%0 Journal Article
%T GRAIN SIZE OF PLATINUM NANOFILMS FABRICATED BY EB-PVD AND ITS EFFECT ON THERMAL CONDUCTIVITY<br>纳米Pt膜的晶粒尺寸及其对热导率的影响
%A CAO Bingyang
%A ZHANG Qingguang
%A ZHANG Xing
%A TAKAHASHI Koji
%A IKUTA Tatsuya
%A <br>曹炳阳
%A 张清光
%A 张兴
%A TAKAHASHI Koji
%A IKUTA Tatsuya
%A 乔文明
%A FUJII Motoo
%J 金属学报
%D 2006
%I 
%X Six Pt films with thicknesses of 15-62 nm have been fabricated by electron beam-physical vapor deposition (EB-PVD). The grain sizes of the Pt nanofilms and its effect on the thermal conductivity have been studied experimentally. It is found that the grain size increases with the nanofilm thickness increasing and goes to a constant about 20 nm. The grain size is nearly comparable with the nanofilm thickness with the thickness less than 30 nm, while becomes much less than the nanofilm thickness with the thickness larger than 30 nm. Influenced by the surface and grain boundary effects, the thermal conductivity of the Pt nanofilms is greatly lower than that of the Pt bulk. It is noted that the thermal conductivity of the studied platinum nanofilms increases with the thickness increasing and runs to 35 W/mK, which is much lower than that of the bulk material.
%K Pt nanofilm
%K thermal conductivity
%K grain size
%K grain boundary effect
%K size effect<br>Pt纳米薄膜
%K 热导率
%K 晶粒尺寸
%K 晶界效应
%K 尺寸效应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=FB2156E68DCC5A73&yid=37904DC365DD7266&vid=ECE8E54D6034F642&iid=708DD6B15D2464E8&sid=86CBF6E43FA9E551&eid=C4B40BDE3E33484C&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=13