(Ceramic rau Hlau Assmebled PartTsim los ntawmWintrustek)
I.Ob txheej txheem ntawm Ceramic-rau-Hlau Welded Cheebtsam
Ceramic-rau-hlau welded Cheebtsamyog cov cuab yeej siv tau zoo uas siv cov txheej txheem vuam zoo los muab lub zog siab, siab roj nruj, thiab kev ntseeg tau hluav taws xob / thermal txuas ntawm cov khoom siv ceramic thiab hlau. Lawv feem ntau siv rau hauv cov ntawv thov uas xav tau kev ua haujlwm siab rau qhov kub siab, siab, lossis lub tshuab nqus tsev.
II. Active Hlau Brazing Technology
1. Cov ntsiab lus tseem ceeb
Active hlau brazing siv cov ntsiab lus reactive (titanium, zirconium, hafnium, vanadium, thiab lwm yam) nyob rau hauv lub brazing muab tub lim rau chemically react nrog ceramics, uas ua rau ib tug chemically bonded txheej ntawm ceramic-hlau interface. Cov khoom nquag no muaj qhov zoo rau cov pa oxygen, nitrogen, thiab carbon. Cov cua kub hauv lub tshuab nqus tsev lossis qhov cua tsis zoo tsim cov txheej txheem nanoscale (piv txwv li, TiO₂, TiN, TiC) ntawm cov khoom siv ceramic. Qhov no tso cai rau soaking los ntawm molten muab tub lim hlau, uas ua rau ib tug txhim khu kev qha "ceramic-reaction txheej-braze sib koom-hlau" daim ntawv cog lus.
2. Cov txheej txheem tseem ceeb
2.1 Brazing Filler Hlau System:
Ag-Cu-Ti: Kev lag luam tus qauv, kev ua haujlwm zoo heev
Cu-Ti: Tus nqi qis dua, siab kub ua haujlwm
Au-Ni-Ti: Kev ntseeg siab, kev siv dav hlau
Silver-Free Solder: Rau cov khoom siv hluav taws xob uas xav tau kev tiv thaiv kev tsiv teb tsaws nyiaj
2.2 Txheej txheem tswj:
Environmental Requirements: Lub tshuab nqus tsev siab (
Kev tswj qhov kub thiab txias: 20-50 ° C saum cov kua nplaum (800-900 ° C rau Ag-Cu-Ti system)
Lub Sijhawm Tswjhwm: Ob peb feeb mus rau nees nkaum feeb, ntsuas cov tshuaj tiv thaiv ua tiav thiab cov txheej txheem sib txuas
2.3 Txheej txheem:
Pre-kev kho mob: Precision tu ntawm ceramics thiab metallization kev kho mob; tshem tawm cov oxide txheej los ntawm cov khoom hlau
Kev sib dhos: Kev sib dhos meej ntawm ceramics, cov khoom siv hlau, thiab cov ntawv siv hluav taws xob (0.05-0.2 hli)
Nqus Brazing: Kev khiav tawm → Programmed cua sov → Tuav kub → Tswj txias
Kev kho mob tom qab: ntxuav thiab tshuaj xyuas ua ntej
III. Helium Mass Spectrometer Leak Detection Technology
1. Yam yuav tsum tau muaj kev kuaj pom Leak
Ceramic-hlau welded Cheebtsam yog ua hauj lwm nyob rau hauv high-them daim ntaub ntawv xws li lub tshuab nqus tsev vacuum thiab aerospace khoom. Xyuas kom tseeb tias lawv ua tiav nyob ze-"kev sib khi tsis muaj tseeb" (tus nqi nkag
2. Txoj Cai Tshawb Nrhiav
Siv helium ua cov pa roj, txoj hauv kev yuav siv qhov zoo ntawm nws qhov me me molecular, inert xwm, thiab tsis tshua muaj keeb kwm yav dhau. Helium nkag mus rau hauv huab hwm coj spectrometer los ntawm kev xau, yog ionized, sib cais los ntawm ib qho chaw sib nqus, thiab kuaj pom los ntawm lub tshuab kuaj tshwj xeeb. Lub teeb liab lub zog yog proportional rau cov ntsiab lus helium, tso cai rau kev xam cov nqi xau.
3. Txoj kev tshawb nrhiav tseem ceeb
Txoj Kev 1: Sniffing Method (Local Leak Detection)
Txheej txheem:
Sab hauv ntawm lub workpiece yog khiav tawm thiab txuas nrog lub tshuab nqus dej.
Sab nraud weld cheeb tsam yog scan nrog ib rab phom helium.
Cov teeb liab raug saib xyuas hauv lub sijhawm tiag tiag kom pom cov ntsiab lus xau.
