Results 271 to 280 of about 20,982 (319)
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Microstructure and the Strength of Ceramics
1986Microstructural influences on ceramic strength become significant at small flaw sizes. These influences are readily quantified by strength testing with controlled indentation flaws. Data are presented here for alumina and glassy-ceramic specimens broken under both inert and fatigue conditions.
C. J. Fairbanks +3 more
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Ceramic/Metal Reactions and Microstructures in Ceramic Joints
1998Ceramics and in particular combinations of ceramics and metals appear to offer many technical and economic advantages to design engineers, permitting products to be made with better wear resistance, higher service temperatures and so on, but if these aspirations are to be met it is usually necessary for the ceramic and the metal to form high integrity ...
Stathis D. Peteves +3 more
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Piezoresponse and microstructure of BaTaO2N ceramics
Journal of the European Ceramic Society, 2018Abstract Piezoresponse force microscopy was conducted on a polished slice of the perovskite oxynitride ceramic BaTaO2N after ammonolysis at a bias voltage of ± 10 V. The ceramic surface was relatively porous because it was readily hydrolyzed by ambient humidity.
Akira Hosono +4 more
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The Microstructure of Nitrogen Ceramics
1983Since the nitrogen ceramics meeting(1) held in 1976, our knowledge and understanding of the role of the microstructure of this class of material has expanded and matured. At that time knowledge was scanty and restricted mainly to Si3N4 hot pressed with MgO; it had been established that the material consisted principally of grains of β-Si3N4 with ...
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Microstructural design of PZT ceramics
Journal of the European Ceramic Society, 2005Abstract PZT ceramics, Pb(Zr1−xTix)O3, are good dielectrics and piezoelectric materials. These properties reach a maximum in the morphotropic phase boundary (MPB), where phase coexistence occurs. The width of this coexistence region was found to be dependent on the size of the ferroelectric domain, through the size of the grains, within the relation ...
J.A. Pérez +3 more
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Microstructure and Mechanical Properties of Metal-to-Ceramic and Ceramic-to-Ceramic Joints
1981Solid state ceramic-ceramic or ceramic-metal bonding is a joining method which promises bond properties equivalent to those of the bulk material, both at ambient and elevated temperatures1. Microstructural features at the interface such as cracks, unbonded areas and intermediate reactions layers, however, can strongly influence the mechanical ...
Gerhard Elssner +2 more
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Etching and microstructure of engineering ceramics
Materials Characterization, 1995Engineering ceramics are often difficult to prepare metallographically because of their hardness, wear resistance and chemical inertness. Two silicon carbides, a silicon nitride and a sialon, are prepared and etched using several different techniques. The most efficient methods are identified. © 1995.
Simon G. Cook +2 more
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Manufacturing of isolated ceramic microstructures
Microsystem Technologies, 2002The design of a micromold for gearwheels and components for a gearwheel micropump were adapted for the fabrication by micro powder injection molding (micro-PIM). Several variations were made to compensate the shrinkage during sintering and to meet the dimensions of the micro features.
Gietzelt, T. +3 more
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Microstructure and Deterioration in Steatite Ceramics
Journal of the American Ceramic Society, 1983Pitting in steatite ceramics was found to occur as a result of (1) deterioration with time, the familiar aging phenomenon, and (2) secondary recrystallization, which takes place immediately after fabrication. Differences in microstructural and other features observed in the two cases are pointed out.
Prasanta Nandi, Vemuri C. S. Prasad
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