Reduced sliding friction on flat and microstructured metal injection molded (MIM) WC-Co hard metals with MoS2 composite lubricants
Tiedosto(t)
Rinnakkaistallenteen versio
published versionPäivämäärä
2021Tekijä(t)
Yksilöllinen tunniste
10.1016/j.triboint.2021.107020Metadata
Näytä kaikki kuvailutiedotLisätietoa
Rinnakkaistallenne
Viittaus
Dawari, Christopher K. Haq, Inzimam. Mönkkönen, Kari. Suvanto, Mika. Saarinen, Jarkko J. (2021). Reduced sliding friction on flat and microstructured metal injection molded (MIM) WC-Co hard metals with MoS2 composite lubricants. Tribology international, 160, 107020. 10.1016/j.triboint.2021.107020.Oikeudet
Tiivistelmä
Surface texturing with lubricant mixtures was studied by dynamic coefficient of friction (COF) values on micropit and micropillar WC-Co hard metal specimens that were fabricated using a micro-working robot technique combined with metal injection molding (MIM). Lubricating grease mixed with MoS2 was investigated, and 40 wt% additive level of MoS2 reduced COF values by 45% down to 0.06 level on flat WC-Co specimens. The corresponding COF values for the micropit specimens were higher up to 0.10 that may result from the small contact area of the used pin. On the contrary, a reduction of COF values was observed for micropillar specimens compared to the flat WC-Co specimens induced by a load carrying structure of the micropillar specimen. A highly stable antiwear behavior was observed for specimens with micropits.