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首页> 美国卫生研究院文献>Nanoscale Research Letters >Composition Morphology and Topography of Galvanic Coatings Fe-Co-W and Fe-Co-Mo
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Composition Morphology and Topography of Galvanic Coatings Fe-Co-W and Fe-Co-Mo

机译：电镀层Fe-Co-W和Fe-Co-Mo的组成形态和形貌

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摘要

Ternary coatings Fe-Co-W with an iron content of 40–55 at.%, cobalt 39–44 at.%, and tungsten 4–12 at.% and Fe-Co-Mo with an iron content of 40–55 at.%, cobalt 39–44 at.%, and tungsten 4–12 at.% were obtained by galvanostatic and pulse electrolysis on the mild steel substrate from iron(III) citrate-based electrolyte. The influence of electrolysis mode and parameters on composition of deposited alloys was studied. The competing reduction of iron and tungsten in Fe-Co-W coatings as well as the competitive deposition of iron and cobalt in Fe-Co-Mo coatings at various current densities were defined. Simultaneously, the alloy enrichment with molybdenum is more marked at a pulse mode. Atomic force microscope analysis of the Fe-Co-W alloy coating morphology and surface topography indicates their globular structure with spherical grains in the range of 2.5–3.5 μm. The surface of Fe-Co-Mo is characterized by parts of a globular structure with an average conglomerate size of 0.3–0.5 μm and singly located cone-shaped hills with a base diameter of 3 μm. Sites with a developed surface were detected within the same scan area which topography is identical to the crystal lattice of cobalt with the crystalline conglomerate sizes in the range of 0.2–1.75 μm.
机译：三元涂层Fe-Co-W铁含量为40-55 at％，钴39-44 at。％和钨4-12 at。％以及Fe-Co-Mo铁含量为40-55 at％ ％，％39-44 at％的钴和4-12 at％的钨通过在柠檬酸铁（III）电解质上在低碳钢基材上进行恒电流和脉冲电解而获得。研究了电解方式和参数对熔敷合金成分的影响。定义了在不同电流密度下，Fe-Co-W涂层中铁和钨的竞争还原以及Fe-Co-Mo涂层中铁和钴的竞争性沉积。同时，在脉冲模式下，钼的合金富集更加明显。原子力显微镜对Fe-Co-W合金涂层的形态和表面形貌的分析表明，它们的球状结构具有2.5-3.5μm的球形晶粒。 Fe-Co-Mo的表面特征是球状结构的部分，平均砾岩大小为0.3-0.5μm，并且单个位于圆锥形的山丘上，基径为3μm。在相同的扫描区域中检测到表面发达的部位，该部位的形貌与钴的晶格相同，且结晶团块的尺寸在0.2–1.75μm的范围内。

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