NDLI: Fabrication of large grain Nd-Ba-Cu-O by self-seeded melt growth

Content Provider	IEEE Xplore Digital Library
Author	Cardwell, D.A. Kambara, M. Hari Babu, N. Smith, P.J. Shi, Y.
Copyright Year	2002
Abstract	Large, single grain Nd-Ba-Cu-O (NdBCO) samples containing Nd-422 phase inclusions have been fabricated successfully using NdBCO self-seeds by two melt processing techniques under reduced oxygen partial pressure. The first technique involves hot seeding where the seed crystal is placed onto the sample surface at the peritectic temperature. The second method involves doping precursor powder with Au and Ag to reduce the peritectic decomposition temperature of the material. This enables seeding to be achieved by introducing an undoped Nd-123 seed to the sample surface at room temperature, which simplifies processing significantly. This paper compares the microstructure of large grain NdBCO samples fabricated by the two techniques including the dependence of growth rate on undercooling, processing atmosphere and the size and distribution of Nd-422 in the Nd-123 phase matrix.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3712
Ending Page	3715
Page Count	4
File Size	484657
File Format	PDF
ISSN	10518223
Volume Number	11
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fabrication Powders Superconductivity Telephony Gold Superconducting materials Crystalline materials Atmosphere High temperature superconductors Melt processing
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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