%0 Journal Article
%T Rapid monotecticsolidincation during free fall in a drop tube<br>Rapid monotectic solidification during free fall in a drop tube
%A WANG Haipeng
%A CAO Chongde
%A Wei Bingbo
%A <br>WANGHaipeng
%A CAOChongde
%A WeiBingbo
%J 科学通报(英文版)
%D 2004
%I 
%X Droplets of Ni-31.4%Pb monotectic alloy with different sizes are rapidly solidified during free fall in a drop tube. The theoretical calculations indicate that the undercooling was achieved before solidification exponentially depends on droplet diameter. The maximum undercooling of 241 K (0.15Tm) is obtained in the experiments. With the increase of undercooling, the volume fraction of monotectic cells increases, and the L2(Pb) grains are refined. Calculations of the nucleation rates of L2(Pb) and a-Ni phases indicate that L2(Pb) phase acts as the leading nucleation phase during the monotectic transformation.
%K monotectic solidification
%K high undercooling
%K container-less processing
%K low gravity<br>偏晶凝固
%K 偏晶合金
%K 冷却过度
%K 导电性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=3274B6C14EE8BE800961853AF1EF9D00&yid=D0E58B75BFD8E51C&vid=2A3781E88AB1776F&iid=38B194292C032A66&sid=1D67BE204FBF4800&eid=A1266CF37D675CF1&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=0