Effects of Y–Ce on wear behaviours of silicide coatings

Abstract

Pure silicide coatings and Y-Ce modified silicide coatings were prepared on Ti-6Al-4V alloy by pack cementation process. The coating structures as well as their wear behaviours were comparatively studied. The results showed that the pure silicide coating and Y-Ce modified silicide coating prepared at 1080uC for 4 h had similar coating structures, mainly consisting of a TiSi 2 outer layer, a TiSi middle layer and a Ti 5 Si 4 inner layer. However, the microhardness of the Y-Ce modified silicide coating was higher than that of the pure silicide coating. The wear tests demonstrated that the mass loss of the pure silicide coating was about two times larger than that of the Y-Ce modified silicide coating, indicating the beneficial effects of Y and Ce on the wear resistance of silicide coating.

Ultrasonic Welding Simulations for Multiple Layers of Lithium-Ion Battery Tabs

“…l(a). And the kinematic hardening model describes the evolution of backstress, a, as [25] .Mil )£ (5) where C and y are material related constants. Fig.…”

“…A significant amount of research indicates that the ultrasonic energy applied to workpieces removes oxide layers of the workpieces and reveals clean surfaces at the interface of the workpieces. Ultrasonic softening of the workpieces that helps form a joint then occurs [5]. Research also demonstrated that thermal conditions such as temperature play important role in achieving a successful ultrasonic weld [6,7], in particular the high-definition in situ temperature measurement of the welding process using thin-film thermocouples and thermopiles [8,9].…”

Multistimuli‐Responsive, Moldable Supramolecular Hydrogels Cross‐Linked by Ultrafast Complexation of Metal Ions and Biopolymers

“…Additionally, the CS–Ag hydrogel showed an irreversible response to oxidizing agents. Previously reports indicated that the chitosan could be decomposed slowly in the presence of hydrogen peroxide 20. With this in mind, a 30 % H 2 O 2 solution (30 μL) was added into the CS–Ag hydrogel (1 mL).…”

Characterization of Tribological and Mechanical Properties of the Si3N4 Coating Fabricated by Duplex Surface Treatment of Pack Siliconizing and Plasma Nitriding on AISI D2 Tool Steel

“…[6] The halide activated pack cementation (HAPC) method is widely used for improving surface properties of metals and alloys. [7,8] During HAPC, powders at high temperature react with the halide activators in order to form vapor of the coating compounds during the reaction with the substrate. The HAPC method enables the fabrication of metallurgical coating with good adhesion to the metallic substrate and effective coating thickness.…”

“…[10][11][12][13] Additional elements are added to the coatings for improving the intrinsic mechanical properties through complex hard compounds precipitation. [8,14] The coatings performances improve through further processing such as plasma nitriding. [1,15,16] Recently, siliconized layers deposited on AISI steels showed high wear and good pitting corrosion resistance.…”