Article
Materials Science, Ceramics
Van-Huy Nguyen, Mehdi Shahedi Asl, Seyed Ali Delbari, Quyet Van Le, Abbas Sabahi Namini, Joo Hwan Cha, Sea-Hoon Lee, Ho Won Jang, Mohsen Mohammadi, Mohammadreza Shokouhimehr
Summary: The addition of SiC significantly enhanced the sintering behavior of the ZrB2-hBN composite, leading to near fully dense material. The role of SiC in oxide removal was found to be the chief cause in improving the sinterability of the ZrB2-SiC-hBN sample.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Eid M. Alosime, Mohammed S. Alsuhybani, Mohammed S. Almeataq
Summary: The study aims to develop a structural ceramic for high-temperature applications using SiC as matrix composites and analyzing the plasma spray coating of SiC and ZrB2. The results show a great potential for the studied material in protecting against high-temperature oxidation and in a wide variety of aerospace applications.
Article
Chemistry, Physical
Elizaveta P. Simonenko, Nikolay P. Simonenko, Anatoly F. Kolesnikov, Aleksey V. Chaplygin, Anton S. Lysenkov, Ilya A. Nagornov, Artem S. Mokrushin, Nikolay T. Kuznetsov
Summary: A method of fabricating dense ultra-high temperature ceramic materials was developed using sol-gel synthesis and reaction hot pressing approaches. The introduction of multilayer nanotubes increased the consolidation efficiency of ceramics, and the materials were characterized by various physical and chemical analysis methods. The study also found significant changes in the chemical composition and surface microstructure of the modified sample.
Article
Materials Science, Ceramics
Jecee D. Jarman, William G. Fahrenholtz, Greg E. Hilmas, Jeremy L. Watts, Derek S. King
Summary: The mechanical properties of welded SiC-ZrB2 and SiC-ZrB2-ZrC ceramics were measured and compared. The toughness and strength of the parent materials decreased after welding. The strength of the parent materials was influenced by the size of SiC clusters, while the strength of the welds was controlled by the size of pores in the fusion zones.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Kubra Gurcan, Erhan Ayas, Ilker Yurdabak, M. Safa Gungoren
Summary: In this study, the effect of adding YAG into ZrB2-SiC composites was investigated. The results showed that the sintering mechanism changed and the density and fracture toughness of the composites improved with the incorporation of YAG, while the hardness and elastic modulus slightly decreased.
SCIENCE OF SINTERING
(2022)
Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Shukuan Guo, Hong Sun
Summary: Recent research has identified the observed GBs in ZrB2 and TiB2 films as Sigma(13) [001] tilt GBs through first-principles calculations, explaining the formation energies and TM vacancies on the GBs. Under shear stresses beneath indentors, the motion of the GBs transforms accumulated shear stresses into vertical sliding of nano grains, correlating their hardness to compressive strengths and accounting for the measured superhardness in these films.
Article
Multidisciplinary Sciences
Seyed Ali Delbari, Abbas Sabahi Namini, Seonyong Lee, Sunghoon Jung, Jinghan Wang, Sea-Hoon Lee, Joo Hwan Cha, Jin Hyuk Cho, Ho Won Jang, Soo Young Kim, Mohammadreza Shokouhimehr
Summary: This study evaluated the sinterability and microstructure of ZrB2-SiC-TaN and ZrB2-TaN ceramics. The addition of SiC increased the relative density of ZrB2 ceramics and contributed to the elimination of ZrB2 surface oxides. In situ formation of hexagonal boron nitride at the interface of TaN and ZrB2 was confirmed. In addition, in situ graphite might be produced as a byproduct, facilitating the reduction of oxide compounds in the ternary system.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Ceramics
Elizaveta P. Simonenko, Nikolay P. Simonenko, Anatoly F. Kolesnikov, Aleksey Chaplygin, Anton S. Lysenkov, Ilya A. Nagornov, Tatiana L. Simonenko, Sergey P. Gubin, Vladimir G. Sevastyanov, Nikolay T. Kuznetsov
Summary: The study investigates the oxidation resistance of ultra-high-temperature ceramic material modified with reduced graphene oxide under long-term exposure to supersonic air flow. The results show that the graphene-modified ceramics exhibit reduced oxidation rate and thickness of the oxidized layer, attributed to the higher thermal conductivity of the material that enhances heat transfer efficiency.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Coatings & Films
Benjamin W. Lamm, Jake W. McMurray, Ercan Cakmak, Michael J. Lance, David J. Mitchell
Summary: In this study, the CALPHAD approach was used to investigate zirconium carbide deposition. Phase equilibria were calculated and used to explore the chemical vapor deposition (CVD) processing space in the ZrCl4-CH3SiCl3-CH4-H-2 system. The results showed that the most important factor in controlling the composition was the ratios of CH4:ZrCl4, which determined the nature of the composition - either carbide or silicide.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Wuqing Lin, Zhongwei Hu, Yue Chen, Yuqiang Zhang, Yiqing Yu, Xipeng Xu, Jie Zhang
Summary: This article investigates the vibration-assisted nano-scratch process to understand the material removal and damage formation mechanisms in SiC during vibration-assisted grinding. The study finds that the response to vibration-assisted scratch differs among SiC crystal structures, and increasing the frequency and amplitude improves the machining effect.
