%0 Journal Article
%T COERCIVITY AND ITS GRAIN SIZE DEPENDENCE IN CAST-HOT PRESSED Pr-Fe-B MAGNETS
%A CHEN Zhongmin XIE Faqin SHI Zhengxing WANG Leyi FU Hengzhi Northwestern Polytechnical University
%A Xi''''an
%A China
%A <br>CHEN Zhongmin XIE Faqin SHI Zhengxing WANG Leyi FU Hengzhi Northwestern Polytechnical University
%A Xi''''an
%A China
%J 金属学报(英文版)
%D 1992
%I 
%X Characteristics of magnetic hardening in cast-hot pressed magnet Pr_(19)Fe_(74.5)B_5Cu_(1.5)were stu-died.The microstructure features and virgin magnetization curve reveal a nucleation control-led coercivity mechanism.Regression analysis shows that the intrinsic coercivity variesinversely as the logarithm of the average grain size:_iH_c(MA/m)=1.7312-0.48161nd(μm)which confirms the randomness of nucleation of reversed domains and the statistical nature ofcoercivity,indicating that the decrease of grain size would reduce the average number of de-fects on its surface and lower the probability of magnetization reversal of a grain and the cu-mulative fraction of the grains that have reversed their magnetization.Coercivity is thus en-hanced.
%K Pr-Fe-B magnet
%K coercivity
%K grain size
%K nucleation
%K cast-hot press<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=E3B18151C9C30A4A2963E545427ED5FA&yid=F53A2717BDB04D52&vid=94C357A881DFC066&iid=5D311CA918CA9A03&sid=1F199509C0B6C4D6&eid=7C72DBC13F2D71EC&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=8