Mechanical properties of Ti(C0.7N0.3) film produced by plasma electrolytic carbonitriding of Ti6Al4V alloy
2008; Elsevier BV; Volume: 254; Issue: 20 Linguagem: Inglês
10.1016/j.apsusc.2008.03.172
ISSN1873-5584
Autores Tópico(s)Diamond and Carbon-based Materials Research
ResumoPorous nanocrystalline Ti(C0.7N0.3) film on Ti6Al4V substrate was prepared by plasma electrolytic carbonitriding (PECN). The film was characterized and analyzed by using a variety of analytical techniques, such as XRD, SEM, EDX, TEM, FESEM, Rockwell C indenter, scratch tester, Vickers microhardness tester and ring-on-block tribometer. The results showed that the film was about 15 μm thick and its hardness was Hv 2369 at a load of 0.2 N. The adhesion of the film was characterized by Lc and Pc value, and was found to be about 42 N and more than 800 N, respectively. The friction coefficients and wear volume loss of the PECN-treated samples sliding against a steel counterpart were much less than those of the untreated Ti6Al4V. The film possessed a good wear-resistance and antifriction under oil-lubricated condition due to its high hardness, adhesion and fracture toughness. Also, the porous surface morphology of the Ti(C0.7N0.3) film contributed to the enhanced tribological resistance by promoting the formation of lubricant film and entrapping wear debris.
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