Yam ntxwv:Haum rau nrhiav cov dej xau hauv cov khoom me me, siab rhiab heev.
Txoj Kev 2:Helium Hood / Enclosure Method (Kev Ntsuam Xyuas Tag Nrho Kev Ncaj Ncees)
Txheej txheem:
Lub workpiece yog ntim nrog helium thiab muab tso rau hauv lub tshuab nqus tsev hood, los yog lwm lub hood / sniffer yog siv los kuaj xyuas.
Nrhiav tau helium los yog khiav tawm.
Yam ntxwv:Ntsuas tag nrho leak nqi; haum rau cov txheej txheem complex.
4. Kev Ua Haujlwm Kev Ua Haujlwm (Siv txoj kev sniffing ua piv txwv)
4.1 Theem Npaj:
Workpiece tu, khoom calibration, thiab kev pom zoo ntawm ib puag ncig helium keeb kwm yav dhau.
4.2 Kev Ntsuas Kev Ua Haujlwm:
Lub workpiece txuas nrog lub tshuab nqus dej kom pom thiab khiav tawm mus rau qhov kev ua haujlwm siab.
Helium txau pib thaum lub kaw lus siab mus txog ≤0.1 Pa (zaum rab phom deb: 1-2 cm, siab: 0.1-0.2 MPa).
Kev soj ntsuam zoo raws li qhov vuam seam, nrog rau kev tsom mus rau thaj chaw ntawm cov kev ntxhov siab thermal.
4.3 Kev txheeb xyuas cov ntaub ntawv:
Lub tswb yuav tshwm sim yog tias tus nqi xau tshaj qhov pib (piv txwv li, 1 × 10⁻⁹ Pa·m³ / s).
Cov ntsiab lus xau tau raug cim, thiab kuaj pom cov xwm txheej thiab cov ntaub ntawv raug kaw.
4.4 Kev Tshawb Fawb thiab Tshaj Tawm:
Rov kuaj dua tom qab kho, ua raws li kev tsim cov ntawv qhia ua tiav.
5. Kev txiav txim siab tshwj xeeb thiab cov qauv
Ceramic-Specific Adaptations: Tsom ntsoov rau kev kuaj xyuas thaj tsam microcrack los ntawm thermal expansion mismatch.
Sensitivity Grading: Xaiv raws li daim ntawv thov teb; aerospace-qib cov kev xav tau yuav ncav cuag qib siab li 10⁻¹² Pa·m³/s.
Standard Compliance: Ua raws li lub teb chaws / tub rog qauv, ASTM, los yog kev lag luam tshwj xeeb specifications.
Failure Analysis: Microstructural analysis, xws li metallographic sectioning and scanning electron microscopy (SEM), rau cov ntsiab lus xau tshaj cov qauv.
Wintrustek yuav ua helium leak test rau txhua qhov ceramic rau hlau. Thov tshawb xyuas qhov txuas hauv qab no rau kev xa mus rau peb qhov kev ntsuas qhov xau:
https://youtu.be/Et3cTV9yD_U?si=Yl8l7eBH5rON7I_f
IV. Hom Daim Ntawv Thov Scenarios
Fais fab Electronics Ntim: Kev sib txuas ntawm cov khoom siv hluav taws xob (AlN / Al₂O₃) thiab cov txheej tooj liab hauv IGBT modules.
Nqus System Cheebtsam: Ceramic-rau-hlau ntsaws ruaj ruaj nyob rau hauv particle accelerators thiab semiconductor khoom.
Aerospace: Cav sensors thiab spacecraft sealing windows.
Zog thiab Optoelectronics: Roj cell interconnects thiab high-power laser ntim.
V. Summary
Active hlau brazing yog lub hauv paus txoj hauv kev ua kom muaj kev vam meejceramic-rau-hlaujunctions, nrog helium huab hwm coj spectrometer leak nrhiav tau ua tus qauv kub rau kev lees paub lawv cov hermeticity. Kev sib xyaw ua ke ntawm ob lub thev naus laus zis no lav qhov kev cia siab ntev ntawm cov khoom siv welded hauv cov xwm txheej hnyav. Hauv kev siv tiag tiag, nws yog ib qho tseem ceeb rau kev txhim kho cov txheej txheem brazing thiab xaiv cov txheej txheem kom pom cov xau thiab cov qib rhiab heev nyob ntawm cov qauv ua haujlwm, cov khoom siv, thiab cov kev xav tau ntawm daim ntawv thov. Txoj hauv kev no txhim kho lub voj kaw zoo tswj qhov system uas khiav los ntawm kev tsim khoom mus rau qhov tseeb.
