Electron beam welding at ISI Brno

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F18%3A00494361" target="_blank" >RIV/68081731:_____/18:00494361 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electron beam welding at ISI Brno

Popis výsledku v původním jazyce

In vacuum technology, and especially in UHV, we often encounter the necessity of joiningnparts of various metals in combination with the demand for perfect vacuum tightness,ncleanness of joints and minimum deformations. Electron beam welding belongs to thenbest technologies capable of fulfilling such requirements.nThe principle of electron beam welding is based on the transfer of the kinetic energy of thenincident accelerated electrons to the welded material in the form of heat. The temperature innthe spot rises with the beam power density. At power densities as high as 104 - 106 W/mm2,nthe melted material at the center of the focal point evaporates. This produces a vapor capillary surrounded by melted material that allows the beam to penetrate deeper and melt more material. The speed of the penetration can be much higher than the heat transfer bynconduction into the surrounding material. This results in narrow melted area and typical knifelikenprofile of the weld. Thanks to this effect the thermal deformations of weldednpieces are highly reduced to almost none. Small heat affected zone also allows welding nearnheat sensitive parts like sensors, ceramic feed-throughs and brazed joints.

Název v anglickém jazyce

Electron beam welding at ISI Brno

Popis výsledku anglicky

In vacuum technology, and especially in UHV, we often encounter the necessity of joiningnparts of various metals in combination with the demand for perfect vacuum tightness,ncleanness of joints and minimum deformations. Electron beam welding belongs to thenbest technologies capable of fulfilling such requirements.nThe principle of electron beam welding is based on the transfer of the kinetic energy of thenincident accelerated electrons to the welded material in the form of heat. The temperature innthe spot rises with the beam power density. At power densities as high as 104 - 106 W/mm2,nthe melted material at the center of the focal point evaporates. This produces a vapor capillary surrounded by melted material that allows the beam to penetrate deeper and melt more material. The speed of the penetration can be much higher than the heat transfer bynconduction into the surrounding material. This results in narrow melted area and typical knifelikenprofile of the weld. Thanks to this effect the thermal deformations of weldednpieces are highly reduced to almost none. Small heat affected zone also allows welding nearnheat sensitive parts like sensors, ceramic feed-throughs and brazed joints.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Proceedings of the 16th International Seminar

ISBN

978-80-87441-23-7

ISSN

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e-ISSN

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Počet stran výsledku

3

Strana od-do

18-20

Název nakladatele

Institute of Scientific Instruments The Czech Academy of Sciences

Místo vydání

Brno

Místo konání akce

Skalský dvůr

Datum konání akce

4. 6. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000450591400005