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Mikrostrukture evtektikov v sistemih Ag-Cu-Zn in Au-Ag-Cu-Zn ob dodatku prehodnih kovin ter kovin III.a in IV.a skupine : zaključno poročilo o rezultatih opravljenega znanstveno-raziskovalnega dela na področju aplikativnega raziskovanjaDoberšek, MirkoZastavljeni cilji so bili v celoti doseženi, če ne celo preseženi. Rezultati raziskav so dali odgovore na vsa zastavljena vprašanja. Raziskovalno delo smo usmerjali proti cilju čim natančneje omejiti ... možne sestave novih zlitin za spajkanje jekel (ogljenih, legiranih, korozijsko odpornih), neželeznih kovin bakra, niklja in njunih zlitin, keramike. Analiza rezultatov daje možnost izbora nove zlitine iz družine srebrnih spajk Ag-Cu-Zn-Cd, ob substituciji kadmija. Ugotovljene so maksimalne možne substitucije kadmija, ob ohranjanju takšnih fizikalnih lastnosti, ki še dopuščajo klasično tehnologijo proizvodnje. Nekatere zlitine dajejo možnost izdelave spajk le v obliki past, kar bo zahtevalo razvoj proizvodnje prahov. Študij mikrostruktur, identifikacija faz, porazdelitev substituentov kadmija, so razširili znanje o večkomponentnih sistemih: Ag-Cu-Zn-Cd, Ag-Cu-Zn-Cd-In, Ag-Cu-Zn-Cd-Si, Ag-Cu-zn-In, Ag-Cu-Zn-Sn, Ag-Cu-Zn-Si. Poznavanje sprememb mikrostrukture zlitin po termični obdelavi so pomembni podatki za proizvodnjo spajk. Razširili smo metodološke možnosti identifikacije faz v zlitinah, kjer poteka že v binarnih sistemih prisotnih kovin vrsta evtektičnih in peritehničnih reakcij. V področju spajk na osnovi zlata smo razširili naša znanja o sistemih Au-Ag-Cu-Zn-Ni, Au-Ag-Cu-Zn-Ni-In in Au-Ag-Cu-Zn-Ni-In-Sn. Raziskave smo namenili k cilju znižanja vsebnosti Au in Ag, znižanju tališča spajke in ohranitvi barve.Type of material - research reportPublication and manufacture - Ljubljana : IMT, 1996Language - slovenianCOBISS.SI-ID - 28842
Author
Doberšek, Mirko
Topics
spajkanje |
spajke |
žlahtne kovine |
zlitine |
rentgenska analiza |
mikrostruktura |
raziskovalna poročila
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