Abstract
Microstructural studies were performed at the joining area between two blocks of Y-Ba-Cu-O bulk superconductors using sintered ErBa2Cu3Oy (Er123) welding solder when the joined surfaces were parallel to the (1 0 0) and (1 1 0) crystallographic planes. The residual liquid phase and the segregation of second phase particles were always observed in the joint with (1 0 0)/(1 0 0) surfaces, while no such defects were observed in the joint with (1 1 0)/(1 1 0) surfaces. Microstructural observations of the joint at several stages of the joining process showed that the growth front was always parallel to the (1 0 0) joined surfaces for the (1 0 0)/(1 0 0) joint, leading to the segregation of liquid phase and second phase particles. In contrast, many triangular crystals were observed at the (1 1 0)/(1 1 0) joint in that the (1 0 0) facet was tilted about 45° from the (1 1 0) joined surfaces, and thus allowing the complete reaction of the Er123 phase at the joint. Such growth morphology was the source of joint free from residual liquid phase and segregation of second phase that reduce the critical current in the (1 1 0)/(1 1 0) joint.
| Original language | English |
|---|---|
| Pages (from-to) | 641-645 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 378-381 |
| Issue number | PART 1 |
| DOIs | |
| Publication status | Published - 2002 Oct 1 |
| Externally published | Yes |
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Keywords
- 〈110〉/〈110〉 joint
- Er123
- Joining
- Sintered plate
- Y123 bulk
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Effect of the surface orientation on the microstructure of bulk Y-Ba-Cu-O joint. / Yoshioka, J.; Iida, K.; Sakai, Naomichi; Murakami, Masato.
In: Physica C: Superconductivity and its Applications, Vol. 378-381, No. PART 1, 01.10.2002, p. 641-645.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of the surface orientation on the microstructure of bulk Y-Ba-Cu-O joint
AU - Yoshioka, J.
AU - Iida, K.
AU - Sakai, Naomichi
AU - Murakami, Masato
PY - 2002/10/1
Y1 - 2002/10/1
N2 - Microstructural studies were performed at the joining area between two blocks of Y-Ba-Cu-O bulk superconductors using sintered ErBa2Cu3Oy (Er123) welding solder when the joined surfaces were parallel to the (1 0 0) and (1 1 0) crystallographic planes. The residual liquid phase and the segregation of second phase particles were always observed in the joint with (1 0 0)/(1 0 0) surfaces, while no such defects were observed in the joint with (1 1 0)/(1 1 0) surfaces. Microstructural observations of the joint at several stages of the joining process showed that the growth front was always parallel to the (1 0 0) joined surfaces for the (1 0 0)/(1 0 0) joint, leading to the segregation of liquid phase and second phase particles. In contrast, many triangular crystals were observed at the (1 1 0)/(1 1 0) joint in that the (1 0 0) facet was tilted about 45° from the (1 1 0) joined surfaces, and thus allowing the complete reaction of the Er123 phase at the joint. Such growth morphology was the source of joint free from residual liquid phase and segregation of second phase that reduce the critical current in the (1 1 0)/(1 1 0) joint.
AB - Microstructural studies were performed at the joining area between two blocks of Y-Ba-Cu-O bulk superconductors using sintered ErBa2Cu3Oy (Er123) welding solder when the joined surfaces were parallel to the (1 0 0) and (1 1 0) crystallographic planes. The residual liquid phase and the segregation of second phase particles were always observed in the joint with (1 0 0)/(1 0 0) surfaces, while no such defects were observed in the joint with (1 1 0)/(1 1 0) surfaces. Microstructural observations of the joint at several stages of the joining process showed that the growth front was always parallel to the (1 0 0) joined surfaces for the (1 0 0)/(1 0 0) joint, leading to the segregation of liquid phase and second phase particles. In contrast, many triangular crystals were observed at the (1 1 0)/(1 1 0) joint in that the (1 0 0) facet was tilted about 45° from the (1 1 0) joined surfaces, and thus allowing the complete reaction of the Er123 phase at the joint. Such growth morphology was the source of joint free from residual liquid phase and segregation of second phase that reduce the critical current in the (1 1 0)/(1 1 0) joint.
KW - 〈110〉/〈110〉 joint
KW - Er123
KW - Joining
KW - Sintered plate
KW - Y123 bulk
UR - http://www.scopus.com/inward/record.url?scp=0036785713&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036785713&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(02)01512-5
DO - 10.1016/S0921-4534(02)01512-5
M3 - Article
AN - SCOPUS:0036785713
VL - 378-381
SP - 641
EP - 645
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -