金属学报  1985, Vol. 21 Issue (1): 64-68

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稀土镁球墨铸铁的共格球化

余瑞璜;刘兆芸

吉林大学;吉林大学

LATTICE CONFORMATION THEORY ON MECHANISM OF SPHERULITIC GRAPHITE FORMATION IN CAST IRON CONTAINING Ce AND Mg

YU Ruihuang(S.H.Yu);LIU Zhaoyun(Department of Physics;Jilin University;Changchun

余瑞璜;刘兆芸. 稀土镁球墨铸铁的共格球化[J]. 金属学报, 1985, 21(1): 64-68.
, . LATTICE CONFORMATION THEORY ON MECHANISM OF SPHERULITIC GRAPHITE FORMATION IN CAST IRON CONTAINING Ce AND Mg[J]. Acta Metall Sin, 1985, 21(1): 64-68.

摘要 参考文献 相关文章 Metrics 全文: PDF(1344 KB)   摘要: 本文对稀土镁球墨铸铁中石墨球化的机构进行了研究.电子探针分析表明,石墨球中心存在Ce、Mg、S;氧则均匀分布在铸铁表面而不集中在球墨中心,X射线衍射分析证实球墨是以CeS和MgS为核心.计算结果表明CeS或MgS中的Ce或Mg在垂直体心对角线[111],[11(?)],……八个方向呈六方形网状结构.若与石墨的六方网重叠吋,就会有一部分Ce或Mg原子的位置和石墨的碳原子重叠,即共格.由于Ce,Mg与碳电负性差△X较大,则碳原子易被Mg或Ce原子吸引形成石墨六方网状结构堆积在Ce或Mg的六方网上,并沿上述八个方向伸展开去结晶成石墨球. Abstract：The formation of spherulites of graphite in cast iron containing Ce and Mgwas studied.X-ray pattern and electron probe showed the presence of Ce in theform of CeS of NaCl B1 type and of CeC_2 of b.c.tetragonal C11a type crystalstructures.On the basis of the lattice constants of CeS,MgS,graphite and CeC_2,the sizes of the hexagonal nets of Ce,Mg and of graphite are calculated.It isfound that certain Ce or Mg atoms in the hexagonal nets planes normal to[111],[111],…are in conformity with the C atoms of the hexagonal nets of graphite.Due to the difference of electronegativities between Ce and C or between Mg andC of graphite,the electrostatic coulombic force from Ce or Mg will attract the Catoms precipitated from the melted liquids of cast iron to deposite as hexagonallayers on layers of graphite along the eight directions[111],[111],…of CeS orMgS.The result is the formation of spherulites of graphite.The conformation theC atoms in CeC_2 with the Ce or Mg atoms in the hexagonal nets of CeS or MgSalong the directions[100],[010],…is also briefly introduced. 收稿日期: 1985-01-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 余瑞璜 刘兆芸 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1985/V21/I1/64 1 Zachariasen,W.H.,Acta Crystallogr.,2(1949) ,388;291;57． 2 Primak,W.H.;Kaufman,H.;Ward,R.,J.Am.Chem.Soc.,70(1948) ,2043． 3 Pauling,L.,The Nature of the Chemical Bond,Cornell University Press,New York,1960,3rd ed.p.93． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed