Results 51 to 60 of about 85,615 (303)

Densification mechanism of the ultra-fast sintering dense alumina

AIP Advances, 2020
Almost fully dense pure alumina could be prepared by fast firing (FF) at a high temperature (greater than 1689 °C) and a high heating rate (∼350 °C/s) with a whole sintering cycle in approximately 2 min without pressure.
Dangqiang Wang, Xinzhi Wang, Chongjun Xu, Zhengyi Fu, Jinyong Zhang   +4 more
doaj   +1 more source

Ionic and Electronic Conductivity of Nanostructured, Samaria-Doped Ceria [PDF]

, 2012
The ionic and electronic conductivities of samaria doped ceria electrolytes, Ce_(0.85)Sm_(0.15)O_(1.925−δ), with nanometric grain size have been evaluated.
Chueh, W. C., Haile, S. M., Jung, W., Muccillo, E. N. S., Souza, E. C. C.   +4 more
core   +1 more source

Interactions between Molten High‐Silicon Electrical Steels and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
This study examines how several molten high‐silicon electrical steels interact with both conventional and recycled MgO–C refractories. For this, various immersion experiments are conducted. In addition to infiltration, a number of mechanisms are identified and explained that control the corrosion of the refractory material.
Lukas Neubert, Matheus Roberto Bellé, Anton Yehorov, Anhelina Mospan, Till M. J. Stadtmüller, Seetharaman Sridhar, Christos G. Aneziris, Olena Volkova   +7 more
wiley   +1 more source

Rapid densification of nanocrystalline zirconia: Pressureless versus pressure-assisted spark plasma sintering

Open Ceramics
Spark plasma sintering (SPS) is the most straightforward way to rapidly sinter nanoceramics, but the applied pressure prevents sintering of additively manufactured ceramics. Therefore, fast firing techniques such as “pressureless” SPS and ultra-fast high-
Andraž Kocjan, Nikhil Bhootpur, Aljaž Iveković, Mirva Eriksson   +3 more
doaj   +1 more source

Elinvar Materials: Recent Progress and Challenges

Advanced Engineering Materials, EarlyView.
Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley   +1 more source

Influence of Dwell Time and Pressure on SPS Process with Titanium Aluminides

Metals, 2022
Spark plasma sintering (SPS) or the field-assisted sintering technique (FAST) is commonly used to process powders that are difficult to consolidate, more efficiently than in the conventional powder metallurgy process route.
Bernd-Arno Behrens, Kai Brunotte, Julius Peddinghaus, Adrian Heymann   +3 more
doaj   +1 more source

Plasticity of nanocrystalline zirconia ceramics and composites [PDF]

, 1997
The deformation strain rate of nanocrystalline Y-TZP shows an increase by a factor 4 if the grain size decreases from 200 to 100 nm. Real superplastic deformation (strain rate > 10−4 s−1) is observed in these materials at relative low temperature (1100 ...
Boutz, M.M.R., Burggraaf, A.J., He, Y.J., Verweij, H., Winnubst, A.J.A.   +4 more
core   +3 more sources

Packaging of Macroscopic Material Payloads: Needs, Challenges, Concepts, and Future Directions

Advanced Engineering Materials, EarlyView.
This review introduces a unified framework that decomposes any macroscopic packaging system into the payload, packaging material, and packaging strategy and combines them into a conceptual packaging equation: packaging strategy = payload + packaging material.
Venkata S. R. Jampani, Manos Anyfantakis
wiley   +1 more source

Phase Transition and Mechanical Property Modulation of Silicon Nitride at High Temperature and High Pressure

Gaoya wuli xuebao
Silicon nitride (Si3N4) ceramics are a novel category of structural ceramics, exhibiting both high reliability and economy value due to their unique physical and chemical properties.
Siwen CUI, Shixin LI, Shuailing MA, Min LIAN, Xingbin ZHAO, Qiang TAO, Pinwen ZHU   +6 more
doaj   +1 more source

A Thermodynamic 3D Model for the Simulation of Diffusion‐Controlled Alloying Processes in Heterogeneous Material Structures

Advanced Engineering Materials, EarlyView.
A numerical model resulting from irreversible thermodynamics for describing transport processes is introduced, focusing on thermodynamic activity gradients as the actual driving force for diffusion. Implemented in CUDA C++ and using CalPhaD methods for determining the necessary activity data, the model accurately simulates interdiffusion in aluminum ...
Ulrich Holländer, Leonhard Holländer, André Langohr, Hans Jürgen Maier   +3 more
wiley   +1 more source