, H. Lide, N. A. Ley, M. L. Young, D. T. Casem, E. J. Faierson, T. W. Scharf
Summary: Spark plasma sintering (SPS) was used to consolidate B4C and B4C-TiB2 powder specimens, achieving high theoretical density and excellent mechanical properties. The addition of TiB2 demonstrated toughening and strengthening effects in the ceramic composites, showing promise for body armor applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Construction & Building Technology
Vito Francioso, Carlos Moro, Alberto Castillo, Mirian Velay-Lizancos
Summary: The research found that recycled PP fibers had a minor impact on flexural strength under normal conditions, but helped improve the strength and toughness of the composite after exposure to high temperature, enhancing its behavior under flexural stresses.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Ceramics
Tingbo Wang, Si 'an Chen, Zikai Zhao, Qingsong Ma, Weiguo Mao
Summary: SiC/SiBCN composites were prepared using the PIP technique, and the evolution of their structural composition and properties under high-temperature environment was investigated to understand the failure mechanism. It was found that below 1500℃, the degradation of SiC fiber was the main factor for the decrease in flexural strength, while above 1600℃, both the mechanical properties of SiC fiber and the structure of SiBCN ceramic matrix contributed to the deterioration of the composite.
CERAMICS INTERNATIONAL
(2023)
Article
Computer Science, Interdisciplinary Applications
Agus Maryoto, Han Ay Lie, Hendrik Marius Jonkers
Summary: This paper investigates the flexural strength of a concrete-galvalume composite beam at elevated temperatures using numerical and experimental methods. The study reveals that the flexural strength decreases with higher temperature, and cracking moments are sensitive to temperature fluctuations.
COMPUTERS AND CONCRETE
(2021)
Article
Materials Science, Ceramics
Yi Zhou, Hao Zheng, Shanshan Zhao, Chengxia Zhang, Wei Bai, Chaoli Sun, Yang Tong, Junyu Yang
Summary: Phosphate glasses composed of P2O5-Nb2O5-BaO-Na2O-CeO2 were synthesized successfully, and it was found that the addition of 1 mol% ceria resulted in the densest structure with the highest hardness values. This system of phosphate glass with 1 mol% ceria shows promise for the development of various optical, electrical, and mechanical devices.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Thermodynamics
Morteza Savaripour, Younes Komachi
Summary: The degradation of cement products at high temperature was studied with different amounts of zirconium diboride nanoparticles (0, 0.5, 1, 3, and 5 mass%) with the nano-filling effect. The incorporation of ZrB2 nanoparticles in the cement matrix significantly improved the thermal protection of the composite at high temperature, with a mass loss of 6% after 30 min at 1000 celcius. ZrB2 converted to ZrO2 and B2O3 to protect the surface from oxygen penetration by cutting off the channels.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Materials Science, Ceramics
Dmytro Demirskyi, Hanna Borodianska, Toshiyuki Nishimura, Tohru S. Suzuki, Kyosuke Yoshimi, Oleg Vasylkiv
Summary: In this study, the consolidation, solid-solution formation, and high-temperature properties of tantalum hafnium carbide with a 1 TaC:4 HfC ratio were investigated. It was found that Ta0.2Hf0.8C maintained high toughness and strength at 2000 degrees C. By analyzing shrinkage rate and strain-stress data, activation energies for densification and flexure were estimated.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Dmytro Demirskyi, Tohru S. Suzuki, Kyosuke Yoshimi, Oleg O. Vasylkiv
Summary: This study investigated the densification, microstructure evolution, and high-temperature properties of bulk lanthanum hexaboride (LaB6). Spark-plasma sintering was used to consolidate LaB6, and it was observed that the toughness and strength decreased at high temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
D. Demirskyi, T. Nishimura, T. S. Suzuki, K. Yoshimi, O. Vasylkiv
Summary: During spark plasma sintering, SiB6 decomposes into cubic silicon carbide and boron carbide. The HfB2-SiB6 composite material has better hardness, toughness, and strength compared to HfB2-SiC ceramics. The strength decreases with increasing temperature under high-temperature conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
D. Demirskyi, H. Sepehri-Amin, T. S. Suzuki, K. Yoshimi, O. Vasylkiv
Summary: The temperature dependence of flexural strength in sintered boron carbide was investigated. At temperatures above 2000 degrees C, B4C displayed remarkably high flexural strength and a transition from brittle fracture to plastic deformation. Scanning transmission electron microscopy analysis revealed that the observed plasticity in B4C at high temperatures originated from microstructural amorphization.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
D. Demirskyi, P. Badica, A. Kuncser, O. Vasylkiv
Summary: We investigated the mechanical behavior of a bulk boron ceramic prepared by spark plasma sintering of commercially available beta-boron powder. With the addition of a protective tantalum foil, we successfully fabricated polycrystalline boron ceramic and demonstrated its high-temperature flexural strength, toughness, and Young's moduli. The ceramic exhibited promising flexural strength and fracture toughness at room temperature, and yielded an impressive yield strength at elevated temperatures.
