Article
Multidisciplinary Sciences
Hua Xie, Mingde Qin, Min Hong, Jiancun Rao, Miao Guo, Jian Luo, Liangbing Hu
Summary: High-entropy ceramics and their composites have excellent properties, but their unique characteristics make it difficult to sinter them. This study presents a rapid liquid phase-assisted ultrahigh-temperature sintering strategy, successfully preparing a high-entropy metal diboride/boron carbide composite with high hardness.
Article
Materials Science, Ceramics
Sijia Huo, Yujin Wang, Mianyi Yao, Zhikun Zhang, Lei Chen, Hui Gu, Jiahu Ouyang, Yu Zhou
Summary: Novel TiC-based composites were synthesized with ZrB2 addition as a sintering aid, exhibiting excellent mechanical properties surpassing most TiC-based composites using ceramics as sintering aids. The addition of ZrB2 led to enhanced hardness, flexural strength, and fracture toughness of the materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Iwona Sulima, Pawel Hyjek, Marcin Podsiadlo, Sonia Boczkal
Summary: This study presents the effect of zirconium diboride (ZrB2) and titanium diboride (TiB2) on the microstructure and physical, mechanical, and tribological properties of composites based on 316 L steel. The amount of each reinforcing phase added to the base alloy was 5 wt% and 10 wt%. The composites were fabricated using the SPS process. The results demonstrate that the weight fraction of the reinforcing phase influences the physical, mechanical, and tribological properties of the sintered composites. The addition of TiB2 effectively increases the hardness and compressive strength of the composites, while introducing ZrB2 improves the wear resistance of the composites.
Article
Materials Science, Ceramics
Eric W. Neuman, William G. Fahrenholtz, Gregory E. Hilmas
Summary: ZrB2 was mixed with 0.5 wt% carbon and up to 10 vol% ZrC and densified by hot-pressing at 2000 degrees C. The resulting dense ceramics exhibited reduced ZrC content and residual carbon, smaller ZrB2 grain sizes, larger ZrC cluster sizes, increased elastic modulus, hardness, toughness, and flexure strength with increasing ZrC content. The strength-limiting flaw was identified as ZrB2 grain pullout.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
A. Utkin, V. E. Prokip, D. A. Bannykh, M. A. Golosov, N. Baklanova
Summary: This study investigates the morphology, texture, and bending strength of C-f/(ZrB2-SiC) continuous carbon fiber-reinforced ceramic composite materials prepared using a new method. The results show that optimizing the slurry composition and using different fillers can lead to low-porosity composites.
INORGANIC MATERIALS
(2022)
Article
Engineering, Manufacturing
James W. Kemp, Abel A. Diaz, Elizabeth C. Malek, Brendan P. Croom, Zlatomir D. Apostolov, Surya R. Kalidindi, Brett G. Compton, Lisa M. Rueschhoff
Summary: Ultra-high temperature ceramics (UHTCs) are of interest due to their high melting temperatures and ablation resistance, but their widespread use is limited by low fracture toughness and processing challenges. This study introduces fiber-reinforced UHTC matrix composites (UHTCMCs) produced via direct ink writing (DIW), with up to 47.5 vol% of ZrB2 and up to 10 vol% of SiCf. The research demonstrates the successful fabrication of UHTCMCs with aligned fiber reinforcement and discusses defects occurring during the DIW process.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Ceramics
Shuqi Guo, Gaku Okuma, Kimiyoshi Naito, Hideki Kakisawa
Summary: In this study, VB2-20 vol% SiC composites with and without 5 vol% WC were prepared and evaluated for their mechanical properties at temperatures ranging from room temperature to 1400 degrees C. The results show that the addition of WC significantly enhanced the high-temperature strength of the composites.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Eric W. Neuman, Matthew Thompson, William G. Fahrenholtz, Gregory E. Hilmas
Summary: Zirconium diboride ceramics were prepared with additions of up to 50 vol.% TiB2 and formed solid solutions. The addition of TiB2 resulted in decreased grain size and thermal conductivity. At high temperatures, the electron contribution to thermal conductivity was influenced by the addition of TiB2.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Hu-Lin Liu, Ji-Xuan Liu, Wei-Chao Bao, Fang-Fang Xu, Guo-Jun Zhang
