TY - JOUR
T1 - Microstructure formation process of Y123 film fabricated by advanced TFA-MOD process
AU - Mori, Nobuyuki
AU - Tanaka, Takayuki
AU - Minei, Taichi
AU - Yamada, Kazuhiro
AU - Mukaida, Masasi
N1 - Funding Information:
Manuscript received September 1, 2006. This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications. N. Mori, T. Tanaka, K. Yamada, and M. Mukaida are with Kyushu University, Fukuoka 819-0395, Japan (e-mail: [email protected]; [email protected]; [email protected]). T. Minei was with Kyushu University, Fukuoka 819-0395, Japan. He is now with Toyota Motor Co., Ltd., Toyoda, Japan. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2007.899126 Fig. 1. TEM image of cross-section of YBCO film quenched during firing process (1023 K, 40 min)(a), and selected area diffraction patterns from film (b) (d).
PY - 2007/6
Y1 - 2007/6
N2 - In order to clarify the growth process of the Y123 film on LAO or CeO 2/LAO in the modified TFA-MOD process using precursor solution of TFA salts for Y and Ba and F-free salt for Cu, two methods were introduced. The quenching method revealed the growth process of Y123 crystals during the process by observing the microstructures of the quenched film by TEM. Also the in-situ observation of the sample-surface revealed the generation of liquid and/or gas in YBCO film during the process, and pores were considered to form by the gas passed through the liquid phase. A growth model for Y123 crystals in YBCO film with some process-controlling parameters was obtained on the basis of the above observed results. The growth processes of faceted Y123 crystals with various crystal orientations were simulated by two-dimensional numerical method using c-axis and a-axis growth rate functions.
AB - In order to clarify the growth process of the Y123 film on LAO or CeO 2/LAO in the modified TFA-MOD process using precursor solution of TFA salts for Y and Ba and F-free salt for Cu, two methods were introduced. The quenching method revealed the growth process of Y123 crystals during the process by observing the microstructures of the quenched film by TEM. Also the in-situ observation of the sample-surface revealed the generation of liquid and/or gas in YBCO film during the process, and pores were considered to form by the gas passed through the liquid phase. A growth model for Y123 crystals in YBCO film with some process-controlling parameters was obtained on the basis of the above observed results. The growth processes of faceted Y123 crystals with various crystal orientations were simulated by two-dimensional numerical method using c-axis and a-axis growth rate functions.
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U2 - 10.1109/TASC.2007.899126
DO - 10.1109/TASC.2007.899126
M3 - Article
AN - SCOPUS:34547462507
SN - 1051-8223
VL - 17
SP - 3290
EP - 3293
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -