Quartz, borosilicate glass and even sapphire were successfully welded to metals, such as aluminum, titanium and stainless steel, using a laser system that acts as ultrashorts of infrared radiation pulses to the joints of the materials for their fusion.
Currently, products consisting of glass and metal are usually connected with glue. However, dirt can fall into the seam, and the components of chemicals may lose their properties and collapse, which leads to a displacement or rupture of the structure.
Researchers from the Center for Innovative Production at the Scottish University of Heriota-Watta developed a new method of welding various optical materials with metals. The process is based on the effects of incredibly short laser pulses, the duration of only a few picoseconds (10-12 s or one trillion).
Welded parts pressed each other and focus radiation through optical material to get a small but very intense spot on the interface. The team managed to achieve power in 1 MW on the square of just a few microns in cross section.
As a result of such an impact, microplasmism is formed inside the material, similar to a lightning clock, surrounded by a very limited melt area. The welds thus obtained remain strong even in extreme conditions. The researchers experienced them at temperatures from -50 ° C to 90 ° C and they retained their initial structure.
The new technology can have a huge impact on the production sector and directly apply in aerospace, defense, optical technique, and even in the field of health.
Scientists from nine research institutes recently also presented the development intended for industrial needs. They created extremely light and very durable