%0 Journal Article
%T UNDERCOOLING AND FORMATION OF SUPERSA-TURATED SOLID SOLUTION OF Pd-Ni-P IN A 20m DROP TUBE<br>20m落管中Pd-Ni-P合金的过冷与过饱和固溶相的形成
%A XU YING-FAN
%A CHEN HONG
%A WANG WEN-KUI
%A <br>许应凡
%A 陈红
%A 王文魁
%J 物理学报
%D 1992
%I 
%X Undercooling behavior of Pd43.5Ni43.5P13 alloy was studied in a 20m drop tube. The solidified droplets were spheres with size ranged from 0.2 to 2.5 mm in diameter. The samples were examined by X-ray diffraction, scanning electron microscopy and X-ray energy dispersive spectrum. The results showed that when the alloy solidified in nitrogen at pressure of 1.8×104Pa, a near single phase of Pd-Ni-P fcc solid solution was obtained. This fact suggests that a partitionless solidification may occur during the solidification of the alloy in free fall. In addition, when the droplets solidified in nitrogen at pressure of 8.0×104Pa, an amorphous phase presented in the sample. This indicate that the sample had partially undercooled below the glass transition temperature Tg.
%K 落管
%K 合金
%K 过冷
%K 固溶相
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=BEFBFF6E39731EC4ACAB04BA5AE25896&yid=F53A2717BDB04D52&vid=2001E0D53B7B80EC&iid=DF92D298D3FF1E6E&sid=A6B1729CC57A879A&eid=C92F92E9A15D3512&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=4