Electroless Composite Nickel Coatings Strengthening with TiN Nanoparticles Plated on Ductile Cast Iron

Abstract

Electroless nickel (Ni) and composite nickel coatings (Ni+TiN) are investigated in this study. EFFTOM -Nickel Method for electroless nickel plating is applied. Nanosized TiN particles (50nm) are used as a strengthening material. The coatings are plated on ductile cast iron samples. The wear tests of the coatings by the classic model TABER ABRASER “disc to disc” are carried out. The observation of the samples microstructure by means of an optical metallographic microscope GX41 OLIMPUS and the microhardness measurements by Knoop Method are performed. The wear resistance, the thickness and microhardness of the samples before and after thermal processing at 290°C, 6 h are defined.

Surfacing – Technologies and Layer Properties (A Review)

“…The first one involves the introduction of powder material into the heated zone [30], [31], [32], [33], the second assumes the remelting of a precoat [35], [36], [37] [39] and the third uses a gaseous medium to introduce the necessary components [34]. Another possibility to produce the layer is electroless cladding (ELC) from a solution and subsequent thermal treating [40], [41], [42]. The specific in this case is that no heating is required for the deposition of the bed, and the thermal treatment is at relatively low temperatures (2900C).…”

“…In the publications reviewed, the materials used as substrates can be divided into the following main groups: carbon steels [3], [6], [7], [12], [13], [15], [16] 17, 18, 21, 25, 26, 29, 36 and 37; alloyed steels [1], [4], [8], [9], [20], [22], [24], [30], [41] and [42]; highly alloyed steels [5] and [32]; aluminium and aluminium alloys [11], [28], [39], [43], [44] and [45]; titanium and titanium alloys [23], [31], [34] and [35]; ductile cast iron [33] and [40]. The SAS, MIG / MAG, TIG, PST, EBS and LS methods were used to apply the layers to carbon steels.…”

“…When layers are depositing on highly alloyed chromium-nickel steels [32] with the use of nickel and iron-based powders, the Vickers hardness is 460 MPa at the surface of the bed and decreases to 250 MPa at the base metal boundary (layer thickness is 0.5 mm). The deposition of layers by electroless method is realized in [40] ÷ [42]. The method consists of depositing a nickel layer followed by deposition of a layer containing a hardening phase -TiN or a detonating nano diamond.…”

Friction of Ultra-High-Molecular-Weight Polyethylene, Modified With Carbon Nanotubes

“…One of the methods for reducing friction and wear is the development of new composites and coatings with physicomechanical characteristics and properties, providing low tangential stresses and high 16th International Conference on Tribology -SERBIATRIB '19 wear resistance of friction contacts. A specific feature of the tribological processes is that they occur in the thin surface layers of the contacts, they depend significantly on the operating modes and they change over time [6][7][8][9][10].…”