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- W2013818974 abstract "We report the results of designed method of the recrystallization of Bi(2212,2223) and YBCO(123) HTSC ceramics, consisting of laser amorphization and short-time thermal annealing, which was used to enhance the structure and the transport properties of HTCS ceramics prepared by pressing. Cw CO<SUB>2</SUB> laser ((lambda) equals 10.6 micrometers ) with the average power 100 W was used as a laser source. Short- duration melting of high-T<SUB>c</SUB> superconducting ceramics by CO<SUB>2</SUB> laser, in combination with a short heat treatment, produced a denser fine-grained structure (grain size 2 - 3 micrometers ). The resultant structure contributed to a considerable increase in the critical current of the superconductors: in 1 - 2 orders of magnitude depending on a type of the material at 77 K and 2 - 3 orders at 20 K. Our results demonstrate the feasibility of laser amorphization of HTSC ceramics in an almost single-phase state with its chemical composition close the composition of the initial unmelted compound and with an almost unchanged area of the fused zone. Heat treatment of this amorphized zone restored the chemical composition to its initial ratio and made it possible to form grains of different types." @default.
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- W2013818974 date "1998-05-26" @default.
- W2013818974 modified "2023-10-17" @default.
- W2013818974 title "<title>Critical-current density enhancement in HTSC ceramics under CO<formula><inf><roman>2</roman></inf></formula> laser irradiation and short-time thermal annealing</title>" @default.
- W2013818974 doi "https://doi.org/10.1117/12.308621" @default.
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