članak: 1 od 1  
Science of Sintering
2007, vol. 39, br. 2, str. 133-144
jezik rada: engleski
neklasifikovan
doi:10.2298/SOS0702133Y

Integrated liquid-phase sintering of glass-alumina functionally graded materials
(naslov ne postoji na srpskom)
School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi’an, P. R. China

e-adresa: yucl1226@tom.com

Sažetak

Proučen je mehanizam sinterovanja funkcionalno gradiranih materijala stakla-alumine (G-A FGMs) na pripremljenih na 710oS novom tehnologijom pravljenja prototipova (RP&M). Određena je integrisana kinetočka jednačina za prvih 20 minuta. Linearno skupljanje se odvija usled integrisane aktivnosti viskoznog toka čestica stakla i gravitacijom efektinih aktiviranih granica zrna alumine ka ravnotežnom stanju. Pokretačka sila gravitacije aktiviranih granica zrna alumine vodi poreklo od zajedničkog dejstva pasivnog tola čestica alumine tokom viskoznog toka čestica stakla i kompresivne sile koja se formira tokom hlađenja. U srednjih 10 minuta proces sinterovanja prati mehanizam rastvaranja-precipitacije. Skenirajuća elektronska mikroskopija (SEM) i linijski skenirajući energetski disperzan spektar (EDS) su potvrdili formiranje sloja Si-Al eutektike od oko 1.04μm na površini alumine. Dodatno, rastvoreni joni Al se lako transportuju kroz eutektički sloj i precipitiraju na staklenoj matrici usled efekta Si u staklenoj matrici.

Ključne reči

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