title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾ÑÐµÑÑÐ¾Ð² ÑÐ²Ð°ÑÐºÐ¸ ÑÐ°Ð·Ð½Ð¾ÑÐ¾Ð´Ð½ÑÑ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð² (Ð¼ÐµÑÐ°Ð»Ð» -Ð¿Ð¾Ð»ÑÐ¿ÑÐ¾Ð²Ð¾Ð´Ð½Ð¸Ðº) Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð»Ð°Ð·ÐµÑÐ½Ð¾Ð³Ð¾ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ ÐÐ- Ð´Ð¸Ð°Ð¿Ð°Ð·Ð¾Ð½Ð° Ð¸ Ð´Ð»Ð¸ÑÐµÐ»ÑÐ½Ð¾ÑÑÑÑ Ð¸Ð¼Ð¿ÑÐ»ÑÑÐ¾Ð² 50 Ð¿Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Investigation of welding processes of dissimilar materials (metal-semiconductor) using IR range laser radiation with pulse duration of 50 ps
Creators: name: ÐÐ¾ÑÑÐµ, Ð¡Ð°Ð²ÐµÐ»Ð¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: Ð¿Ð¸ÐºÐ¾ÑÐµÐºÑÐ½Ð´Ð½ÑÐµ Ð¸Ð¼Ð¿ÑÐ»ÑÑÑ
ÑÐ²ÐµÑÑ ÐºÐ¾ÑÐ¾ÑÐºÐ¸Ðµ Ð¸Ð¼Ð¿ÑÐ»ÑÑÑ
Ð»Ð°Ð·ÐµÑÐ½Ð°Ñ ÑÐ²Ð°ÑÐºÐ°
ÑÐ°Ð·Ð½Ð¾ÑÐ¾Ð´Ð½Ð°Ñ ÑÐ²Ð°ÑÐºÐ°
Ð»Ð°Ð·ÐµÑÐ½Ð°Ñ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ°
Ð¼Ð¸ÐºÑÐ¾Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ°
picosecond pulses
ultrashort pulses
laser welding
laser machining
micromachining

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description: The subject of the graduate qualification work is Â« Investigation of welding pro-cesses of dissimilar materials (metal-semiconductor) using IR range laser radiation with pulse duration of 50 ps. The work was carried out at laboratory of Â«Laser and plasma technologyÂ» SPbPU. Within the framework of this work, the processes of laser welding of the sili-con-steel system using 50 ps IR pulses were studied. As part of the work, the main patterns and features of laser welding and processing with ultrashort laser pulses were studied. A series of experiments various welding of dissimilar materials was carried out. A process parameter window has been explored, which makes it possi-ble to achieve effective formation of a fused region using following parameters fre-quency 1-4 MHz, average power10-30 W. The structural features of the welding ar-eas were studied using scanning electron microscopy (SEM), alongside with chem-ical composition of the interface area. As a result of the work, it was possible to implement the process of welding silicon-steel system with surface concentration of silicon reaching 11 %.