Picosecond-nanosecond laser composite asynchronous ceramics polishing method
US11014197B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2019 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Dec 26, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/52
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention disclose a picosecond-nanosecond laser composite asynchronous ceramics polishing method. First, a picosecond laser is used to scan and irradiate the ceramic surface along the scanning path. At the same time, ceramic surface is initially flattened and the electronic state of materials is removed by picosecond laser to produce micro-nanoparticles. Micro-nanoparticles exist as ionized state in the adjacent space region of irradiated ceramics surface. Then, low energy density nanosecond laser is used according to a preset time to irradiate and melt these micro-nanoparticles which can easily form a dense and smooth fine crystal melting layer to achieve the polishing effect. The present disclosure fixes the generation of micro-cracks and pores in traditional laser polishing process. It overcomes the shortcomings of traditional laser polishing such as large thermal influence zone, easy to generate micro-cracks and pores on the surface, etc. High efficiency and high precision submicron level fine polishing with very low material removal amount is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.