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Mechanical characteristics of the sistem "diamond - like carbon coating/Nd-Fe-B-tipe sintered magnetстатья
- Авторы: Kolchugina N.B., Lukin A.A., Burkhanov G.S., Sprigin G.S., Kursa M., Bukov P.A., Scotnicova K., Antonova M.S., Kaminskaya T.P.
- Сборник: The 12-th China-Russia Symposium on Advance Material and Technologies, november 19-22, 2013
- Том: 1
- Год издания: 2013
- Место издания: Yannan Publishing Group Corporation Yannan Science and Technology Press China
- Первая страница: 340
- Последняя страница: 343
- Аннотация: Diamond-like carbon (DLC) coating was applied on ground and polished surfaces of Nd-Fe-B sintered magnet (prepared with 4% TbH2) using reactive ion-beam synthesis via the deposition directly from ion-beam of a complex chemical substance (cyclohexane). The composition and thickness of the coating was analyzed by glow-discharge spectroscopy. The thickness of pure carbon (DLC) layer is 0.08 μm. The existence of transition layer 0.08-0.07 μm thick is due to the diffusion (to a lesser degree) and surface roughness. The effect of the coating on surface mechanical characteristics of the magnet was estimated in studying the Vickers hardness of the surface and friction coefficient and by scratch tests and nanoindentation as well. The Nd-Fe-B magnets with applied diamond-like coating demonstrate the lower tendency to mechanical cracking. Dry frictional tests showed that, after wear-in process, the DLC increases substantially the stability of frictional process and decreases in the frictional coefficient in the cases of both unchanged and progressively increasing loads. The better adhesion of DLC on the polished surface is demonstrated. The obtained data allow us to predict the possibility of application of the DLC coating for the increase in wear-resistance of sintered Nd-Fe-B magnets during their operation under sliding conditions and in moving abrasive liquid and gas media.
- Добавил в систему: Каминская Татьяна Петровна