Phase evolution during the melting and recrystallization of ceramic core in the (Bi,Pb)-2223 tape

Li, J.Y.; Soubeyroux, L.; Zheng, Haotian; Li, C.S.; Lu, Yafeng; Porcar, Laureline; Tournier, R.; Zhou, Lian

doi:10.1016/j.physc.2006.08.010

Cited by 2 publications

(2 citation statements)

References 9 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In spite of this success, this technique has not been used to prepare tapes or multifilament materials at an industrial scale because it was thought that any melting would decompose the Bi 2223 phase and a long period of annealing at a lower temperature would be necessary to recover this phase; long annealing and even a partial melting of chemical precursors have been used to obtain the Bi 2223 phase. Recently, experiments have again shown that this phase can be rapidly recomposed after melting, in agreement with the previous work on magnetic texturing [30,31]. All these results indicate the existence, above the liquidus temperature, of unmelted crystals acting as crystal growth nuclei.…”

Section: Bi 2223supporting

confidence: 89%

Texturing by cooling a metallic melt in a magnetic field

Tournier

Beaugnon

2009

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

Processing in a magnetic field leads to the texturing of materials along an easy-magnetization axis when a minimum anisotropy energy exists at the processing temperature; the magnetic field can be applied to a particle assembly embedded into a liquid, or to a solid at a high diffusion temperature close to the melting temperature or between the liquidus and the solidus temperatures in a region of partial melting. It has been shown in many experiments that texturing is easy to achieve in congruent and noncongruent compounds by applying the field above the melting temperature T m or above the liquidus temperature of alloys. Texturing from a melt is successful when the overheating temperature is just a few degrees above T m and fails when the processing time above T m is too long or when the overheating temperature is too high; these observations indicate the presence of unmelted crystals above T m with a size depending on these two variables that act as growth nuclei. A recent model that predicts the existence of unmelted crystals above the melting temperature is used to calculate their radius in a bismuth melt.

show abstract