Hasegawa Madoka, Yoon Songhak, Guillonneau Gaylord, Zhang Yucheng, Frantz Cédric, Niederberger Christoph, Weidenkaff Anke, Michler Johann, Philippe Laetitia
Empa - Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, 3602 Thun, Switzerland.
Phys Chem Chem Phys. 2014 Dec 21;16(47):26375-84. doi: 10.1039/c4cp03744h. Epub 2014 Nov 4.
The FeCrNi alloy, whose composition is close to that of stainless steel 304, was prepared by electrodeposition and characterized. Nanocrystalline FeCrNi (nc-FeCrNi) was obtained by employing a double-compartment cell where the anode is separated from the cathode compartment, while amorphous FeCrNi (a-FeCrNi) was deposited in a conventional single electrochemical cell. The carbon content of nc-FeCrNi was found to be significantly lower than that of a-FeCrNi, suggesting that carbon inclusion is responsible for the change in the microstructure. The major source of carbon is associated with the reaction compounds at the anode electrode, presumably decomposed glycine. Crystal structure analysis by XRD and TEM revealed that the as-deposited nc-FeCrNi deposits consist of α-Fe which transforms to γ-Fe upon thermal annealing. Nanoindentation tests showed that nc-FeCrNi exhibits higher hardness than a-FeCrNi, which is consistent with the inverse Hall-Petch behavior.
通过电沉积制备了成分与304不锈钢相近的FeCrNi合金并对其进行了表征。采用双隔室电池（阳极与阴极隔室分开）获得了纳米晶FeCrNi（nc-FeCrNi），而在传统的单电化学电池中沉积了非晶态FeCrNi（a-FeCrNi）。发现nc-FeCrNi的碳含量明显低于a-FeCrNi，这表明碳的夹杂是微观结构变化的原因。碳的主要来源与阳极电极处的反应化合物有关，推测是分解的甘氨酸。通过XRD和TEM进行的晶体结构分析表明，沉积态的nc-FeCrNi沉积物由α-Fe组成，热退火后转变为γ-Fe。纳米压痕测试表明，nc-FeCrNi比a-FeCrNi具有更高的硬度，这与反霍尔-佩奇行为一致。
