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, 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, 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
Chemistry, Physical
Shipra Bajpai, Kunwar Pratap Singh, Alok Bhadauria, T. Venkateswaran, Tapas Laha, Anish Upadhyaya, Kantesh Balani
Summary: In this study, the wettability of diborides in contact with a filler layer was evaluated using a powder-based approach. The results showed that surface roughness affects the spreading of molten Ni on the diboride surface, and the addition of hydrogen gas improves the wettability. Successful brazing of the diboride composites with a Ni interlayer resulted in microstructural inhomogeneity, but the lower interfacial residual stresses provided structural integrity between the ceramic and metal layers.
SURFACES AND INTERFACES
(2023)
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
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
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
S. Dinesh Kumar, M. Ravichandran, A. Jeevika, B. Stalin, C. Kailasanathan, A. Karthick
Summary: A new class of aluminium alloy matrix composites reinforced with ZrB2 particles was developed using the bottom pouring type stir casting process. The addition of ZrB2 particles improved the mechanical and corrosion behaviors of the composites. Through electrochemical assessments and SEM analysis, the homogeneous distribution of ZrB2 particles and the enhanced corrosion resistance of the composites were demonstrated.
CERAMICS INTERNATIONAL
(2021)
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, 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
Anna N. Dorner, Frederic Monteverde, William G. Fahrenholtz, Gregory E. Hilmas
Summary: In this study, a solid-state formation mechanism for core-shell microstructures in (Zr,Ta)B-2 ceramics and ZrB2-TaB2 diffusion couples is proposed, and it is demonstrated that core-shell microstructures can be developed through Ta diffusion along ZrB2 grain boundaries and lattice diffusion of Ta into ZrB2.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Xiaotong Pang, Zhihui Xiong, Shilong Liu, Junhao Sun, R. D. K. Misra, H. Kokawa, Zhuguo Li
Summary: Significant grain refinement of beta grains in metastable beta TB2 titanium alloy was achieved through the minor addition of zirconium diboride during laser melting deposition. The addition of 0.5 wt% ZrB2 resulted in smaller beta grains and improved mechanical properties, including higher ultimate tensile strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Amy Wat, Ashley L. Hall, Qi Rong (Bruce) Yang, Ryan Lu, Elizabeth Sobalvarro Converse, Congwang Ye, Gabriella C. S. King, Joshua D. Kuntz, Marcus A. Worsley, James T. Cahill, Wyatt L. Du Frane
Summary: This paper presents a scalable gelcasting solution and unique emulsification process to enhance the flowability and handleability of ceramic nanograined materials. Microspheres composed of nanoscale powders were successfully produced, maintaining the characteristics of the nanomaterials while improving their flowability.
CERAMICS INTERNATIONAL
(2022)
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, 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, Multidisciplinary
S. E. Kravchenko, A. G. Burlakova, I. A. Domashnev, A. A. Vinokurov, S. P. Shilkin
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2019)
Article
Materials Science, Multidisciplinary
S. E. Kravchenko, I. A. Domashnev, N. N. Dremova, A. A. Vinokurov, S. P. Shilkin
INORGANIC MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
D. Yu. Kovalev, S. V. Konovalikhin, G. V. Kalinnikov, I. I. Korobov, S. E. Kravchenko, N. Yu. Khomenko, S. P. Shilkin
INORGANIC MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
I. I. Korobov, D. Yu. Kovalev, G. V. Kalinnikov, S. V. Konovalikhin, N. Yu. Khomenko, A. A. Vinokurov, A. V. Ivanov, S. P. Shilkin
INORGANIC MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
I. I. Korobov, D. Yu. Kovalev, A. A. Vinokurov, S. E. Nadkhina, G. V. Kalinnikov, S. V. Konovalikhin, N. Yu. Khomenko, S. P. Shilkin
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
S. E. Kravchenko, A. A. Vinokurov, N. N. Dremova, S. E. Nadkhina, S. P. Shilkin
Summary: Nanosized niobium diboride particles with an average diameter of 65 nm were successfully synthesized by reacting amorphous boron with niobium powder at 1073 K in argon atmosphere in KCl and Na2B4O7 ionic melts (autoclave, argon pressure of 4 MPa, 32 h).
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2021)
Article
Materials Science, Ceramics
D. Yu Kovalev, N. Yu Khomenko, S. P. Shilkin
Summary: The research investigated the thermal expansion of nano- and microcrystalline TiB2 using high-temperature X-ray diffraction, finding that the thermal expansion coefficient of nanocrystalline TiB2 is temperature-independent while that of microcrystalline TiB2 varies with temperature. This study has implications for the thermal expansion properties of TiB2.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
S. E. Kravchenko, D. Yu Kovalev, A. A. Vinokurov, N. N. Dremova, A. Ivanov, S. P. Shilkin
Summary: A method was developed to synthesize nanocrystalline NbB2 powder with specific structure and parameters, oxidation rate and activation energy were experimentally determined under certain temperature and pressure conditions.
INORGANIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
A. A. Vinokurov, N. N. Dremova, S. E. Nadkhina, A. Ivanov, S. P. Shilkin
Summary: Near-spherical niobium diboride nanoparticles with an average diameter of about 17 nm were synthesized by reacting NbCl5 with NaBH4 in ionic melts of alkali metal halides at 1073 K under an argon pressure of 4 MPa for 15 hours in an autoclave.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2022)
Article
Metallurgy & Metallurgical Engineering
I. I. Korobov, G. V. Kalinnikov, A. V. Ivanov, N. N. Dremova, A. A. Belmesov, S. P. Shilkin
PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES
(2020)
Article
Materials Science, Multidisciplinary
A. A. Vinokurov, D. Yu. Kovalev, I. I. Korobov, O. V. Kravchenko, S. V. Konovalikhin, N. Yu. Khomenko, G. V. Kalinnikov, S. E. Nadkhina, S. P. Shilkin
INORGANIC MATERIALS
(2020)
Article
Physics, Applied
D. Yu Kovalev, S. R. Shilkin, S. Konovalikhin, G. Kalinnikov, I. I. Korobov, S. E. Kravchenko, N. Yu Khomenko, R. A. Andrievskii