Schön, Stefan ; Prielipp, Helge ; Janssen, Rolf ; Rödel, Jürgen ; Claussen, Nils (1994):
Effect of Microstructural Scale on Thermal Shock Resistance of Aluminum-Reinforced Alumina.
In: Journal of the American Ceramic Society, 77 (3), pp. 701-704. ISSN 0002-7820,
[Article]
Abstract
Thermal shock data are presented for two types of Al/Al2O3 composites (35 vol% Al) with different microstructural scale and compared to a monolithic alumina. The fine-scale Al/A12O3 material exhibits high room-temperature strength (765 MPa) and a gradual decrease in retained strength with increasing quenching temperature difference, δT, and improved thermal shock resistance—as compared to monolithic alumina—even at δT= 600°C. The coarse-scale Al/Al2O3 composite shows high long-crack fracture toughness (10.5 MPa·m1/2) and almost no strength degradation up to δT= 500°C. A qualitative picture for the effect of microstructural scale on thermal shock resistance emerges by employing a simple fracture mechanics description contrasting the crack driving force for transient stress fields with R-curve behavior.
| Item Type: | Article |
|---|---|
| Erschienen: | 1994 |
| Creators: | Schön, Stefan ; Prielipp, Helge ; Janssen, Rolf ; Rödel, Jürgen ; Claussen, Nils |
| Title: | Effect of Microstructural Scale on Thermal Shock Resistance of Aluminum-Reinforced Alumina |
| Language: | English |
| Abstract: | Thermal shock data are presented for two types of Al/Al2O3 composites (35 vol% Al) with different microstructural scale and compared to a monolithic alumina. The fine-scale Al/A12O3 material exhibits high room-temperature strength (765 MPa) and a gradual decrease in retained strength with increasing quenching temperature difference, δT, and improved thermal shock resistance—as compared to monolithic alumina—even at δT= 600°C. The coarse-scale Al/Al2O3 composite shows high long-crack fracture toughness (10.5 MPa·m1/2) and almost no strength degradation up to δT= 500°C. A qualitative picture for the effect of microstructural scale on thermal shock resistance emerges by employing a simple fracture mechanics description contrasting the crack driving force for transient stress fields with R-curve behavior. |
| Journal or Publication Title: | Journal of the American Ceramic Society |
| Volume of the journal: | 77 |
| Issue Number: | 3 |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 15 Jun 2012 08:49 |
| URL / URN: | http://dx.doi.org/10.1111/j.1151-2916.1994.tb05352.x |
| Identification Number: | doi:10.1111/j.1151-2916.1994.tb05352.x |
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