%0 Journal Article
%T Phase Structure Change of Mo-Si System during Mechanical Alloying<br>Phase Structure Change of Mo-Si System duringMechanical Alloying
%A Shaojun LIU
%A Xuanhui QU
%A Zhijiang LIU
%A Baiyun HUANG
%A <br>
%J 材料科学技术学报
%D 1999
%I 
%X The structure of Mo-15.16 Si, Mo-30 Si and Mo-36.3 Si (wt pct) elemental powder mixture during mechanical alloying was studied using electron microscopy and X-ray diffraction. It had been found that, in all the systems under study, silicon disappeared initially during mechanical alloying (MA). In the Mo-Si systems all products were in form of amorphous state after long time milling, but there were different intermediate products. MoSi2 and Mo5Si3 intermetallic compounds in the Mo-30Si and Mo-36.3Si (wt pct) were directly synthesized from elements through inter-diffussion process. The high density of defects and interface of nano-crystallines induced by ball milling would promote the reaction process. Only in the Mo-15.16Si (wt pct) system was Mo(Si) supersaturated solid solution formed as an intermediate product. Schematic free-energy diagram of Mo-Si system based on the thermodynamics was used to analyze the difference among the intermediate state products.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=7C953DAC25708B7A41AAF17C8FCF3E15&yid=B914830F5B1D1078&vid=23CCDDCD68FFCC2F&iid=94C357A881DFC066&sid=F27A401E323B6FAD&eid=BA48F0B914ED890A&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=0