Article
Chemistry, Physical
Chaopeng Zhao, Weishan Yan, Suqin Han, Wangyang Zhang, Min Jin, Duo Liu
Summary: This study reports a mechanically induced phase transition in 2D layered beta-InSe materials and the corresponding changes in electronic properties. The critical pressure required for the transition and the material changes were determined using nanoindentation and confocal Raman spectroscopy, respectively. The results were confirmed by high-resolution transmission electron microscopy. This research is significant for the development of InSe-based optoelectronic devices with mechanically accessible bandgap engineering.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Kai Chen, Qunbo Fan, Lin Yang, Shun Xu, Jiahao Yao, Yu Gao, Wei Lei
Summary: A novel metastable beta-type Ti-6Mo-3.5Cr-1Zr alloy is designed using d-electrons theory to introduce diverse phase transformations. Stress-induced omega (SI omega) phase transformation dominates the initial deformation, while the SI omega bands are transformed to alpha+beta phase as the strain increases. The sequential mechanism associated with beta -> SI omega ->alpha+beta is first reported in titanium alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Chunlei Zheng, Yupeng Zhang, Shuoyan Li, Peijun Zhang, Jinku Yu, Fucheng Zhang
Summary: The formation process of nanocrystalline layer on the rolling contact surface of bainitic steel was investigated. The results reveal that there is a cycle of nanocrystalline layer generation, spalling, and production on the surface. The decrease in the steel surface's elastic modulus indicates the initiation of fatigue damage.
Article
Spectroscopy
DongFei Li, Shuo Zhang, Hongsheng Jia, Mingxing Song, Ying Zhang, Haibo Li, Mi Zhou
Summary: In this study, high pressure Raman research was conducted on lithium perchlorate crystal, and it was found that the crystal undergoes phase transformations under different pressure conditions, which has significant implications for its performance.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Spectroscopy
Baoyun Wang, Kexin Sun, Gaobin Chu
Summary: The structural behavior of TmVO4 under high pressures was investigated by Raman spectroscopy, revealing three phase transitions and providing insights into the vibrational differences and lattice structures of different polymorphs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Materials Science, Multidisciplinary
Yu Lei, Mingjun Chen, Yifeng Li, Wenming Zhang, Danyang Zhao, Qiancheng Zhu
Summary: In this study, a dendrite-free potassium (K) anode was obtained by plating K metal on MoS2-modified carbon cloth (MoS2/CC@K), enabling the uniformly deposition of K and suppressing the formation of dendrites. The symmetric MoS2/CC@K cells exhibited low voltage hysteresis and superior cycling stability. This strategy also showed excellent electrochemical performance on Li and Na metal anodes.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Ceramics
Guian Man, Yixuan Jiang, Xingzhe Wang
Summary: In this study, the phase transition behavior of relaxor ferroelectric PMN-PT single crystals under mechanical load was investigated. It was found that the rhombohedral phase can be transformed to the tetragonal phase under mechanical stress, and the tetragonal phase exhibits structural stability. These findings suggest that the relaxor ferroelectric single crystals have the potential for mechanical controllability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Zhuohui Zeng, Xian Chen
Summary: An experimental platform combining DSC with DInM was established, and experiments on an alloy were conducted to confirm the agreement between phase formation events observed by DInM and heat exchange profile characterized by DSC. Through quantitative analysis, it was discovered that there is a linear scaling law between twin evolution time and fineness.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Zhiping Li, Liangshun Luo, Yanqing Su, Lei Luo, Binbin Wang, Liang Wang, Mengjia Yao, Jingjie Guo, Hengzhi Fu
Summary: The study investigated the b/a transformation of a b-solidifying c-TiAl alloy at different cooling rates. It was found that high cooling rate can promote the growth rate of Widmannstatten a plates, improving the mechanical properties of the alloy.
Article
Materials Science, Multidisciplinary
Xiangyu Zhu, Byung Oh Jung, Qingxiao Wang, Yaoqiao Hu, Myungshin Choi, Sunyong Song, Seok Namkung, Namseok Kang, Hui-Youn Shin, Minho Joo, M. J. Kim
Summary: This study investigated the phase transformation and microstructure evolution of magnetic Nd-Ce-Fe-B nanocrystalline melt-spun ribbon. The results revealed the accumulation of rare earth elements at grain boundary areas and the formation of an amorphous layer between grains at high temperatures. Additionally, the primary phase decomposed and transformed into other phases at elevated temperatures.
