Corrosion behavior of the embedded layer with nanometer phase in Ti and Ti+C-implanted steel

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2000, Vol.169 (1), p.112-117
• Main Authors: Zhang, Tonghe, Wu, Yuguang, Zhang, Huixing, Deng, Zhiwei, Zhou, Gu, Liang, Hong, Ma, Furong, Zhang, Xiaoji, Wang, Xiaoyan
• Format: Article
• Language: English
• Subjects: Embedded structure; MEVVA implantation; Nanometer phase; TEM; Ti and Ti + C
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/S0168-583X(00)00026-4

Ti and Ti + C ions were implanted into H13 steel, the cross-sections of the samples were observed by transmission electron microscope (TEM). The results show that the structure of the implanted layer has greatly changed. The layer, embedded with nanometer phase of FeTi 2, TiC and Fe–C compound, is formed in Ti and Ti + C ion-implanted layer. The thickness of the embedded layer is greater than that of the corresponding ion range. The structure of the double ion-implanted layers is obviously different. The wear resistance and hardness of Ti or Ti + C-implanted H13 steel increased, and the friction coefficient decreased. This indicates that unique resistance for wear and corrosion can be obtained. An even higher corrosion resistance has been found, as the layer with an embedded structure was formed in Ti or Ti + C-implanted H13 steel. The results of electrochemical measurement show that the corrosion current density decreases obviously with increase of ion dose. The corrosion current density of Ti-implanted steel with a dose 1.3×10 18 cm −2 is 5–13% of that of unimplanted steel. The corrosion behavior of Ti + C dual implantation could be further improved; the corrosion current density is 1.2% of that of non-implanted samples. The corrosion trace could not be observed on the annealing sample by scanning electron microscope (SEM), after multi-sweep cyclic voltammetry (CV) of 40 cycles were performed on it. Finally, the modification mechanism of Ti or Ti + C-implanted H13 steel is discussed.