Results 201 to 210 of about 173,298,982 (259)

Improved Deformability of Co‐Free Medium Entropy Oxides by Controlled Entropy Destabilization

Advanced Science, EarlyView.
Controlled entropy destabilization activates defect‐mediated plasticity in Co‐free (CuMgNiZn)O by promoting pre‐existing Cu‐rich secondary phases that serve as defect sources. Temperature‐dependent dislocation activity evolves from limited motion at room temperature to extensive glide and stacking‐fault formation at 600 °C, enabling improved plasticity
Chang Liu, Ke Xu, Zhongxia Shang, Yang Chen, Debargha Paul, Yinghang Liu, Jeremy Gan, Shiyu Zhou, R. Edwin García, Xinghang Zhang, Haiyan Wang   +10 more
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Discrimination of Ceramics—Study on the Microstructures of Ceramics

Journal of Forensic Sciences, 1994
Abstract A method for discrimination of alumina ceramics was developed based on the observation of the surface morphology of etched surfaces, density, X-ray diffraction line profiles and grain size distributions. The experimental observations of the surface microstructure were made, using the scanning electron microscopy ...
T Hashimoto, S Deki, Y Kanaji
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Development of ceramic microstructures

Microsystem Technologies, 1995
For the production of microstructured ceramic parts, development efforts are necessary in the field of powder synthesis as well as in the area of shaping. Several processes have been developed. Powder synthesis was performed starting from metal organic precursors and using a two stage thermal process.
Ritzhaupt-Kleissl, H. J., Bauer, W., Günther, E., Laubersheimer, J., Hausselt, J.   +4 more
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Microstructure of Nanocrystalline Ceramics

MRS Proceedings, 1988
ABSTRACTThe microstructure of nanocrystalline (n-) TiO2 was studied as a function of sintering temperature up to 1273 K. Grain growth was monitored using x-ray diffraction and scanning electron microscopy. Measurements of density and permeability of He and Ar were also conducted.
H. Hahn, J. Logas, H. J. Höfler, Th. Bier, R. S. Averback   +4 more
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The Microstructure of Ceramic Whiskers

Proceedings, annual meeting, Electron Microscopy Society of America, 1991
The internal structure and surface crystallography of ceramic whiskers are of interest because of their increasing importance as second phase reinforcements in a variety of matrix materials. Whiskers are typically 0.5 to 5 um in diameter with aspect ratios of 10 to 100 or more.
L. F. Allard, T. A. Nolan
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Strength and Microstructure of Ceramics.

1987
Abstract : Results of a program on the toughness properties of monophase and two phase ceramics that toughen by bridging are presented. Fracture mechanics models describing this behavior, in the particular context of strength, are developed. Results of strengths tests confirming the essential predictions of the theory are presented.
Yiu-Wing Mai, Bernard J. Hockey, Carolyn J. Fairbanks, Peter L. Swanson, Brian R. Lawn   +4 more
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Ceramic microstructures and properties

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1985
Ceramic materials are currently being used in many applications, and it is expected that there are many new applications of ceramics in high-technology engineering systems, e.g., in microelectronics. However, many problems have to be overcome to improve the properties of the different ceramic components.
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Microstructure of Ceramic Materials

2013
The properties of ceramics depend on their microstructure, which is defined by the type, size, morphology, distribution, orientation and composition of the phases present and by the interface between the grains. In the latter case, a thick or thin layer of amorphous material may be found, originating from sintering additives. The variables involved can
Carlos P. Bergmann, Aisha Stumpf
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Studies on microstructure and microproperty of PLZT ceramics

Ferroelectrics, 1988
Abstract The microstructure of PLZT tranparent ferroelectric ceramics were studied by using the HREM techniques and electron diffraction study. The following experimental results were obtained: (1) The structure of micro-domains presented in the cubic α phase is exactly the same structure of its ferroelectric β phase after poling.
Z.W. Yin, X.T. Chen, X.Y. Song, J.W. Feng   +3 more
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Examples of evolution of microstructure in ceramics and composites

Microscopy Research and Technique, 1993
AbstractIn this article we describe a number of studies involving the direct observation of microstructural evolution. In general these investigations were carried out to establish the mechanistic paths involved. The materials studied range from fibers being evaluated for use in high‐temperature ceramic composites to energetic materials used as ...
P W, Brown, J R, Hellmann, M, Klimkiewicz   +2 more
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