MATERIALS & DESIGN
(2022)
Article
Engineering, Chemical
Lihong Xu, Peng Lin, Yangyang Gao, Yongbo Qin, Zhanglian Xu, Fuzhu Liu
Summary: This research presents the fabrication of pristine 13-Bi2O3 microflowers with high adsorption ability for selenite and iodide. The adsorbents exhibit excellent selectivity and stability in the presence of competitive anions. The findings suggest that pristine 13-Bi2O3 microflowers have potential applications in the extraction and immobilization of radioactive anions from wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Siyu Lu, Shenglu Lu, Biao Chen, Ma Qian, Qiuming Wei, Katsuyoshi Kondoh, Jianghua Shen
Summary: In this study, in-situ high temperature electron back-scatter diffraction (HT-EBSD) was used to investigate the phase transformation in Grade 1 commercially pure titanium (CP Ti). The results showed that the transformation from alpha-Ti to beta-Ti followed the Burgers orientation relationship (BOR), while the transformation from beta-Ti to alpha-Ti during continuous cooling led to the formation of Type 2 alpha-variants that defied the BOR. This phenomenon, not reported before for CP Ti, was attributed to the fast cooling process and the lattice mismatch between the two phases.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Ceramics
Michael J. Lance, Mackenzie J. Ridley, Kenneth A. Kane, Bruce A. Pint
Summary: In order to accurately model the long-term durability of environmental barrier coatings (EBCs), it is important to have a more complete understanding of the phase composition and transformations of the thermally grown oxide SiO2 (TGO). This study used Raman micro-spectroscopy to quantify the cristobalite transformation on the TGO surface at different ramp rates. The alpha -> beta phase transformation generated a tensile stress in the Si substrate, which matched well with the stress predicted from the volumetric expansion of the cristobalite. Quantifying the phase transformation and residual stress are critical for developing the next generation of high performance EBCs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Metallurgy & Metallurgical Engineering
Run-run Xu, Miao-quan Li
Summary: The microstructure of isothermally compressed gamma-TiAl alloy was analyzed, revealing an increase in beta(0) grains and a decrease in remnant alpha(2)/gamma lamellar colonies and alpha(2) grains, while the volume fraction of gamma grains increased. The study also found that isothermal compression accelerates the alpha ->gamma phase transformation, with the first transformation resembling ledge-controlled transformation. Additionally, the second transformation is achieved by alpha/gamma phase interface immigration.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Energy & Fuels
F. Vautard, E. Cakmak, M. Arnould, T. R. Watkins, R. Paul, H. Meyer III, J. Damron, N. Gallego, E. Lara-Curzio
Summary: In this study, the phase transformation and molecular structure evolution of petroleum-derived pitch were analyzed using in situ and ex situ experimental techniques. It was found that complementary experimental techniques can effectively describe complex mechanisms during the processing of organic materials.
Article
Materials Science, Ceramics
Kenneth Kane, Eugenio Garcia, Padraig Stack, Michael Lance, Cory Parker, Sanjay Sampath, Bruce A. Pint
Summary: The study shows that EBCs have a certain effect on reducing the rate of SiO2 formation, especially when paired with a Si bond coating. The adhesion of the coating and roughness of the substrate play a crucial role in the effectiveness of EBCs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Kenneth Kane, Eugenio Garcia, Michael Lance, Cory Parker, Sanjay Sampath, Bruce Pint
Summary: Environmental barrier coatings (EBCs) are crucial for protecting SiC-based ceramic matrix composite components in next-generation high-efficiency industrial gas turbines (IGTs). However, limited data on EBC failure mechanisms exist, particularly at high temperatures. Experimental results showed that at elevated temperatures, EBCs formed thick, highly cracked, and fully crystalline cristobalite scales.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
P. Stack, K. Kane, M. Sweet, C. Parker, M. Lance, M. Ridley, B. Pint
Summary: Mixed Y and Yb disilicate coatings were compared to ytterbium disilicate/ytterbium monosilicate coatings in terms of oxidation performance, suggesting the former has advantages in oxidation layer formation and kinetics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Corson L. Cramer, Hsin Wang, Michael J. Lance, Artem A. Trofimov, Ercan Cakmak, Zhi-He Jin
Summary: Functionally graded material (FGM) ZnO is prepared by varying Al dopant content, and its thermoelectric properties and structural characteristics are studied. The decrease in Al content leads to noticeable grain growth, with a common, random preferred orientation observed in all layers.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yukinori Yamamoto, Michael P. Brady, Qing-Qiang Ren, Jonathan D. Poplawsky, David T. Hoelzer, Michael J. Lance
Summary: This study investigates the creep-rupture behavior and microstructural response of alumina-forming austenitic alloys with different precipitation strengthening mechanisms. The results provide important insights for guiding and verifying computational alloy design and life-prediction modeling.
