Abstract
| Original language | English |
|---|---|
| Title of host publication | Superconducting ceramics |
| Editors | R. Freer |
| Place of Publication | Stoke-on-Trent |
| Publisher | The Institute of Ceramics |
| Pages | 249-256 |
| Publication status | Published - 1988 |
Publication series
| Name | British Ceramic Proceedings |
|---|---|
| Volume | 40 |
| ISSN (Print) | 0268-4373 |
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Microcracking and mechanical properties of YBa2Cu3Ox ceramics. / Severin, J.W.; With, de, G.
Superconducting ceramics. ed. / R. Freer. Stoke-on-Trent : The Institute of Ceramics, 1988. p. 249-256 (British Ceramic Proceedings; Vol. 40).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review
TY - GEN
T1 - Microcracking and mechanical properties of YBa2Cu3Ox ceramics
AU - Severin, J.W.
AU - With, de, G.
PY - 1988
Y1 - 1988
N2 - Elasticity, hardness and fracture data have been measured on superconducting YBa, Cu3 O~ ceramics with a relative density ranging from 87 to 93% and a grain size from about 10 to 2411m. For the 93% dense material a value of 112 GPafor the Young’s modulus and a hardness value of about 4.5 GPa are obtained. The strength andfracture toughness are dependent on cooling rate. A strength of 86 and 117 MPa are obtained for ‘fast’ and ‘slow’ cooling rates respectively. The corresponding fracture toughness measurements yielded 1•2 and 1•4 MPa. m1. The fracture toughness can be sign~cantly lower, as observed on some specimens, probably by reaction with water at the grain boundaries. Extensive microcracking, in agreement with theoretical expectations, was observed by microscopy. Further evidence from mercury intrusion porosimetry and N, adsorption analysis is presented. Possible consequences are discussed.
AB - Elasticity, hardness and fracture data have been measured on superconducting YBa, Cu3 O~ ceramics with a relative density ranging from 87 to 93% and a grain size from about 10 to 2411m. For the 93% dense material a value of 112 GPafor the Young’s modulus and a hardness value of about 4.5 GPa are obtained. The strength andfracture toughness are dependent on cooling rate. A strength of 86 and 117 MPa are obtained for ‘fast’ and ‘slow’ cooling rates respectively. The corresponding fracture toughness measurements yielded 1•2 and 1•4 MPa. m1. The fracture toughness can be sign~cantly lower, as observed on some specimens, probably by reaction with water at the grain boundaries. Extensive microcracking, in agreement with theoretical expectations, was observed by microscopy. Further evidence from mercury intrusion porosimetry and N, adsorption analysis is presented. Possible consequences are discussed.
M3 - Conference contribution
T3 - British Ceramic Proceedings
SP - 249
EP - 256
BT - Superconducting ceramics
A2 - Freer, R.
PB - The Institute of Ceramics
CY - Stoke-on-Trent
ER -