Article
Materials Science, Ceramics
Dmytro Demirskyi, T. Nishimura, T. S. Suzuki, K. Yoshimi, Oleg Vasylkiv
Summary: In this study, the consolidation, solid-solution formation, and high-temperature properties of carbides in the Ta-Nb-C system were investigated. It was found that the tantalum niobium carbide exhibited better consolidation performance and smaller grain size at high temperatures. In addition, the strength of the material decreased linearly with the increase of NbC content.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Dmytro Demirskyi, Kyosuke Yoshimi, Tohru S. Suzuki, Oleg O. Vasylkiv
Summary: (Ta,W)C ceramic bulks were prepared by spark plasma sintering. The densification kinetics and solid-solution formation kinetics of the powder mixtures using TaC and W powders were studied. It was found that sintering at 2000 degrees C limits the reaction volume and allows forming a complete solid-solution using finer powders. The flexural strength of the (Ta,W)C ceramic bulks was investigated as a function of the TaC content, and the maximum strength was found for the 60 mol.% TaC composition. Strength increased up to 1200 degrees C and then gradually decreased to 2000 degrees C. When TaC was reinformed by coarse W spheres, the flexural strength decreased from 570 MPa at room temperature to 220 MPa at 2000 degrees C.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Editorial Material
Nanoscience & Nanotechnology
D. Demirskyi, K. Yoshimi, T. S. Suzuki, O. Vasylkiv
SCRIPTA MATERIALIA
(2023)
Editorial Material
Nanoscience & Nanotechnology
D. Demirskyi, T. Nishimura, K. Yoshimi, O. Vasylkiv
SCRIPTA MATERIALIA
(2023)
Article
Multidisciplinary Sciences
A. Kuncser, O. Vasylkiv, H. Borodianska, D. Demirskyi, P. Badica
Summary: In this study, a high-density (99.5%) ceramic composite composed of titanium boride and boron carbide was fabricated by spark plasma sintering. The material exhibited high bending strength of approximately 1.1 GPa when tested at 1800 degrees C in an Ar atmosphere. The peculiar strength-strain curve indicated the presence of three regions with varying contributions of elastic and plastic deformations. Transmission electron microscopy observations revealed a rearrangement mechanism in the boron carbide crystals, where stacking faults and twins transformed into nano-twins, leading to both plastic deformation and strengthening.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Ceramics
Oleg Vasylkiv, Dmytro Demirskyi
Summary: This study investigated the high-temperature strength of spark plasma sintered tantalum diboride (TaB2) for the first time. TaB2 exhibited unique elastic fracture behavior below 1900°C, unlike other transition metal diborides. The consolidation process involved spark plasma sintering at 2000-2200°C, yielding dense TaB2 samples. The flexural strength was measured at elevated temperatures up to 2000°C, showing a quite high flexural strength of 400±20 MPa at 1900°C. These findings provide valuable insights into the high-temperature behavior of TaB2, highlighting its potential for advanced applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Serhii Nakonechnyi, Tetiana Soloviova, Alexandra Yurkova, Ievgen Solodkiy, Petro Loboda
Summary: In this study, a mechanically alloyed AlNiCoFeCr high entropy alloy (HEA) was used to develop metal matrix composite (MMC) coatings. The coatings, consisting of AlNiCoFeCr and 30 wt % TiB2, were fabricated using the solid-state cold spraying (CS) technique under low pressure and temperature conditions. The effects of compressed air flow temperature and pressure on the structure and mechanical properties of the coatings were investigated. The CS process retained the phase composition and nanostructure in the coatings, and increasing the pressure led to a refinement in the coating structure and an increase in the fraction of TiB2 particles. Increasing the temperature to at least 300 degrees C improved the deposition efficiency and properties of the coatings. The coatings fabricated at a spraying temperature of 450 degrees C and a compressed air flow pressure of 0.9 MPa exhibited a good combination of high microhardness and sufficient indentation fracture toughness.
