Acta Metall Sin  2006, Vol. 42 Issue (11): 1207-1211     DOI:

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GRAIN SIZE OF PLATINUM NANOFILMS FABRICATED BY EB-PVD AND ITS EFFECT ON THERMAL CONDUCTIVITY

CAO Bingyang; ZHANG Qingguang; ZHANG Xing;TAKAHASHI Koji; IKUTA Tatsuya

Key laboratory for Thermal Science and Power Engineering of Ministry of Education; Department of Engineering Mechanics; Tsinghua University;Beijing 100084

CAO Bingyang; ZHANG Qingguang; ZHANG Xing; TAKAHASHI Koji; IKUTA Tatsuya. GRAIN SIZE OF PLATINUM NANOFILMS FABRICATED BY EB-PVD AND ITS EFFECT ON THERMAL CONDUCTIVITY. Acta Metall Sin, 2006, 42(11): 1207-1211 .

Abstract References Related Articles Recommended Metrics Download:  PDF(741KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Six platinum films with thickness 15-62 nm have been fabricated by the method of electron beam- physical vapor deposition (EB-PVD). The grain sizes of the platinum 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 size effect caused by the nanofilm interface and the grain boundary effect by the grain structure, the thermal conductivity of the platinum nanofilms is greatly lower than that of the bulk platinum. 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 due to the grain boundary effect. Key words:  nanofilm      thermal conductivity      grain size      grain boundary effect      size effect       Received:  24 February 2006      ZTFLH:  TG146.3   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors CAO Bingyang ZHANG Qingguang ZHANG Xing TAKAHASHI Koji IKUTA Tatsuya URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2006/V42/I11/1207 [1] Guo Y, Chang G R, Ma S L, Xu K W. Acta Metall Sin, 2005; 41: 985 (郭岩,畅庚榕,马胜利,徐可为．金属学报,2005;41:985) [2] Pei Z L, Zhang X B, Wang T G, Gong J, Sun C, Wen L S. Acta Metall Sin, 2005; 41: 84 (裴志亮,张小波,王铁钢,宫骏,孙超,闻立时．金属学报,2005;41:84) [3] Fu E G, Zhuang D M, Zhang G. Acta Metall Sin, 2005; 41: 333 (付恩刚,庄大明,张弓．金属学报, 2005;41:333) [4] Tien C L, Majumdar A, Gerner F M. 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