Abstract
This paper presents a facile and effective method for preparing Ni/NbSe2 composites in order to improve the wettability of NbSe2 and copper matrix, which is helpful in enhancing the friction-reducing and anti-wear properties of copper-based composites. The powder metallurgy (P/M) technique was used to fabricate copper-based composites with different weight fractions of Ni/NbSe2, and tribological properties of composites were evaluated by using a ball-on-disk friction-and-wear tester. Results indicated that tribological properties of copper-based composites were improved by the addition of Ni/NbSe2. In particular, copper-based composites containing 15 wt.% Ni/NbSe2 showed the lowest friction coefficient (0.16) and wear rate (4.1 × 10−5 mm3·N−1·m−1) among all composites.
Highlights
Owing to its low cost, ease of production, and excellent thermal and electrical conductivities, copper and its composites have always attracted considerable interest among all metallic materials [1,2,3,4].These merits have made copper-based composites become potential materials in industrial applications, such as for automobiles, marines, and machinery
It is of vital significance to develop the friction-reducing and anti-wear properties of copper-based composites
Kumar and Kovacik et al [5,6] found that copper matrix composites exhibit outstanding tribological properties compared with pure copper by the addition of MoS2 or graphite
Summary
Owing to its low cost, ease of production, and excellent thermal and electrical conductivities, copper and its composites have always attracted considerable interest among all metallic materials [1,2,3,4]. The mechanical property of NbSe2 is higher than that of graphite and MoS2 , which could further improve the wear resistance of copper-based composites. NbSe2 can be used as the substitute of MoS2 or graphite Some researchers, such as Shi et al [9] found that the friction-reducing and anti-wear properties of copper-based composites with nano-sized NbSe2 improved compared to those with micro-sized NbSe2 , and the formation of Materials 2019, 12, 1854; doi:10.3390/ma12111854 www.mdpi.com/journal/materials. Found that the addition of NbSe2 could effectively reduce the plastic deformation of the substrate, making the friction and wear properties of the composite greatly improved. Ni-coated graphite added into a bronze matrix can obtain a good interfacial combination, and make the wear resistance improve further. NbSe2 to copper matrix, but the corresponding wear mechanisms are discussed
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