Results 61 to 70 of about 173,298,982 (259)

High‐Temperature Phase Transformation in a V‐9Si‐6.5B Alloy: The Kinetic and Crystallographic Pathway From V5SiB2 to V8SiB4

Advanced Engineering Materials, EarlyView.
In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti, Andreas Stark, Roja Rani Korrayi, Florian Pyczak, Georg Hasemann   +4 more
wiley   +1 more source

Exploiting a high-performance magnesium-fluoride battery prototype enabled by anion-receptor-mediated electrolyte

Nature Communications
Rechargeable magnesium batteries have emerged as a competitive next-generation energy storage technology owing to their abundant resources and inherent safety. The development of Mg batteries, especially regarding specific energy, has been compromised by
Keyi Chen, Meng Lei, Tengfei Wang, Guyue Li, Chilin Li   +4 more
doaj   +1 more source

Effects of whisker surface modification on microstructures, mechanical and thermal properties of β-Si3N4 whiskers reinforced Al matrix composites

Materials & Design, 2018
In order to modify the interfacial bonding of β-Si3N4 whiskers (β-Si3N4w) reinforced Al matrix composites, the Ag-coated β-Si3N4w with varying Ag contents were incorporated into the Al matrix by a hot pressing method.
Chenxu Zhang, Dongxu Yao, Jinwei Yin, Kaihui Zuo, Yongfeng Xia, Hanqin Liang, Yu-Ping Zeng   +6 more
doaj   +1 more source

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Microstructure Analysis of Thermally Etched Alumina Ceramics [PDF]

, 2008
U radu je opisan postupak pripreme aluminij-oksidne (Al2O3) keramike visoko čiste, oblikovane hladnim izostatičkim prešanjem. Mikrostruktura pripravljene keramike analizirana je optičkim mikroskopom (OM), pretražnim elektronskim mikroskopom (SEM) te ...
Ćurković, L., Panjan, P., Fudurić Jelača, M., Lalić, M., Rede, V.   +4 more
core   +2 more sources

CaCu3Ti4O12 ceramics from co-precipitation method: Dielectric properties of pellets and thick films [PDF]

, 2009
Dielectric properties of CaCu3Ti4O12 (CCTO)-based ceramics and thick films (e ∼50m) prepared from powders synthesized by a soft chemistry method (co-precipitation) are presented and discussed.
Chartier, Thierry, Dutarde, E., Dutarde, Emmanuel, Rumeau, Axel, Lebey, Thierry, Guillemet-Fritsch, Sophie, Guillemet-Fritsch, S., Combettes, Céline, Rossignol, Fabrice, Barbier, Bertrand, Barbier, B.   +10 more
core   +1 more source

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source

Creation of Triple Hierarchical Micro-Meso-Macroporous N-doped Carbon Shells with Hollow Cores Toward the Electrocatalytic Oxygen Reduction Reaction

Nano-Micro Letters, 2017
A series of triple hierarchical micro-meso-macroporous N-doped carbon shells with hollow cores have been successfully prepared via etching N-doped hollow carbon spheres with CO2 at high temperatures.
Ruohao Xing, Tingsheng Zhou, Yao Zhou, Ruguang Ma, Qian Liu, Jun Luo, Jiacheng Wang   +6 more
doaj   +1 more source

Pyrolysis synthesis of Si-B-C-N ceramics and their thermal stability

, 2013
Si-B-C-N ceramics were synthesized by co-pyrolyzing hybrid polymeric precursors of polycarbosilane (PCS) and polyborazine (PBN). The pyrolysis behavior and structural evolution of the hybrid precursor, the microstructure and composition of the prepared ...
Zhang, Weigang, Luo, Lijie, Ge, Min
core   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source