Fe-W alloys containing -23-30 at% tungsten were electrodeposited from citrate-ammonia solutions at different cathodic current densities. A characterization of the structural properties of these coatings is reported. The 8 to 15 mu m thick Fe-W coatings obtained are smooth and nano-crystal line. The structure of such as-electrodeposited coatings evolves slightly with increasing cathodic current densities. Above 5 A dm(-2), micro-cracks appear in electrodeposited Fe-W coatings, and the oxygen content in the coatings increases. A nano-crystalline structure and a high tungsten content result in nanohardness of 13 GPa. The electrodeposited Fe-W alloys remain "nanocrystalline" after annealing up to 800 degrees C. After heating at 1000 degrees C. the nano-crystalline structure transforms into a microcrystalline one, and up to three phases are formed, namely FeWO4, Fe, and possibly Fe2W. (C) 2009 Elsevier B.V. All rights reserved.
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机译：在不同的阴极电流密度下，从柠檬酸盐-氨溶液中电沉积含23-30 at％钨的Fe-W合金。报道了这些涂层的结构特性的表征。获得的8至15微米厚的Fe-W涂层是光滑的纳米晶线。此类电沉积涂层的结构随着阴极电流密度的增加而略有变化。高于5 A dm（-2），在电沉积的Fe-W涂层中会出现微裂纹，并且涂层中的氧含量会增加。纳米晶体结构和高钨含量导致13 GPa的纳米硬度。电沉积的Fe-W合金在退火至800摄氏度后仍保持“纳米晶”。在1000摄氏度加热后，纳米晶体结构转变为微晶结构，并形成了多达三个相，即FeWO4，Fe和可能是Fe2W。 （C）2009 Elsevier B.V.保留所有权利。
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