Rev.Adv.Mater.Sci. (RAMS)
No 1, Vol. 18, 2008, pages 50-55

THE TRIBOLOGICAL BEHAVIOR OF BLENDED NiTiZrSiSn
BULK METALLIC GLASS MATRIX COMPOSITE SPRAY COATING

Jinhwan Cho, Juneseob Kim, SoonYoung Hwang and Changhee Lee

Abstract

In this study, the newly designed [BMG]-Cr2O3-Ag-BaF2/CaF2 coating was deposited by atmospheric plasma spraying and then compared with a [BMG]-Cr2O3 coating in view of the wear properties and the effect of solid lubricant addition in regards to tribological behavior or friction. The tribological behavior of the BMG base blended coating was evaluated by a rig test which simulated real service conditions in the turbo-machinery components and tests were conducted at both room temperature and high temperature [350 úC]. The results showed that, the [BMG]-Cr2O3-Ag-BaF2CaF2 coating had a considerably lower friction and excellent wear depth at RT and high temperature due to tribofilm of solid lubricant. However, the friction current of the [BMG]-Cr2O3 was slightly higher due to the crystalline phase transformation that occurred on the worn surface. As the temperature increased, the worn surface of the [BMG]-Cr2O3 displayed plastic deformation and a crystallized layer indicating that temperature wearing on the interface lead to a temperature higher than the glass transition temperature (Tg).

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