Features of laser drilling of porous aluminosilicate ceramics
| Autor: | P.A. Márquez Aguilar, E. Moreno Bernal, A. Castro Hernandez, Mykola Kakazey, R. Guardian Tapia, Marina Vlasova |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering Composite number Perforation (oil well) Compaction Condensed Matter Physics Computer Science::Other Condensed Matter::Soft Condensed Matter Condensed Matter::Materials Science Mechanics of Materials Aluminosilicate Condensed Matter::Superconductivity visual_art Phase (matter) visual_art.visual_art_medium General Materials Science Ceramic Composite material Porosity Laser drilling |
| Zdroj: | MRS Advances. 5:3045-3054 |
| ISSN: | 2059-8521 |
| DOI: | 10.1557/adv.2020.435 |
| Popis: | Studies have shown that local laser heating/“drilling” of composite large-porous ceramics consisting of aluminosilicates and glass phase is based on melting and ablation processes that lead to the formation of holes in a porous specimen. The interaction of the components of the composite in the high-temperature heating zone is accompanied by the formation of glass-phase melt of new composition. The advance of the melt deep into the sample along channel-like pores of the main ceramic material depends on the viscosity of the melt (i.e., the irradiation mode) and the cooling rate of the melt (i.e., the thermo-physical properties of the ceramics and glass phase). The development of gas-dynamic impact in the laser heating zone leads not only to the ejection of a part of the melt from the channel, but also to the compaction of the ceramics adjacent to the walls of the vitrified channel. These effects depend heavily on the ceramic-to-glass phase ratio and the porosity of the initial ceramic. It has been established that “laser perforation” of highly porous aluminosilicate ceramics leads to the hardening of the coarse-porous ceramics due to the formation of holes with strong walls, consisting of layers of the glass phase and compacted ceramics in the sample. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink