Enhanced DLC wear performance by the presence of lubricant additives

AUTOR(ES)

Costa, Romina Paula de Castro, Marcian, Fernanda Roberta, Oliveira, Deiler Antônio Lima, Trava-Airoldi, Vladimir Jesus

FONTE

Materials Research

DATA DE PUBLICAÇÃO

15/04/2011

RESUMO

Lubricant additives play significant role for reducing friction and wear of mechanical elements. The additives presented in 5W30 oil were developed for metal surfaces. However, they have been used in engine pieces covered with DLC coatings because they also offer the potential to reduce friction losses and wear in automotive applications. The friction and wear tests were carried out by using a UMT-CETR ball-on-disk tribometer in rotational mode under 5W30 synthetic oil at 100 °C. The X-ray photoelectron spectroscopy (XPS) showed the presence of Mo and S in the wear tracks. These elements are from decomposition of ZDDP and MoDTC additives producing MoS2 in DLC surface, which offers enhanced durability by low wear rate.

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