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Mechanical strength of hot-pressed Bi—Pb—Sr—Ca—Cu—O superconductor

Published online by Cambridge University Press:  29 June 2016

Norimitsu Murayama ,
Yasuharu Kodama ,
Shuji Sakaguchi  and
Fumihiro Wakai
Norimitsu Murayama
Affiliation:
Government Industrial Research Institute, Nagoya 1-1 Hirate-cho, Kita-ku, Nagoya 462, Japan
Yasuharu Kodama
Affiliation:
Government Industrial Research Institute, Nagoya 1-1 Hirate-cho, Kita-ku, Nagoya 462, Japan
Shuji Sakaguchi
Affiliation:
Government Industrial Research Institute, Nagoya 1-1 Hirate-cho, Kita-ku, Nagoya 462, Japan
Fumihiro Wakai
Affiliation:
Government Industrial Research Institute, Nagoya 1-1 Hirate-cho, Kita-ku, Nagoya 462, Japan
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Abstract

Bi1.84Pb0.34Sr2.03Ca1.9Cu3.06Oy, bulk superconductors were prepared by hot press sintering at 800°C at a pressure range from 50 kgf/cm2 to 200 kgf/cm2 in air for 2 h. The relative density increased with increasing the hot-pressing pressure, and specimens with various relative densities of 70%–90% were prepared. The flexural strength (σ) at room temperature was related to the porosity (p) as follows: σ = 138 exp(−2.83 p) (MPa). The flexural strengths of the specimen with p = 0.1 were 103 MPa and 113 MPa at room temperature and at 83 K, respectively. The flexural strength tended to increase with decreasing temperature. Anisotropy in flexural strength was observed, which seemed to be due to the grain-oriented microstructure.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 1 , January 1992 , pp. 34 - 37
Copyright
Copyright © Materials Research Society 1992

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References

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