Strengthening mechanism and electrochemical characterization of ZrO2 nanoparticles in Nickel-Aluminum alloy for Molten Carbonate Fuel Cells
Strengthening mechanism and electrochemical characterization of ZrO2 nanoparticles in Nickel-Aluminum alloy for Molten Carbonate Fuel Cells
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DOI：
10.1016/j.jiec.2017.07.021
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发表时间：
2017-12-25
影响因子：
6.1
通讯作者：
Nam, Suk Woo
中科院分区：
文献类型：
--
作者：
Frattini, Domenico;Accardo, Grazia;Nam, Suk Woo
本文研究了纳米氧化锆在镍铝阳极中的积极作用：结果表明，随着氧化锆含量的增加，抗弯强度和抗蠕变性能得到改善。机械强度从5.94 kg（f）cm（-2）增加到11.38 kg（f）cm（-2），蠕变降低到3.31%。形态和微观结构分析表明，纳米颗粒牢固地粘附在较大金属颗粒表面，微观结构在晶粒水平得到强化。铝原子向不同空位中的扩散减少了位错的运动。作为这些机制的一部分，电荷和质量传递电阻较低，并且在650 ℃下500小时后的内阻为0.24 m Ω cm（2）。(C)2017年韩国工业和工程化学学会。Elsevier B. V.出版，保留所有权利。
In this work the positive effect of zirconia nanoparticles in Nickel-Aluminum anodes is investigated: Results showed that, as the zirconia content increases, bending strength and creep resistance are improved. Mechanical strength increases from 5.94 to 11.38 kg(f) cm(-2) and creep is reduced up to 3.31%. Morphology and microstructural analysis revealed that nanoparticles adhere strongly on the surface of larger metal particles and microstructure is strengthened at grain level. The diffusion of Aluminum atoms into different vacancies reduces dislocations movement. A part these mechanisms, charge and mass transfer resistance are lower and the internal resistance after 500 h at 650 degrees C is 0.24 m Omega cm(2). (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.