Article
Materials Science, Multidisciplinary
Shaohua Zhang, Jinfang Wang, Meng Zhang, Longqi Ding, Huijun Chan, Xiyu Liu, Fengqing Wu, Zhibiao Tu, Ling Shao, Nengyong Ye, Sheng Dai, Liu Zhu, Shichang Chen
Summary: Sintering additives were used to fabricate SiC/SiCw-Y2O3 composite ceramics with different Y2O3 contents. The results showed that increased Y2O3 content promoted densification and improved the mechanical properties of the composite ceramics. However, excessive Y2O3 weakened its positive effect. The Y2O3 additive also reduced the coefficient of friction, and the SiC ceramic with 7.5 vol.% Y2O3 exhibited optimal wear resistance.
Article
Engineering, Chemical
Wai Kian Tan, Takaya Kuwana, Atsushi Yokoi, Go Kawamura, Atsunori Matsuda, Hiroyuki Muto
Summary: By controlling the formation of composite particles, improved laser absorbance and reduced volume shrinkage during the sintering process can be achieved, providing a key platform for ceramic material fabrication through the directed energy deposition route.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Le Wang, Shangwu Fan, Shaobo Yang, Biao Ji, Chenghua Luan, Bohan Zheng, Juanli Deng, Laifei Cheng
Summary: The study investigated the joining performance of CYAS glass powder sintered under different temperature conditions with SiCf/SiC composites. The joint prepared under 1400 degrees C/30 min condition was the densest, defect-free, with the highest shear strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Huanxiang Lv, Qi Zhou, Yunfeng Su, Shuna Chen, Hengzhong Fan, Junjie Song, Yongsheng Zhang, Litian Hu
Summary: A series of Al2O3 composite ceramics were developed with short Al2O3 fibers and a compound interface phase, which improved the damage tolerance and overcame the brittleness of ceramic materials.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Sheng-Jin He, Ling-Feng Su, Chuang-Tian Zhan, Wei-Ming Guo, Shi-Kuan Sun, Hua-Tay Lin
Summary: By using SiO2-based liquid phase extrusion strategy with Y2O3-Al2O3-SiO2 as the filler, the joining temperature of SiC ceramics was effectively reduced to 1550 degrees Celsius.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
X. W. Nie, Q. Lu
Summary: The ZrO2-SiC/MoSi2 composite ceramics were prepared by powder metallurgy. The room temperature and high temperature fracture toughness of various composite ceramics were measured, and the synergistic effects mechanism of nano-ZrO2 and SiC particles on the fracture toughness of MoSi2 nanocomposite ceramics was discussed.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Pavel Andreev, Pavel Drozhilkin, Lyudmila Alekseeva, Ksenia Smetanina, Elena Rostokina, Stanislav Balabanov, Maksim Boldin, Artem Murashov, Gleb Shcherbak
Summary: The ceramic samples made from silicon nitride (Si3N4) powder mixtures fabricated by spark plasma sintering were investigated. Wet chemical methods were used to prepare the powder mixtures from commercial alpha-Si3N4 powder and Y2O3-Al2O3 sintering additive. The sintering process, powder mixtures, and ceramic samples were characterized, and the properties such as density, microhardness, and fracture toughness were measured. The amount of sintering additive affected the shrinkage temperature and the amount of beta-Si3N4 in the ceramics.
Article
Chemistry, Multidisciplinary
Asif Ur Rehman, Abid Ullah, Tingting Liu, Rashid Ur Rehman, Metin U. Salamci
Summary: In this study, a new slurry-based approach for laser powder bed fusion (LPBF) of ceramics was investigated, which showed significant advantages compared to indirect selective laser sintering (SLS) of ceramic powders. The addition of magnesia had a substantial influence on the microstructure of alumina ceramic, and high laser power with low magnesia load improved the surface quality of the printed parts. Slurry ceramic parts without binders were successfully produced through LPBF. Additionally, the effects of SiC and magnesia loads on the microstructure and surface morphology of alumina were compared and analyzed.
