期刊
METALS
卷 10, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/met10070856
关键词
cavitation erosion; sliding; wear; friction coefficient; failure mechanism; cold spray; composite; copper; aluminium; alumina; MMC
资金
- Lublin University of Technology-Regional Excellence Initiative - Polish Ministry of Science and Higher Education [030/RID/2018/19]
The paper investigates the cavitation erosion (CE) and sliding wear (SW) resistance of cold-sprayed Al/Al(2)O(3)and Cu/Al(2)O(3)composites and studies them in relation to a set of metallic materials such as aluminium alloy (AlCu4Mg1), pure copper (Cu110), brass (CuZn40Pb2) and stainless steel (AISI 304). The coatings were deposited on stainless steel by low-pressure cold spray (LPCS) using Al (40 wt.%) and Cu (50 wt.%) blended with Al2O3(60 and 50 wt.%, respectively) feedstocks. CE resistance was estimated by the stationary sample method according to the ASTM G32 standard. The SW test was conducted using a ball-on-disc tester with compliance to the ASTM G99 standard. Results obtained for the LPCS coatings show that the Cu/Al(2)O(3)coating exhibits a denser structure but lower adhesion and microhardness than Al/Al2O3. The Al/Al(2)O(3)and Cu/Al(2)O(3)resistance to cavitation is lower than for bulk alloys; however, composites present higher sliding wear resistance to that of AlCu4Mg1, CuZn40Pb2 and stainless steel. The CE wear mechanisms of LPCS composites start at the structural discontinuities and non-uniformities. The cavitation erosion degradation mechanism of Al/Al(2)O(3)relies on chunk material detachment while that of Cu/Al(2)O(3)initiates by alumina removal and continues as layer-like Cu-metallic material removal. CE damage of metal alloys relies on the fatigue-induced removal of deformed material. The SW mechanism of bulk alloys has a dominant adhesive mode. The addition of Al(2)O(3)successfully reduces the material loss of LPCS composites but increases the friction coefficient. Coatings' wear mechanism has an adhesive-abrasive mode. In both CE and SW environment, the behaviour of the cold-sprayed Cu/Al(2)O(3)composite is much more promising than that of the Al/Al2O3.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据