Article
Materials Science, Ceramics
Zilong Xiong, Wenzhuo Xue, Mujun Li, Feihu Tan, Yupeng Chen, Hongyu Yu
Summary: In this study, CBS glass/Al2O3 composites were developed for LTCC applications based on a CaO-B2O3-SiO2 (CBS) glass system with a high boron content. The study revealed that the softening of glass and interfacial reaction between the glass and Al2O3 were the two most important factors affecting LTCC's densification process. Real-time shrinkage rate of LTCC during sintering was successfully simulated, and it was proven that the formation of the CaAl2(BO3)O phase played a significant role in reducing glass viscosity and promoting dense structure formation. The resulting LTCC composite exhibited excellent performance for high-frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Saurabh Kumar Sharma, Vinita Grover, Rakesh Shukla, Abid Hussain, Ambuj Mishra, Pawan Kumar Kulriya
Summary: In this study, the disordering caused by swift heavy ion irradiation in two different compositions of pyrochlore structures was investigated. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy were used to analyze the samples before and after irradiation. It was found that both compositions underwent amorphization due to irradiation, with a slower rate observed in Nd1.8Zr2.2O7.1. The irradiation-induced modified track region in Nd1.8Zr2.2O7.1 consisted of defect-rich pyrochlore structure, anion-deficient fluorite structure, and amorphous domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiabei He, Mengshan Song, Ming Yang, Miaomiao Zhu
Summary: This study investigates the influence of ion irradiation on high-entropy ceramics and finds that irradiation-induced lattice rearrangement can improve the radiation resistance of these ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jian Li, Jia Liu, Yongcui Zhang, Wei Sun, Yang Wang, Haitao Wu, Ling Li, Chuanbing Cheng, Yingying Wang, Ke Tan, Futian Liu
Summary: Microstructure design plays a crucial role in regulating the microwave dielectric properties of materials, however, the understanding of frequency temperature stability and related micromechanism remains limited. In this study, a combination of first-principles calculations and experimental observation was used to investigate the correlation among sintering behavior, crystal structure, bonding nature, and microwave dielectric properties of LnPO(4) (Ln = Eu, Pr) ceramics. The research findings systematically clarify the optimized effect and micromechanism of lanthanides on the dielectric properties of monazite ceramics, providing insights into the design and enhancement of microwave dielectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li
Summary: The study investigates the frictional and wear behaviors of carbon fiber-reinforced SiC ceramic matrix composites with different fiber orientations mating with ceramic balls. The results show that fiber orientation significantly affects the friction and wear properties of the composites. Pads with randomly arranged fibers demonstrate better friction stability and lower wear volume, potentially suitable for bearing material applications. The research also explores the factors influencing the formation of continuous tribo-film and identifies abrasive wear and oxidation wear as the dominant wear mechanisms for the friction pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sergey Nikolaevich Perevislov, Ilya Evgenievich Arlashkin, Valentina Leonidovna Stolyarova
Summary: This paper describes the synthesis and sintering of MAX phases in the Zr-Al-C system. Different mixtures of initial Zr/Al/C and Zr/Al/ZrC powders were used to synthesize Zr2AlC and Zr3AlC2 MAX phases. The highest content of Zr3AlC2 MAX phase was obtained using a component ratio of 1:1.5:2-51.1 vol.% of Zr/Al/ZrC powders.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Weijia Luo, Xubin Wang, Baiheng Bai, Jianli Qiao, Xingcong Chen, Yongzheng Wen, Jingbo Sun, Lingxia Li, Ji Zhou
Summary: This study successfully establishes the relationship between internal strain and dielectric loss by synthesizing and designing specific structure of tungsten bronze ceramics, and concludes that controlling internal strain can effectively reduce dielectric loss. This research is of great significance for the development of future all-ceramic non-Hermitian devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
JiaNan Wang, ZhiQiang Li, YongZheng Zhu, Yao Liang, Yan Cui, HuaLong Tao, Bo Song, Alexander Nikiforov, ZhiHua Zhang
Summary: First-principles calculations were performed to investigate the crystal structure, electronic structure, and ion diffusion of sulfur-doped Li2FeSiO4. The results showed that sulfur doping can improve the electronic conductivity and reduce the energy barrier for ion diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Xiaodi Dai, Serdar Aydin, Mert Yuecel Yardimci, Gunter Reekmans, Peter Adriaensens, Geert De Schutter
Summary: This study investigates the rheological behavior, solidification process, and nanostructure changes of sodium hydroxide-activated slag (NH-AAS) and sodium silicate-activated slag (SS-AAS) pastes over time. The results show that NH-AAS and SS-AAS release similar heat and reach a similar reaction degree at their initial setting times, but have different gel structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yanliang Ji, Simon Becker, Zichen Lu, Alexander Mezhov, Regine von Klitzing, Schmidt Wolfram, Dietmar Stephan
Summary: This study reveals the significant influence of resting time on the rheological properties of cement suspensions, which is closely related to non-absorbed polycarboxylate superplasticizers (PCEs) size variation. Adsorbed PCE during resting tends to bridge particles instead of dispersing them, leading to an increased yield stress.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zun Xia, Yedong Rong, Hao Li, Ye Dong, Hongbo Yu, Jie Xu, Xiuhui Wang, Jinlong Yang
Summary: This study presents the synthesis of hollow MgAl2O4 particles in situ within porous ceramics, resulting in volume expansion and the formation of a hierarchical pore structure, leading to a significant improvement in compressive strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Honglong Wang, Zhiguo Sun, Faming Xia, Chenguang Yang, Xiaoguang Wang, Jintang Li, Linxu Jiang
Summary: In this study, the micro-geometry morphology variation and microstructural transformation mechanism of muscovite crystals under electron beam irradiation were explored. The results revealed the instability of the muscovite lattice under irradiation, as well as the expansion and shrinkage of the lattice with increasing dose. The study also identified changes in chemical structure and other mechanisms involved. These findings are significant for the design of radiation-resistant silicate materials and the manufacturing of electronic components used in the aerospace industry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
