%0 Journal Article
%T Fabrication of Regular Porous Magnesium with Radial Pore Distribution<br>用金属/气体共晶二维定向凝固法制备放射状规则多孔Mg
%A Yuan Liu
%A <br>王 雪
%A 李言祥
%A 刘 源
%J 金属学报
%D 2006
%I 
%X By use of the 2D Gasar process (bidirectional solidification of metal-gas eutectic), with high-pressure hydrogen or gas mixture of hydrogen and argon introduced into the chamber, porous magnesium samples with radial pore distribution have been fabricated successfully through heat transferring in the radial direction.In addition,the structural features and the effects of gas pressure on porosity,pore size and distribution were studied.The results show that a larger convection will appear in the melt near the solidified front due to eutectic formation,and affect the growth of the gas pore and make gas escape.The escape rate reduces with argon pressure increasing.Gas will not escape when argon pressure is larger than hydrogen pressure.This model can be used to predict the porosity.
%K Mg<br>多孔金属
%K 共晶凝固
%K 二维Gasar
%K 放射状孔结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=1E6AB567B5170415&yid=37904DC365DD7266&vid=ECE8E54D6034F642&iid=F3090AE9B60B7ED1&sid=6A12B9FCEF71AE29&eid=4AB97D697AC3192E&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=11