Kupanga njira ya high entropy alloy

Posachedwapa, makasitomala ambiri adafunsa za aloyi wapamwamba wa entropy. Kodi njira yopangira ma high entropy alloy ndi iti? Tsopano tiyeni tigawane nanu ndi mkonzi wa RSM.

Njira zopangira ma alloys apamwamba a entropy zitha kugawidwa m'njira zitatu zazikulu: kusakaniza kwamadzimadzi, kusakaniza kolimba ndi kusakaniza kwa gasi. Kusakaniza kwamadzimadzi kumaphatikizapo kusungunuka kwa arc, kusungunuka kukana, kusungunuka kwa induction, Bridgman solidification ndi laser additive kupanga. Mu phunziroli, ma aloyi ambiri a entropy amapangidwa ndi kusungunuka kwa arc, ndipo kusungunuka kwa arc kumachitika pamalo otsekedwa ndi argon akuponya ma aloyi osungunuka. Aloyi yopangidwa imasungunuka pogwiritsa ntchito vacuum arc melter. Makina osungunula guluu amakhala ndi batani crucible. Kusungunula kumachitika pogwiritsa ntchito tungsten electrode yomwe imagwiritsa ntchito tinthu tating'onoting'ono tomwe timagwiritsa ntchito ngati ndalama kuti iwononge arc. Chipindacho chimapopedwa pogwiritsa ntchito pampu ya turbomolecular ndi mpope wovuta kupeza pafupifupi 3 × 10 − 4 Tor. Argon imadzazidwa m'chipindamo kuti achepetse kupanikizika pang'ono kuti apange plasma pamene arc ikugunda. Ndiye dziwe losungunuka limagwedezeka ndi plasma wamba. Njirayi imabwerezedwa kangapo kuti ikwaniritse kufanana kwa zolembazo.

Mulimonsemo, vuto la kutentha kwa zigawo pamodzi limapanga kupanga hypoeutectic. Chifukwa cha kuzizira kwapang'onopang'ono, mawonekedwe ndi kukula kwa ma ingots a chipika ndizochepa, ndipo ndizokwera mtengo kugwiritsa ntchito lusoli kupanga ma alloys apamwamba a entropy. Njira yosanganikirana yolimba imaphatikizapo kuphatikizika kwamakina ndi njira zophatikizira zotsatizana. Kafukufuku wina akuwonetsa kuti makina alloying amapanga yunifolomu komanso yokhazikika ya nanocrystalline microstructure. Njira yosakanikirana ndi mpweya imaphatikizapo epitaxy ya molecular, sputtering deposition, pulsed laser deposition (PLD), kuyika kwa nthunzi ndi kuyika kwa atomiki.