Laser surface cleaning of carbonaceous deposits on diesel engine piston
Laser surface cleaning of carbonaceous deposits on diesel engine piston
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DOI：
10.1016/j.apsusc.2013.01.075
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发表时间：
2013-04-01
影响因子：
6.7
通讯作者：
Zhang, Z.
中科院分区：
文献类型：
--
作者：
Guan, Y. C.;Ng, G. K. L.;Zhang, Z.
众所周知，柴油机活塞的碳质沉积物会降低发动机的耐用性和性能。利用激光技术去除沉积物的研究很少。本文采用FTIR、XPS、SEM/EDX等手段对激光清洗前后活塞冠部表面的沉积层进行了检测。发现沉积物在表面分布不均匀，主要分布在堵塞区，污染物层较厚，其余区域污染物较薄。分析了矿床的主要成分为Fe3C、Fe3O4、可能的FeOOH、含氧烃和羧酸盐。激光清洗可以完全去除Fe3C，并能显著降低含氧烃和羧酸盐的浓度。在清洗后的区域生成了Fe2O3，而不是Fe3O4。(C)2013爱思唯尔B.V.保留所有权利。
Carbonaceous deposits of diesel engine piston are known to reduce engine durability and performance. Little research has been conducted on the deposits removal by laser technique. In this paper, the deposits on the surface of piston crown part before and after laser cleaning were examined by FTIR, XPS and SEM/EDX. The deposits were found to be distributed non-uniformly on the surface and they could be distinguished as a thicker layer of contaminants, located mainly in the plug region, while a thinner layer can be found in the remaining area. The main constituents of the deposits were analyzed as Fe3C, Fe3O4, possibly FeOOH, oxygenated hydrocarbons as well as carboxylates. Laser cleaning can remove Fe3C completely, and reduce the concentration of oxygenated hydrocarbons and carboxylates significantly. Fe2O3, instead of Fe3O4, was formed on the cleaned region. (C) 2013 Elsevier B. V. All rights reserved.