Article
Materials Science, Ceramics
Peng Zhang, Zhibing Zheng, Kaiwen Zhuang, Chenxi Sun, Zhaoju Yu, Jiangxi Chen, Guomei He
Summary: In this study, a ZrO2 reinforced SiC-ZrB2 polycrystalline fiber was successfully prepared at a low temperature using the polymer-derived ceramic method. The formation of t-ZrO2 at relatively low temperature and the generation of high-quality fiber products after heat treatment were the most interesting findings. This study provides a novel method for the fabrication of SiC-based polycrystalline fiber at a low temperature.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
O. N. Grigoriev, A. Stepanenko, V. B. Vinokurov, I. P. Neshpor, T. Mosina, L. Silvestroni
Summary: The stress-strain state of ZrB2-SiC ultra-high-temperature ceramics, produced using commercial powders with different impurity levels, was investigated by X-ray diffraction. The level of thermal stresses of the different phases was determined based on the analysis of ZrB2 and SiC diffraction lines shift. Ceramics with high viscous-brittle transition temperatures and internal stresses exhibited high strength.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Loke Kok Foong, Chengyong Xu
Summary: This study investigated the individual and synergistic impacts of SiC and TiN additives on the sinterability and microstructure of TiB2-based ceramics. The results confirmed the beneficial role of the additives in achieving near full densities of the samples, and revealed the in-situ formation of SiO2 in the TiB2-SiC system and hexagonal BN in the TiB2-TiN system. Additionally, the formation of TiC and TiC0.3N0.7 ingredients was observed during the hot pressing process in the ternary system of TiB2-SiC-TiN.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
O. Grigoriev, I Neshpor, D. Vedel, T. Mosina, L. Silvestroni
Summary: The addition of chromium diboride was found to lower the sintering temperature and improve powder consolidation by forming low-melting phases. The combination with different components resulted in varied oxidation behaviors, affecting the oxidation resistance of the materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Mechanics
Salil Bavdekar, Gregory Parsard, Ghatu Subhash, Sikhanda Satapathy
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2017)
Article
Engineering, Mechanical
Nikhil D. Londhe, Nagaraj K. Arakere, Ghatu Subhash
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2018)
Article
Multidisciplinary Sciences
Saranya Canchi, Malisa Sarntinoranont, Yu Hong, Jeremy J. Flint, Ghatu Subhash, Michael A. King
Article
Nanoscience & Nanotechnology
Cody Kunka, Amnaya Awasthi, Ghatu Subhash
SCRIPTA MATERIALIA
(2017)
Article
Materials Science, Multidisciplinary
Cody Kunka, Qi An, Nicholas Rudawski, Ghatu Subhash, James Zheng, Virginia Halls, Jogender Singh
Article
Physics, Applied
Jong Cheol Kim, Jongsik Kim, Yan Xin, Jinhyung Lee, Young-Gyun Kim, Ghatu Subhash, Rajiv K. Singh, Arul C. Arjunan, Haigun Lee
APPLIED PHYSICS LETTERS
(2018)
Article
Construction & Building Technology
Jovan Tatar, Natassia R. Brenkus, Ghatu Subhash, Curtis R. Taylor, H. R. Hamilton
CEMENT & CONCRETE COMPOSITES
(2018)
Article
Engineering, Mechanical
Salil Bavdekar, Ghatu Subhash
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2018)
Article
Engineering, Manufacturing
Bijan Nili, Ghatu Subhash, James S. Tulenko
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2018)
Article
Materials Science, Ceramics
Gregory Parsard, Ghatu Subhash, Phillip Jannotti
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2018)
Article
Materials Science, Ceramics
Matthew DeVries, Ghatu Subhash, Alexander Mcghee, Peter Ifju, Tyrone Jones, James Zheng, Virginia Halls
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2018)
Article
Nanoscience & Nanotechnology
Jong Cheol Kim, Jinhyung Lee, Jongsik Kim, Rajiv K. Singh, Puneet Jawali, Ghatu Subhash, Haigun Lee, Arul Chakkaravarthi Arjunan
SCRIPTA MATERIALIA
(2018)
Article
Materials Science, Multidisciplinary
Cody Kunka, Xiaokun Yang, Qi An, Ghatu Subhash
PHYSICAL REVIEW MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Phillip Jannotti, Ghatu Subhash, James Zheng, Virginia Halls
Article
Materials Science, Multidisciplinary
Abir Bhattacharyya, Nikhil Londhe, Nagaraj Arakere, Ghatu Subhash
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2017)
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.
