Abstract
Metal/ceramic composites with lamellar microstructures are a novel class of metal-matrix composites produced by infiltration of freeze-cast or ice-templated ceramic preforms with molten aluminium alloy. The cost-effectiveness of production and relatively high ceramic content make such composites attractive to a number of potential applications in the automotive, aerospace and biomedical engineering. A hierarchical lamellar microstructure exhibited by these composites, with randomly orientated domains in which all ceramic and metallic lamellae are parallel to each other, is the result of the ice crystal formation during freeze-casting or ice templating of preforms from water-ceramic suspensions. In this paper, a single-domain sample of metal/ceramic composite with lamellar microstructure is modelled theoretically using a combination of analytical and computational means. Stress field in the sample containing multiple transverse cracks in the ceramic layer is determined using a modified 2-D shear lag approach and a finite element method. Degradation of stiffness properties of the sample due to multiple transverse cracking is also predicted.
| Original language | English |
|---|---|
| Pages (from-to) | 3377-3384 |
| Number of pages | 8 |
| Journal | Procedia Structural Integrity |
| Volume | 2 |
| Early online date | 21 Jul 2016 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | 21st European Conference on Fracture, ECF21 - Catania, Italy Duration: 20 Jun 2016 → 24 Jun 2016 |
Bibliographical note
Open Access funded by European Structural Integrity SocietyKeywords
- Metal-matrix composites
- transverse cracking
- stiffness degradation