Impact Abrasive Wear Property of CrAlN/TiSiN Multilayer Coating at Elevated Temperatures

Abstract

The impact wear property of hard coatings at elevated temperatures is of particular interest for applications in nuclear power plants. This study evaluated the impact wear behavior of two CrAlN/TiSiN coatings with and without sand. Alternately grown CrAlN and TiSiN films with modulation periods of 455 and 19 nm were formed in a columnar structure. The nanomultilayer shows better impact wear resistance than multilayer films with and without sand. The energy absorption rate has a similar trend to wear rate, leading to lower rebound velocity and peak impact force of the nanomultilayer compared with that of the multilayer. CrAlN/TiSiN coatings can protect the 308L substrate from oxidation. The dominant impact wear mechanism without sand is plastic deformation, and this wear region can be defined as the percussive zone. Peeling occurs on the multilayer surface without sand after 104 percussions, leading to rapid oxidation of the 308L substrate at 500 °C. Due to the abrasion effect, the wear rate of the sample with sand increases by an order of magnitude compared to the sample without sand. The wear scar of the sample with sand can be divided into the mixing zone and the sand−affected zone from inside to outside. Fe oxides are formed beyond the unbroken coating, which may be related to the outward diffusion of Fe.

Structure and Properties of Wear-Resistant Nanostructured Coatings Based on W, Cr and N

“…Studies of wear-resistant coatings based on Ti-N, Zr-N, Mo-N and Cr-N coatings show their high hardness and excellent tribological characteristics. Such coatings are promising materials for wide application, for example, as protective coatings against rapid tool wear [1][2][3][4][5][6][7][8][9][10][11]. Along with this, the structure and tribological properties of W-N coatings have not been studied much.…”

“…A wide range of scientific research is devoted to the study of the material properties of nanostructured coatings with universal [13] and high wear-resistant characteristics [3,[14][15][16]. Among various coatings, nitride nanocomposite or nanolayer systems are studied quite widely [5,7,9,11,13,14]. Transition metal nitrides are considered as a protective coating due to their excellent properties in terms of hardness, wear resistance and corrosion resistance.…”

Improvement of Tribological Performance of TiAlNbN Hard Coatings by Adding AlCrN

“…Liew [ 21 ] showed that the multilayer AlCrN/TiAlN coated tool had higher delamination, abrasion and fracture resistance than the TiAlN single-layer coated tools. Recently, Y. Luo et al [ 22 ] showed that the multilayer coating of AlCrN/TiSiN with nanoscale modulation thicknesses possessed high plasticity index and impact wear resistance to abrasive quartz particles. Presently, there are only a few reports on multilayer coatings composed of TiAlNbN and AlCrN, and particularly their tribological performance has not been widely studied [ 10 , 16 ].…”