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• W3157343659 abstract "A study has been conducted on the tribological properties of WC-Co hardmetals by carrying out a series of wear tests from the nanoscale up to the macroscopic scale. The composition of the hardmetals was varied and the binder content ranged from 6 to 15 wt%. The binder in all the samples was cobalt and one of the samples had small additions of Cr3C2 and VC. The WC grain size in the samples ranged from 250 nm (nano-size) up to 2.65 µm (coarse-grained). A binderless WC sample and a pure cobalt sample were also included in this work and the mechanical properties of all the samples were measured using nanoindentation. The wear tests on the nanoscale consisted of scratch testing using a Nanoindenter XP. Macroscopic wear was investigated by conducting three body abrasive and sliding wear tests. The binderless WC sample was found to have the best performance at loads below 1 N. In this load range a smaller grain size led to an increase in the scratch resistance for samples with 6 wt% binder. On the other hand for the samples with 15 wt% binder, a smaller grain size resulted in a decrease in the scratch resistance. In the 1 to 10 N load range the binderless WC underwent brittle wear which led to very high scratch depths. Whereas for the samples containing 15 wt% Co a smaller grain size resulted in an increase in the scratch resistance. The finer grained hardmetals exhibited lower abrasive wear rates than their coarse grained counterparts. The main wear mechanisms were found to be plastic deformation via glide activity, microcracking, binder extrusion and grain fall out." @default.
• W3157343659 created "2021-05-10" @default.
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• W3157343659 date "2009-01-01" @default.
• W3157343659 modified "2023-09-28" @default.
• W3157343659 title "The Wear Properties of Tungsten Carbide-Cobalt Hardmetals from the Nanoscale up to the Macroscopic Scale" @default.
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