Summary: ZrB2-based ceramics containing SiC and/or ZrC were prepared via hot-pressing sintering. The study revealed that the introduction of ZrC led to more orderly arrangement of atoms at ZrB2-ZrB2 grain boundaries and a decrease in the percentage of rounded grain boundaries. Additionally, the atomic arrangement at ZrB2-ZrC interfaces satisfies a unique orientation relationship.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Ceramics
Yashpal Gupta, B. Venkata Manoj Kumar
Summary: This study investigates the friction and wear of spark plasma sintered ZrB2-SiC composites in dry unlubricated conditions against different counterbodies. It is found that composites with higher SiC content exhibit lower friction and wear, and the thermal conductivity of the counterbody influences the friction and wear of the composites.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Eric W. Neuman, Matthew J. Thompson, William G. Fahrenholtz, Gregory E. Hilmas
Summary: The heating rate significantly influences the microstructure and properties of zirconium diboride ceramics, with slower rates resulting in larger grains and retained ZrO2 particles, while faster rates leading to rapid densification but also microcracks.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Francesca Servadei, Luca Zoli, Pietro Galizia, Andreana Piancastelli, Diletta Sciti
Summary: Uncoated PAN-based carbon fibre-reinforced ultra-high temperature ceramic matrix composites were manufactured using aqueous ZrB2 powder-based slurry impregnation, mild polymer infiltration, and pyrolysis with allylhydrido polycarbosilane. Different cloth architectures, including unidirectional (UD), two-dimensional (2D), and needle-punched (2.5D), were impregnated to demonstrate the versatility of the process. The microstructure and mechanical properties were studied and correlated with fiber properties and architecture. The process resulted in a homogeneous distribution of UHTC phase around each fiber and a weak fiber/matrix interface, leading to improved durability and performance in extreme environments without the need for expensive fiber coating.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Leyla Yanmaz, Filiz Cinar Sahin
Summary: Square-shaped monolithic B4C and B4C-ZrB2 composites were produced using SPS method. The addition of 5, 10, 15 vol% ZrB2 had an effect on the densification, mechanical and microstructural properties of boron carbide. The density of B4C increased with increasing volume fraction of ZrB2 and the density differences in different regions of the sample decreased. The addition of ZrB2 enhanced the hardness and fracture toughness of the composites compared to monolithic B4C. The B4C-15 vol% ZrB2 composite exhibited superior properties with a hardness of 33.08 GPa and Vickers indentation fracture toughness of 3.82 MPa·m1/2.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Babak Bakhit, Samira Dorri, Ali Kosari, Arjan Mol, Ivan Petrov, Jens Birch, Lars Hultman, Grzegorz Greczynski
Summary: In this study, Zr1-xCrxBy coatings were deposited using hybrid high power impulse/DC magnetron sputtering. The microstructure, mechanical properties, and corrosion resistance of these coatings were investigated. It was found that the dense films can be achieved by controlling the ratio of Cr+-dominated ion flux and (Zr + B) neutral flux. The alloys were categorized into two groups based on the Cr+/(Zr + B) ratios, and the films with higher Cr+/(Zr + B) ratios exhibited smoother surfaces and denser microstructure. The pulsed metal-ion irradiation was more effective in film densification compared to continuous Ar+ bombardment. These coatings showed high hardness, low stress, and low corrosion rates.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Aykut Ak, Oguz Karaahmet, Bugra Cicek
Summary: Zirconium diboride (ZrB2) and Zirconium dioxide (ZrO2) advanced ceramics were investigated for their corrosion resistance at high temperatures. The ceramics were milled with vitrified frit and other suspending agents, and then subjected to erosion/corrosion testing using hot sodium hydroxide (NaOH) and hydrochloric acid (HCl). The addition of ceramics improved the corrosion resistance of the coating, but compromised its acid resistance.
MATERIALS TODAY COMMUNICATIONS
(2023)
