%0 Journal Article
%T DENUCLEATION AND HIGH UNDERCOOLING OF Ni-32.5%Sn EUTECTIC ALLOY<br>Ni—32.5%Sn共晶合金的净化与深过冷
%A WEI Bingbo
%A YANG Gencong
%A ZHOU Yaohe Northwestern Polytechnical University
%A Xi''''an
%A <br>魏炳波
%A 杨根仓
%A 周尧和
%J 金属学报
%D 1990
%I 
%X Large undercooling up to 397 K (0.283T_E) have been obtained for Ni-32.5%Sn eutectic alloy melt by superheating-cooling cycles and denucleating withinorganic glasses. The predominant dissipation of heat for highly undercooled alloymelt is through radiation. An approximate method was consequently derived to cal-culate its mean specific heat from measured cooling curves. With the aid of highspeed cinematography, it was revealed that the surface or interface heterogeneousnucleation takes place in preference to homogeneous nucleation even though theundercooling exceeded 0.2T_E.
%K undercooling
%K rapid solidification
%K nucleation
%K eutectic alloy
%K specific heat<br>Ni－Sn合金
%K 深过冷
%K 比热
%K 共晶合金
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=9A4ADDF91C1C347BDDCD5545BFC62CAE&yid=8D39DA2CB9F38FD0&vid=96C778EE049EE47D&iid=94C357A881DFC066&sid=EFD65B51496FB200&eid=2F56B21F91C9B05B&journal_id=0412-1961&journal_name=金属学报&referenced_num=1&reference_num=1