Preferred orientation of BSCCO via centrifugal slip casting

Steinlage, Greg A.; Roeder, Ryan K.; Trumble, Kevin P.; Bowman, Keith J.; Li, Shi; McElfresh, M.

doi:10.1557/jmr.1994.0833

Cited by 14 publications

(2 citation statements)

References 11 publications

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“…Other compounds of interest are Bi-2223 (Bi 2 Sr 2 Ca 2 Cu 3 O x ) and Bi-2212 (Bi 2 Sr 2 CaCu 2 O x ). The plate-like crystal morphology makes these materials suitable for greenbody processing (Steinlage et al 1994). Plate-like crystals are preferentially oriented with [001] axes (normal to the plane of the plate) parallel to the compression direction (figure 19(b)) and preferred orientation develops largely by rigid body rotations.…”

Section: Zirconia (Zromentioning

confidence: 99%

Texture and anisotropy

2004

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A large number of polycrystalline materials, both manmade and natural, display preferred orientation of crystallites. Such alignment has a profound effect on anisotropy of physical properties. Preferred orientation or texture forms during growth or deformation and is modified during recrystallization or phase transformations and theories exist to predict its origin. Different methods are applied to characterize orientation patterns and determine the orientation distribution, most of them relying on diffraction. Conventionally x-ray polefigure goniometers are used. More recently single orientation measurements are performed with electron microscopes, both SEM and TEM. For special applications, particularly texture analysis at non-ambient conditions, neutron diffraction and synchrotron x-rays have distinct advantages. The review emphasizes such new possibilities.A second section surveys important texture types in a variety of materials with emphasis on technologically important systems and in rocks that contribute to anisotropy in the earth. In the former group are metals, structural ceramics and thin films. Seismic anisotropy is present in the crust (mainly due to phyllosilicate alignment), the upper mantle (olivine), the lower mantle (perovskite and magnesiowuestite) and the inner core (ε-iron) and due to alignment by plastic deformation. There is new interest in the texturing of biological materials such as bones and shells. Preferred orientation is not restricted to inorganic substances but is also present in polymers that are not discussed in this review.

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Section: Zirconia (Zromentioning

confidence: 99%

Texture and anisotropy

2004

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“…Although there are some other methods, such as slip casting [79,86,87], extrusion [88][89][90][91][92], tape casting [93][94][95][96][97][98], can also be used to form texture microstructures in ceramics, they are usually used as aids to other techniques and not aimed at texture formation. For example, slip casting is usually conducted in magnetic fields to orientate ceramic grains with magnetic anisotropy [81,[99][100][101][102][103][104][105][106][107][108][109][110], extrusion, and tape casting are usually used to align template grains for TGG [111][112][113][114].…”

Section: Preparation Of Textured Ceramicsmentioning

confidence: 99%

Preparation and anisotropic properties of textured structural ceramics: A review

et al. 2019

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Ceramics are usually composed of randomly oriented grains and intergranular phases, so their properties are the statistical average along each direction and show isotropy corresponding to the uniform microstructures. Some methods have been developed to achieve directional grain arrangement and preferred orientation growth during ceramic preparation, and then textured ceramics with anisotropic properties are obtained. Texture microstructures give particular properties to ceramics along specific directions, which can effectively expand their application fields. In this review, typical texturing techniques suitable for ceramic materials, such as hot working, magnetic alignment, and templated grain growth (TGG), are discussed. Several typical textured structural ceramics including α-Al 2 O 3 and related nacre bioinspired ceramics, Si 3 N 4 and SiAlON, h-BN, MB 2 matrix ultra-high temperature ceramics, MAX phases and their anisotropic properties are presented.

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Effects of Optimum Annealing Time on Superconducting Properties of Bi2?xPbxSr2Ca2Cu3Oy System

Khalil

2000

phys. stat. sol. (a)

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BSCCO superconducting ceramics of different compositions based on the system Bi 2± ±x Pb x Sr 2 Ca 2 Cu 3 O y (x 0.24, 0.26, and 0.28) were prepared by the conventional solid state reaction powder compacting method. BSCCO compounds have been subjected to atmosphere annealing treatments at 800 o C for different periods of time extended from 6 to 30 h. The effects of annealing time on the formed phases, critical transition temperature (T c o ) , microhardness (VHN) and surface microstructure of samples were investigated. The investigations proved that the most convenient time of annealing to obtain the highest peak intensity of the high-T c phase (2223), highest and sharpest transition T c o and maximum value of VHN is equal to 18 h. Prolongation of annealing time was associated with diminishing of all those parameters. This behaviour was attributed to the fact that this optimum annealing time (18 h) is characterized by the highest volume fraction of the (2223) phase formed in the compositions.

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Preferred orientation of BSCCO via centrifugal slip casting

Cited by 14 publications

References 11 publications

Texture and anisotropy

Texture and anisotropy

Preparation and anisotropic properties of textured structural ceramics: A review

Effects of Optimum Annealing Time on Superconducting Properties of Bi2?xPbxSr2Ca2Cu3Oy System

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