FRONTIERS IN CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Haopeng Cai, Yinglong Wei, Baoguo Wang, Kun Jiang
Summary: In this study, SiC/Al2O3/TiB2 ceramic composites were prepared by spark plasma discharge sintering, and cracks were introduced on the surface of the polished specimens. It was found that the surface cracks of the material were completely filled and healed by oxidation products after heat treatment at 700 degrees C for 60 min, and the highest healing efficiency exceeded 95% for both specimens with different crack lengths. The main mechanism of crack healing was the reaction of TiB2 and a small amount of SiC with oxygen to produce oxides and glass powder.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yang Zhang, Kai Zhang, Dan Chen, Tingting Liu, Zhiwei Xiong, Shurui Li, Fazhi Li, Zhiguang Zhu
Summary: This research systematically studied the characterization and propagation of cracks in Al2O3-ZrO2 eutectic ceramics produced by laser powder bed fusion. It was found that by adjusting the process parameters, cracks can be minimized and healed. An optimized set of parameters was used to obtain crack-free samples. Three different microstructures were identified, with the cellular microstructure showing improved crack inhibition capability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Shuixian Yang, Jianmin Li, Hao Guo, Xiaojian Mao, Run Tian, Jian Zhang, Shiwei Wang
Summary: Highly transparent aluminate oxynitride (AlON) ceramics were successfully prepared by reactive sintering with a Y2O3-MgAl2O4-H3BO3 ternary additive, showing small grains and high transmittance. The addition of 0.1 wt.% Y2O3, 0.4 wt.% MgAl2O4, and 0.12 wt.% H3BO3 resulted in the best performance in terms of thickness and transmittance for AlON ceramics prepared by this method.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
D. A. Permin, S. V. Egorov, A. V. Belyaev, S. S. Balabanov, V. A. Koshkin, M. S. Boldin, A. V. Novikova, O. V. Timofeev, I. V. Ladenkov
Summary: A method for preparing dense Y2O3-MgO composite ceramics by microwave sintering was developed. The initial powders were obtained using glycine-nitrate self-propagating high-temperature synthesis (SHS) with different oxidant-to-fuel ratios. The density and IR-transmission of the microwave sintered Y2O3-MgO ceramics increased with the dispersity of the SHS powders and reached maximum values for the powder prepared with a 20% fuel excess. The sintering behavior of Y2O3-MgO compacts was investigated using optical dilatometry and conductivity measurements. Significant microwave radiation power surges at temperatures of 900-1000 degrees C, caused by the decomposition of magnesium carbonate, were observed. By matching the conditions for powder synthesis and sintering modes, a transmission of 78% at a wavelength of 6 μm was achieved for the composite ceramics at a maximum processing temperature of 1500 degrees C.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Shengqiang Jiang, Chao Tang, Ying Ye, Sisi Liu, Yuanqiang Tan, Jingang Liu, Shiping Yang
Summary: This study investigates the impact of single-flaw defects on the bending strength of SiC ceramics using numerical simulation methods, revealing that different parameters affect material properties, and changes in flaw inclination angle may induce the generation of secondary cracks.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Haifang Liu, Haijun Su, Zhonglin Shen, Di Zhao, Yuan Liu, Yinuo Guo, Huitian Guo, Min Guo, Keyu Xie, Jun Zhang, Lin Liu, Hengzhi Fu
Summary: This study successfully fabricated near-full-density Al2O3/GdAlO3/ZrO2 ternary eutectic ceramics with different shapes and smooth surfaces using a synchronized-powder-feeding-based laser directed energy deposition (LDED) technique. The microstructure characteristics and formation mechanism of the observed periodic banded structures were systematically studied, revealing the drastic abnormal coarsening of nanoscale microstructures as the cause. Additionally, a physical model was proposed to illustrate the microstructure evolution of the 3D-printed eutectic ceramic.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Tianbin Zhu, Weijie Guo, Jie Zhang, Shaobai Sang, Yawei Li, Zhipeng Xie, Xiong Liang, Heng Wang, Yao Han
Summary: Zirconia ceramics with superior mechanical properties were fabricated by adding SiC whiskers and SiC particles and using oscillatory pressure sintering technique. The ceramics exhibited improved Vickers hardness, bending strength, and fracture toughness. The enhanced toughness was attributed to synergistic toughening effects including whisker toughening, stress-induced phase transformation toughening, and particle dispersion toughening.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Thi Tuong Vy Phan, Van Tu Nguyen, Seok-Hwan Ahn, Junghwan Oh
EUROPEAN POLYMER JOURNAL
(2019)
Article
Chemistry, Physical
Seok-Hwan Ahn, Jongman Heo, Jungsik Kim, Hyeongseob Hwang, In-Sik Cho
Article
Materials Science, Coatings & Films
Seok-Hwan Ahn, Auezhan Amanov
Summary: This study investigated the effects of crosswise repetitive ultrasonic nanocrystal surface modification (CR-UNSM) treatment on the surface characteristics, tribological, and fatigue properties of Inconel 690 alloy. The results showed that all the CR-UNSM-treated specimens exhibited improved tribological and fatigue performance compared to the untreated specimens. The triple CR-UNSM-treated specimen showed the best fatigue performance, while the quintuple CR-UNSM-treated specimen had the lowest coefficient of friction and specific wear rate. The surface roughness of the alloy decreased after a single CR-UNSM treatment but increased gradually with more treatments. The surface hardness, hardened surface layer, and compressive residual stress also increased with the number of CR-UNSM treatments. Each CR-UNSM treatment was able to refine coarse grains into nano-scale grains, resulting in a thicker nanostructured surface layer and finer grain size with more treatments.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Seok-Hwan Ahn, Ki-Woo Nam
Summary: The study focused on using TiO2 and SiO2 to enhance the strength and crack healing properties of ceramics, showing improved bending strength, friction coefficient, and wear loss compared to non-added materials.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2021)
Article
Materials Science, Ceramics
Ye-Na Lee, Seok-Hwan Ahn, Hoseok Nam, Ki-Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2018)
Article
Materials Science, Ceramics
Kwang-Ho Lee, Seok-Hwan Ahn, Ki-Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2018)
Article
Materials Science, Ceramics
Kwang-Ho Lee, Ki-Woo Nam, Seok-Hwan Ahn
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2017)
Article
Materials Science, Ceramics
Seok-Hwan Ahn, Ki-Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2017)
Article
Materials Science, Ceramics
Seok-Hwan Ahn, Ki-Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2017)
Article
Engineering, Mechanical
Seok Hwan Ahn, Dae Sik Kim, Ki Woo Nam
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS A
(2016)
Article
Materials Science, Ceramics
Kiwoo Nam, Heerok Jeong, Jongwon Kim, Seokhwan Ahn
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2016)
Article
Materials Science, Ceramics
Seok-Hwan Ahn, Ki-Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2016)
Article
Materials Science, Ceramics
Sang-Cheol Jeong, Seok-Hwan Ahn, Ki-Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2016)
Article
Materials Science, Ceramics
Seok Hwan Ahn, Chang Yong Kang, Ki Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2017)
Article
Materials Science, Ceramics
Sang-Cheol Jeong, Seok-Hwan Ahn, Ki-Woo Nam
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2017)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
