N'chifukwa chiyani pali thovu pa malo kuwotcherera wapakati pafupipafupi malo kuwotcherera makina?

N'chifukwa chiyani pali thovu pa malo kuwotcherera wapakati pafupipafupi malo kuwotcherera makina? Mapangidwe thovu choyamba amafuna mapangidwe kuwira pachimake, amene ayenera kukumana zinthu ziwiri: mmodzi ndi kuti madzi zitsulo ali supersaturated mpweya, ndi zina kuti ali ndi mphamvu zofunika nucleation. Kusanthula ndi njira zothetsera vuto la thovu lolumikizana ndi solder:

The supersaturation mu zitsulo zamadzimadzi ndizokwera kwambiri, ndipo pamwamba pa supersaturation, zimakhala zosakhazikika. Gasi amatha kugwa kwambiri ndikupanga thovu. Choncho, dziwe losungunuka mu kuwotcherera ali ndi zofunika supersaturation zinthu kupanga thovu. Monga momwe chitsulo chimapangidwira, kuphulika kwa phokoso kungathenso kuchitika m'njira ziwiri: nucleation yokhayokha komanso nucleation yosakhazikika. Ngati kuwira pachimake aumbike, kuwira ayenera kugonjetsa madzi kuthamanga ndi ntchito kukulitsa

Chifukwa cha kuchuluka kwa mphamvu padziko lapansi chifukwa cha kupangidwa kwa magawo atsopano, ngati phata la kuwira lomwe lili ndi kukula kwakukulu limapangidwa mumadzimadzi, mphamvu zokwanira ziyenera kuperekedwa kuti zipange mphamvu ya nyukiliya. Mwachiwonekere, kukweza mphamvu ya nucleation, m'pamenenso imakhala yocheperapo kuti ipange phata la kuwira. Mosiyana ndi izi, ndizosavuta kupanga phata la kuwira.