Abstract
The influence of CaO on the mechanical behaviour of translucent, MgO-doped Al2O3 ceramics has been investigated, using alumina both without and with added CaO. The addition of only 40 wt ppm CaO drastically changed the microstructure, resulting in an increase of optical transmission, which was the purpose of the addition. Strength (∼300 MPa) and fracture toughness (∼3.7 MPa m1/2), however, as measured at room temperature, decreased by 30% and 10%, respectively, while the resistance to slow crack growth increased slightly. Toughness as well as strength, showed a relative decrease with temperature of about 3×10-4 Ks-1. The results are discussed and compared with available literature data.
| Original language | English |
|---|---|
| Pages (from-to) | 2195-2202 |
| Number of pages | 8 |
| Journal | Journal of Materials Science |
| Volume | 19 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 1984 |
| Externally published | Yes |
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Fracture of translucent alumina : temperature dependence and influence of CaO dope. / de With, G.
In: Journal of Materials Science, Vol. 19, No. 7, 01.07.1984, p. 2195-2202.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Fracture of translucent alumina
T2 - temperature dependence and influence of CaO dope
AU - de With, G.
PY - 1984/7/1
Y1 - 1984/7/1
N2 - The influence of CaO on the mechanical behaviour of translucent, MgO-doped Al2O3 ceramics has been investigated, using alumina both without and with added CaO. The addition of only 40 wt ppm CaO drastically changed the microstructure, resulting in an increase of optical transmission, which was the purpose of the addition. Strength (∼300 MPa) and fracture toughness (∼3.7 MPa m1/2), however, as measured at room temperature, decreased by 30% and 10%, respectively, while the resistance to slow crack growth increased slightly. Toughness as well as strength, showed a relative decrease with temperature of about 3×10-4 Ks-1. The results are discussed and compared with available literature data.
AB - The influence of CaO on the mechanical behaviour of translucent, MgO-doped Al2O3 ceramics has been investigated, using alumina both without and with added CaO. The addition of only 40 wt ppm CaO drastically changed the microstructure, resulting in an increase of optical transmission, which was the purpose of the addition. Strength (∼300 MPa) and fracture toughness (∼3.7 MPa m1/2), however, as measured at room temperature, decreased by 30% and 10%, respectively, while the resistance to slow crack growth increased slightly. Toughness as well as strength, showed a relative decrease with temperature of about 3×10-4 Ks-1. The results are discussed and compared with available literature data.
UR - http://www.scopus.com/inward/record.url?scp=0021455805&partnerID=8YFLogxK
U2 - 10.1007/BF01058095
DO - 10.1007/BF01058095
M3 - Article
AN - SCOPUS:0021455805
VL - 19
SP - 2195
EP - 2202
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 7
ER -