Variables affecting the fabrication of single grain YBa2Cu3O7-y superconductors by the top-seeded melt growth process

In this article, we summarize the variables affecting the fabrication of a single grain YBCO superconductor by a top-seeded melt-growth- (TSMG-) process. The important variables are the seed melting and the resolidification which lead to the formation of undesirable subsidiary Y123 grains at the seeded area, and nucleation at both the compact/substrate interfaces and compact surfaces. The undesirable Y123 nucleation acts as the main obstacles for the fabrication of the single grain Y123 superconductor because of its competitive growth with the Y123 grain grown from the seed. The methods of suppressing the formation of the subsidiary Y123 nucleation, and of shortening the entire processing time of the TSMG process were suggested.

[1]  N. Sakai,et al.  Melt-processed light rare earth element - Ba - Cu - O , 1996 .

[2]  D. Schläfer,et al.  Multi-seeded melt crystallization of YBCO bulk material for cryogenic applications , 1999 .

[3]  M. Murakami,et al.  Large Levitation Force due to Flux Pinning in YBaCuO Superconductors Fabricated by Melt-Powder-Melt-Growth Process , 1990 .

[4]  D. Shi,et al.  Surface nucleation, domain growth mechanisms, and factors dominating superconducting properties in seeded melt grown YBa_2Cu_3O_x , 1997 .

[5]  Y. Shiohara,et al.  The relation between the undercooling and the growth rate of YBa_2Cu_3O_6+x superconductive oxide , 1996 .

[6]  T. Sung,et al.  Control of YBCO growth at the compact/substrate interface by bottom seeding and Yb2O3 coating in seeded melt-growth processed YBCO oxides using a MgO substrate , 1999 .

[7]  Y. Sun,et al.  Growth and possible size limitation of quality single-grain YBa2Cu3O7 , 1994 .

[8]  Y. Shiohara,et al.  Solubility of RE elements into Ba−Cu−O melts and the enthalpy of dissolution , 1994 .

[9]  D. Shi,et al.  Domain-orientation dependence of levitation force in seeded melt grown single-domain YBa2Cu3Ox , 1997 .

[10]  T. Sung,et al.  Dissolution of seed crystals during top-seeded melt growth of , 1998 .

[11]  M. Murakami,et al.  Optimization of Y_2BaCuO_5 phase morphology for the growth of large bulk YBCO grains , 1995 .

[12]  T. Sung,et al.  Control of the growth rate of YBa2Cu3Ox single-domained crystal by applying two-step undercooling in top-seeded melt growth , 1998 .

[13]  S. Marinel,et al.  Top-seeding melt texture growth of single-domain superconducting pellets , 1997 .

[14]  T. Sung,et al.  Effect of resolidification nature of SmBa2Cu3O7−y seeds on the growth mode of YBa2Cu3O7−y , 1999 .

[15]  H. Moon,et al.  Metal oxide (MeO=CdO, CeO2, Cr2O3, Nd2O3, Sb2O3, UO2 and ZrO2) addition in YBaCuO prepared by partial melt processing , 1992 .

[16]  P. McGinn,et al.  Effects of processing parameters on the levitation force of melt-processed YBa 2 Cu 3 O x , 1995 .

[17]  G. Hong,et al.  New method of producing fine Y2BaCuO5 in the melt-textured Y-Ba-Cu-O system: attrition milling of YBa2Cu3Oy-Y2BaCuO5 powder and CeO2 addition prior to melting , 1995 .

[18]  C. Dewhurst,et al.  Fabrication of large grain YBCO by seeded peritectic solidification , 1996 .

[19]  T. Komatsu,et al.  On the New Substrate Materials for High-Tc Superconducting Ba-Y-Cu-O Thin Films , 1988 .

[20]  T. Komatsu,et al.  On the Reactions of Quenched BaYCuO Powders with Various Materials , 1988 .

[21]  E. Ruckenstein,et al.  Interactions of the YBaCuO superconductor with various oxide and metallic substrates , 1988 .

[22]  J. Hull,et al.  GROWTH OF LARGE-DOMAIN YBA2CU3OX WITH NEW SEEDING CRYSTALS OF CANDALO4 AND SRLAGAO4 , 1995 .

[23]  C. Dewhurst,et al.  The influence of process parameters on the growth morphology of large-grain Pt-doped YBCO fabricated by seeded peritectic solidification , 1997 .

[24]  C. Varanasi,et al.  Seeded melt texture growth processing of with coatings , 1997 .

[25]  Tae Hyun Sung,et al.  Top-seeded melt growth of Y-Ba-Cu-O superconductor with multiseeding , 2000 .

[26]  G. Hong,et al.  (001) MgO single crystal as a reaction-barrier material for melt processing of Y-Ba-Cu-O superconductor , 1994 .

[27]  M. Morita,et al.  High Magnetic Flux Trapping by Melt-Grown YBaCuO Superconductors , 1991 .

[28]  M. Murakami,et al.  Fracture Toughness of YBaCuO Prepared by MPMG Process , 1990 .

[29]  R. Tournier,et al.  In-situ YBa2Cu3Ox growth rate analysis , 1997 .

[30]  H. S. Chauhan,et al.  RELATIONSHIP BETWEEN GROWTH RATE AND UNDERCOOLING IN PT-ADDED Y1BA2CU3O7-X , 1996 .