Article
Materials Science, Ceramics
Qianying Guo, Tianli Feng, Michael J. Lance, Kinga A. Unocic, Sokrates T. Pantelides, Edgar Lara-Curzio
Summary: The chemical and structural stability of two commercial multicomponent silicate glasses (SCN and G6) in contact with yttria-stabilized zirconia (YSZ) were studied after exposure at 800 degrees C for up to 40,000 hours. Interfacial layers developed at the SCN-YSZ and G6-YSZ interfaces, with microstructural evolution potentially affecting the devitrification resistance of silicate glasses.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Cory G. Parker, Ken A. Kane, Michael J. Lance, Caleb P. Massey, Andrew T. Nelson, Bruce A. Pint
Summary: Hydrothermal corrosion and steam exposures were performed on ultrasonic additively manufactured Zircaloy-4 (Zry-4) specimens to compare their performance with wrought Zry-4 under simulated pressurized water reactor (PWR) operation and accident conditions. The results showed that UAM Zry-4 specimens had a 50% higher mass gain in PWR conditions and a 50-80% higher mass gain in steam oxidation. Breakaway oxidation was observed in UAM Zry-4 specimens exposed to 900 degrees C steam.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
James R. Keiser, Preet M. Singh, Michael J. Lance, Harry M. Meyer, Kristian G. Myhre, Tracie M. Lowe, Dino Sulejmanovic, Ercan Cakmak, Victoria A. Cox, C. Shane Hawkins, Adam W. Willoughby
Summary: The increased demand for renewable energy resources has sparked a renewed interest in nuclear reactors, including a new generation of molten salt reactors. The handling of molten chloride or fluoride salts poses a challenge due to the inability of metals to form and retain a protective oxide surface layer. A specific alloy, Hastelloy N, was developed to address this issue, but it had some deficiencies. For the next generation of molten salt reactors, an alloy with higher temperature capability and pressure vessel code approval is required, leading some reactor designers to opt for 316H stainless steel. To minimize corrosion of the stainless steel by the molten fluoride salt, beryllium metal can be added to react with impurities and lower the oxidation potential. However, there are concerns about the potential reaction between beryllium and the stainless steel components.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
M. J. Lance, K. A. Kane, B. A. Pint
Summary: The application of NiCoCrAlY APS and HVOF bond coatings on alloy 247 disk substrates was investigated. It was found that APS flash coatings could significantly extend the coating lifetime and slow down the accumulation of damage in the thermally-grown alumina scale.
OXIDATION OF METALS
(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
Materials Science, Ceramics
Mackenzie Ridley, Kenneth Kane, Michael Lance, Cory Parker, Yi-Feng Su, Sanjay Sampath, Eugenio Garcia, Marshall Sweet, Molly O'Connor, Bruce Pint
Summary: This study compares the microstructure evolution and steam oxidation kinetics of Si-bond coatings beneath (Y/Yb)DS and YbDS/YbMS EBCs. The results show that the steam oxidation rate of (Y/Yb)DS EBC is reduced compared to YbDS/YbMS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Multidisciplinary Sciences
Tanner L. Cox, Michael J. Lance, Lindsey K. Albertson, Michelle A. Briggs, Adeline J. Dutton, Alexander V. Zale
Summary: Species assemblages of native and non-native fishes are common in freshwater systems worldwide, and the presence of non-native species may lead to negative impacts on native species through interspecific competition. In the Smith River watershed, rainbow trout were introduced by 1930, and since then, native mountain whitefish and non-native rainbow trout have likely coexisted. However, limited knowledge exists on their competition for food resources. This study quantified the diet compositions of rainbow trout and mountain whitefish in the Smith River and its tributary, Sheep Creek, revealing high diet overlap between the two species in the Smith River, indicating potential resource competition. Despite the overlap, some resource partitioning was observed, suggesting possible mechanisms for coexistence.
Article
Materials Science, Composites
Corson L. Cramer, Bola Yoon, Michael J. Lance, Ercan Cakmak, Quinn A. Campbell, David J. Mitchell
Summary: An additive manufacturing process based on the C/C-SiC system has been developed for fabricating ceramic matrix composites. Continuous carbon fibers were consolidated into a printed preform using automated fiber placement and polyether ether ketone matrix. Pyrolysis and reactive melt infiltration were employed to convert the polymer matrix to porous carbon and introduce silicon to form silicon carbide. The resulting C/C-SiC composites exhibited good mechanical properties, including high flexural strength, toughness, and porosity.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Engineering, Mechanical
Daekun Kim, Todd J. Toops, Ke Nguyen, Michael J. Lance, Jun Qu
Summary: The impact of a boron-containing lubricant oil additive (BR) on the performance of a Pd/Rh-based three-way catalyst (TWC) is investigated and compared with the effects of no additive (NA) and the industry standard zinc dialkyl-dithiophosphate (ZDDP). Accelerated aging of the catalysts using a genset shows that the BR-aged TWC exhibits similar reactivity to the NA-aged TWC, while the ZDDP-aged TWC shows increased reactivity for certain gas species. Analytical techniques reveal the presence of boron in the BR-aged TWC samples, but no boron-related peaks are observed in the XRD pattern.
Article
Nanoscience & Nanotechnology
Chanaka Kumara, Michael J. Lance, Jun Qu
Summary: This study presents the achievement of ultra-low coefficient of friction (COF) between steel surfaces by using a sacrificial coating composed of vertically-aligned carbon nanotubes (CNTs) under non-polar oil lubrication. The presence of graphene-containing tribofilms formed during running-in contributes to the superlubricity. The results demonstrate the feasibility and sustainability of achieving macroscale superlubricity in ambient environments.
MATERIALS TODAY NANO
(2023)
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)
