Electrical discharge coating of nanostructured TiC-Fe cermets on 304 stainless steel
Electrical discharge coating of nanostructured TiC-Fe cermets on 304 stainless steel
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DOI：
10.1016/j.surfcoat.2016.09.062
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发表时间：
2016-12-15
影响因子：
5.4
通讯作者：
Brown, Paul D.
中科院分区：
文献类型：
--
作者：
Algodi, Samer J.;Murray, James W.;Brown, Paul D.
本文研究了304不锈钢表面TiC-Fe金属陶瓷涂层的电火花沉积（EDC）工艺随电流（2-19 A）和脉冲时间（2-64 μ s）的变化规律。涂层形貌，包括TiC，γ-Fe，α-Fe和无定形碳的混合物，其特征在于使用扫描电子显微镜（SEM），能量色散谱（EDS），X射线衍射（XRD）和横截面透射电子显微镜（TEM）的组合技术。开发的涂层表现出可变的硬度值，高达一个数量级高于基板，取决于纳米结构的TiC颗粒的含量和分散在Fe基体。涂层硬度被认为是增加电流，但在高脉冲时间的条件下，反映了TiC的量的差异纳入涂层的下降。使用低加工能量的条件实现了优化的涂层，从而最大限度地减少了孔隙和裂纹的发展。(C)2016作者由爱思唯尔公司出版
The electrical discharge coating (EDC) process, as used for the development of TiC-Fe cermet coatings on 304 stainless steel, has been investigated as a function of increasing current (2-19 A) and pulse-on time (2-64 mu s). Coating morphologies, comprising of a mixture of TiC, gamma-Fe, alpha-Fe and amorphous carbon, were characterised using the combined techniques of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and cross-sectional transmission electron microscopy (TEM). The developed coatings exhibited variable hardness values, up to an order of magnitude higher than that of the substrate, depending on the content and dispersion of nanostructured TiC particles within the Fe matrix. Coating hardness was found to increase with increasing current, but decrease under conditions of high pulse-on times, reflecting differences in the amount of TiC incorporated into the coatings. Optimised coatings were achieved using conditions of low processing energy which minimised the development of pores and cracks. (C) 2016 The Authors. Published by Elsevier B.V.