Tribological Characteristics of WC-12Co Coatings Sliding Against SiC and Si3N4 Counter Balls
Source abstract
Abstract
The reciprocating wear behaviour of high velocity oxy-fuel WC-12Co coatings subjected to sliding against SiC and Si3N4 counter-balls was investigated by varying the load from 10 to 60 N. The worn-out coatings and the counter-balls were analyzed using scanning electron microscopy and Raman spectroscopy. The WC-12Co/SiC tribo-pair exhibited lower coefficient of friction values as compared to WC-12Co/Si3N4 tribo-pair. The coating’s volume wear rate was found to be lower when the coating was paired against the SiC counter ball as compared to the Si3N4 counter ball which is attributed to the formation of oxide layers. The volume wear rate was increased along with the load regardless of the counter ball material. The formation of tribo-chemical products was responsible to reduce the wear rate of the coatings. Abrasion, surface fatigue, and tribo-oxidation are the observed wear mechanisms for the coatings sliding against both SiC and Si3N4 counter balls under higher loads.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced materials and composites · Metal and Thin Film Mechanics · Diamond and Carbon-based Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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