魏氏组织表面浮突的扫描隧道显微镜研究  

STM STUDY ON THE SURFACE RELIEF EFFECTS ASSOCIATED WITH WIDMANSTATTEN FERRITE

作　　者：薄祥正[1] 方鸿生[1] 王家军[1] 王峥华 

机构地区：[1]清华大学材料科学与工程系,北京100084

出　　处：《金属学报》1998年第4期345-350,共6页Acta Metallurgica Sinica

摘　　要：用扫描隧道显微镜（STM）观察了Fe-0．37C（质量分数，％）合金中魏氏组织铁素体的表面浮突，发现其浮突形状为帐篷型和复杂形态.切变机制不能解释魏氏组织表面浮突的形成过程，而扩散控制的台阶机制可合理地解释.魏氏组织的浮突高度为70—450nm，最大形状变形约0．36.Surface relief accompanying Widmanstatten ferrite formation in an Fe-0.37Calloy was investigated by scanning tunneling microscopy (STM). It was discovered that the surface relief due to Widmanstatten ferrite formation appears to be of tent-shaped type, or complex type.The evolution of surface relief of Widmanstatten ferrite can be more interpreted by ledgewisegrowth mechanism rather than by displacive mechanism. The height of relief is 70-450 nm, and the maximum shape deformation is ca. 0.36.

关 键 词：表面浮凸 魏氏组织 扫描隧道显微镜 形状变形量 

分 类 号：TG111[金属学及工艺—物理冶金]