Grain alignment in bulk YBa[sub 2]Cu[sub 3]O[sub x] superconductors by isothermal peritectic reaction process

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

OSTI ID:5841879

Lee, Y A; Kang, S L ^[1]; Suh, Jeonghun; Yoon, Duk Yong ^[2]

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1. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Ceramic Science and Engineering
2. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Materials Science and Engineering

An isothermal peritectic reaction (IPR) process has been developed to fabricate YBa[sub 2]Cu[sub 3]O[sub x] (123) superconductors with aligned grain structure in a relatively short time without a temperature gradient. The process consists of the preparation of Y[sub 2]BaCuO[sub 5] (211) powder compact in wire form and infiltration of a Ba-Cu-O glass melt into the 211 compact below the peritectic temperature of [approximately]1010 C. During the infiltration at 965 C the 123 phase forms at the surface of the compact by the reaction between 211 grains and the glass, and the newly formed 123 grains grow directionally towards the center of the compact. The result of the infiltration is an aligned grain structure with a preferred orientation of [100] planes in the axial direction of wire-type compacts. These 123 superconductor specimens show the zero resistance (t[sub c]) at 92 K and transport critical current density (J[sub c]) of up to 1500 A/cm[sup 2]. By this process, super-conductor wires can be produced at shorter times and lower temperatures than the melt-texturing methods.

• OSTI ID: 5841879
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 76:10; ISSN 0002-7820
• Country of Publication: United States
• Language: English

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