Abstract
Mechanical properties and microstructure of 3D-printed alumina processed using pressurized spray deposition have been compared to a commercial sintered alumina. The 3D-printed alumina microstructure was found to be bimodal in nature, with alumina particles agglomerated into large spheres, which resulted in 6.1% porosity. Compared to the sintered alumina, the 3D-printed material exhibited lower quasi-static and dynamic compressive strength, negligible differences in quasi-static and dynamic Vickers hardness, and negligible differences in quasi-static and dynamic fracture toughness. However, while the dynamic fracture surfaces of 3D-printed alumina were smooth and planar, large undulations were observed under quasi-static loading. It is concluded that the pressurized spray deposition 3D-printing technique is a promising method for processing alumina with properties comparable to that produced by traditional techniques, and further improvements may be gained by eliminating porosity.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3305-3316 |
| Number of pages | 12 |
| Journal | Journal of the European Ceramic Society |
| Volume | 38 |
| Issue number | 9 |
| DOIs | |
| State | Published - Aug 2018 |
| Externally published | Yes |
Keywords
- 3D-printed alumina
- Fracture toughness comparison
- Hardness
- Pressurized spray deposition
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry
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