%0 Journal Article
%T MICROSTRUCTURE AND MAGNETIC HARDENING OF SINTERED NdFeB MAGNETS DOPPED WIHT Dy OR Dy_2O_3
%A ZHOU Shouzeng ZHANG Jin MA Deqing GAO Maolin University of Science
%A Technology Beijing
%A Beijing
%A China
%A <br>ZHOU Shouzeng ZHANG Jin MA Deqing GAO Maolin University of Science and Technology Beijing
%A Beijing
%A China
%J 金属学报(英文版)
%D 1992
%I 
%X The magnetic properties,microstructure and magnetic hardening of sintered(Nd_(1-x)Dy_x)_(16)Fe_(77.2)B_(6.8) and Nd_(16)Fe_(77.2)B_(6.8)+ywt-%Dy_2O_3 magnets have been stud-ied.As an addition of Dy to the magnet during smelting,Dy atoms may enter thematrix phase Nd_2Fe_(14)B,so as to enhance H_A,refine grains and improve boundary struc-ture,as well as to increase H_(ci)of the magnet.If Dy_2O_3 is added to powder materialprior to sintering,Dy atoms diffuse into the epitaxial layer of grains of matrix phasecausing enhancement of K′_1,also refinement of grains and improvement of boundarystructure.The NdFeB based permanent magnets with higher H_(ci) and greater(BH)_mmay be produced by adding about 2—3 wt-% Dy_2O_3 which make a favourable conditionfor lower cost.
%K NdFeB magnet
%K coercivity
%K microstructure
%K Dy
%K Dy_2O_3<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=4FCA72AA0584AE4733FFDE56A4C84431&yid=F53A2717BDB04D52&vid=94C357A881DFC066&iid=708DD6B15D2464E8&sid=381FB4265090A8E0&eid=35E8A259891FB32F&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=6