Results 71 to 80 of about 2,113 (176)

Depositional and stratigraphic evolution of a Permian megalake system: Implications for seiche‐influenced models

The Depositional Record, Volume 12, Issue 2, April 2026.
During the Late Permian, the rise of the Gondwanides Belt trapped marine waters, giving birth to a vast megalake. This lake shifted between overfilled, balanced‐fill and underfilled stages that are recorded by high‐frequency accommodation changes, while meteorological seiches shaped the sedimentary dynamic and produced heterolithic beds.
B. Christofoletti, L. V. Warren, F. G. Varejão, M. G. Rodrigues, M. G. Simões, D. V. Palcu, M. L. Assine   +6 more
wiley   +1 more source

High cycle fatigue behavior of selective laser melting TC4 alloy

Cailiao gongcheng
An experimental study on high cycle fatigue behavior of selective laser melting (SLM) TC4 alloy was carried out. The fatigue properties of the alloy under two sampling directions (horizontal and vertical) and two temperatures (room temperature and 400 ℃)
WU Liangliang, XU Ruida, JIAO Zehui, YU Huichen   +3 more
doaj   +1 more source

Hot Isostatic Pressing of Beryllium Oxide

Journal of the Ceramic Association, Japan, 1973
高圧ガス圧縮装置を用いて, 温度1000°-1400℃, 圧力2kbarの条件下で酸化ベリリウムの静水圧焼結を行なった. この種の実験では, 従来, 圧力媒体として, 高融点金属が用いられてきたが, 著者らは, その代りにガラスを使用することにより, 非常に良好な結果を得た.本実験において, その緻密化は, 塑性流動によって非常に速く進行するという結論が得られた. これらの焼結体は低い温度で, しかも比較的短時間内に, すべて理論密度の値に達しており, 粒子の異常成長は全く認められなかった. これらのことから, ガラスを圧力媒体とする静水圧焼結は, 均一な微粒子から成る緻密な焼結体が得られるものと結論できる.
Kohei KODAIRA, Masahiko SHIMADA, Shoichi KUME, Toru MATSUSHITA, Mitsue KOIZUMI   +4 more
openaire   +2 more sources

Mechanical and Dielectric Properties of Porous Slip Cast Silicon Nitride: Yttrium Oxide‐Aluminum Oxide Sintering Aids

International Journal of Applied Ceramic Technology, Volume 23, Issue 2, April 2026.
Silicon nitride samples were slip cast using yttrium oxide‐aluminum sintering aids to fabricate porous materials for radar frequency windows. Microstructure and phase composition were determined. Flexural strength, elastic modulus, dielectric constant, and loss tangent were collected from room temperature to elevated temperatures up to 1200°C.
Averyonna R. Kimery, Matthew A. Thompson, Keith S. Caruso, Collin C. McClain, Carlos J. Martinez, Rodney W. Trice   +5 more
wiley   +1 more source

Tuning the Phase Structure and Electrical Properties of BNKT‐Based Ceramics via Li+ Doping

Advanced Materials Interfaces, Volume 13, Issue 6, 16 March 2026.
Li+‐doped Bi0.5[Na0.84‐xK0.16Lix]0.5TiO3 lead‐free piezoelectric ceramics are fabricated. The optimized composition delivers a high piezoelectric coefficient d33 and elevated depolarization temperature Td. It also shows large electrostrain and high Curie temperature, greatly extending the working temperature range for BNT‐based piezoelectric ...
Guangzhi Dong, Luyao Wang, Bilin Zhang, Ning Yang, Yifan Zhang, Xinyang Guo, Shilong Wang, Rusen Yang, Huiqing Fan, Haitao Huang   +9 more
wiley   +1 more source

Design of a Cobalt‐Free Maraging Steel with Ultra‐High Strength of 2.3 GPa Through Additive Manufacturing

Advanced Science, Volume 13, Issue 16, 18 March 2026.
A computationally designed, cobalt‐free maraging steel tailored for additive manufacturing achieves an ultra‐high tensile strength of 2.3 GPa with 5.7% elongation. This exceptional strength‐ductility synergy stems from high‐density core‐shell Ni3Ti/NiAl nanoprecipitates, a crack‐resistant composition, and a fine equiaxed grain structure enabled by ...
Hu Li, Shubo Gao, Liming Tan, Weiming Ji, Liuliu Han, Kun Zhou, Yong Liu   +6 more
wiley   +1 more source

Geochemical Analysis of Diachronous V‐Shaped Ridges and Troughs That Flank the Reykjanes Ridge South of Iceland

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract It is recognized that mantle plumes play a direct role in generating regional uplift and producing immense volumes of basaltic magmatism, both of which can influence paleoclimate. The Icelandic Plume, beneath the North Atlantic Ocean, is of particular importance due to its size and position at a significant paleoceanographic gateway.
Nicky White, Chia‐Yu Tien, Callum Pearman, John Maclennan, Bramley Murton, Expedition 395 Scientists   +5 more
wiley   +1 more source

Performance Enhancement of Ca3Co4O9‐based Transverse Multilayer Thermoelectric Generators for Low‐Power Applications

Journal of the American Ceramic Society, Volume 109, Issue 3, March 2026.
Transverse multilayer thermoelectric generators (TMLTEGs) were fabricated using Ca3Co4O9 and Ag. Optimum geometry of the TMLTEGs was determined by numerical calculations and simulation. Power output is enhanced by 80% through layer thickness optimization.
Ahmed A. S. Ibrahim, Arne Bochmann, Romy Löhnert, Björn Mieller, Lutz Wilde, Beate Capraro, Michael Stelter, Jörg Töpfer   +7 more
wiley   +1 more source

Thermodynamics of Interfaces for Sustainable Ceramics

Journal of the American Ceramic Society, Volume 109, Issue 3, March 2026.
ABSTRACT This paper explores the thermodynamics of interfaces in sustainable ceramics, emphasizing the crucial role of thermodynamic principles in predicting the properties and processing of ceramic materials. Concerning the concept of “exergy,” which quantifies the minimum work required for ceramic fabrication, it emphasizes the necessity of ...
Douglas Gouvêa
wiley   +1 more source

Processing and properties of calcium phosphates bioceramics by hot isostatic pressing

MATEC Web of Conferences, 2013
Stoichiometric β-tricalcium phosphate (β-TCP), hydroxyapatite (HA) and biphasic calcium phosphate (TCP/HA 60/40 %wt, BCP40) powders were synthesized by chemical precipitation of aqueous solutions of diammonium phosphate and calcium nitrate.
Boilet Laurent, Lardot Véronique, Tricoteaux Arnaud, Leriche Anne, Cambier Francis, Descamps Michel   +5 more
doaj   +1 more source