New insight into fabrication of shaped Mg-X alloy foams with cellular structure via a gas release reaction powder metallurgy route  

作　　者：H.Wang D.F.Zhu Y.Wu X.J.Liu S.H.Jiang T.G.Nieh Z.P.Lu 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China [2]Department of Materials Science and Engineering,The University of Tennessee,Knoxville 37996,TN,USA [3]School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China

出　　处：《Journal of Iron and Steel Research International》2021年第2期125-132,共8页

基　　金：supported by National Natural Science Foundation of China(No.51971017);Science Funds for Creative Research Groups of China(51921001);Program for Changjiang Scholars and Innovative Research Team in University of China(IRT_14R05);Projects of SKLAMM-USTB(2018Z-19);the financial support from the Fundamental Research Funds for the Central Universities of China(No.FRF-TP-18-004C1).

摘　　要：Shaped Mg alloy foams with closed-cell structure are highly interested for a great potential to be utilized in the fields where weight reduction is urgently required.A powder metallurgical method,namely gas release reaction powder metallurgy route to fabricate Mg-X(X=Al,Zn or Cu)alloy foams,was summarized.The principles on shaped Mg-X foams fabrication via the route were proposed.In addition,the effects of alloying elements,sintering treatment and foaming temperatures on fabrication of shaped Mg-X alloy foams were investigated experimentally.The results show that the key to ensure a successful foaming of Mg-X alloy foams is to add alloying metals alloyed with Mg to form lower melting(<600℃)intermetallic compounds by the initial sintering treatment.The foaming mechanism of Mg-X alloy foams also has been clarified,that is,the low-melting-point Mg-based intermetallic compounds melt first,and then reactions between the melt and CaCO_(3),a foaming agent,release CO gas to make the precursor foamed and finally shaped Mg-X alloy foam with a promising cellular structure is prepared.This route has been verified by successful fabrication on shaped Mg-Al,Mg-Zn and Mg-Cu foams with cellular structure.

关 键 词：Mg-X alloy foam FABRICATION Gas release reaction Cellular structure Sintering Powder metallurgy 

分 类 号：TG139.6[一般工业技术—材料科学与工程]