The invention discloses a multi-element
carbide coating resistant to oxidation and abrasion at high temperature and a preparation method thereof. The
coating is composed of a CrY / CrYTiAl composite
transition layer and a (TiCrNbAlY) C functional layer, the atomic percent of the
C element in the functional layer is 40%-60%, and the atomic percent of the five
metal elements of Ti, Cr, Nb, Al and Y is 5%-12%. A multi-arc
ion plating technology is adopted for preparation,
argon is firstly introduced to deposit the composite
transition layer, and then
acetylene and
argon are introduced to deposit the functional layer. The thermal stress between the substrate and the
coating is effectively relieved through the composite
transition layer, and the
bonding strength is improved; the functional layer can form a compact
amorphous oxide layer and a single-phase high-entropy
oxide layer at high temperature,
oxygen diffusion is remarkably hindered, cracks are avoided, meanwhile, the
oxide layer plays a
solid lubrication role in the friction process, and excellent high-temperature
oxidation resistance and
wear resistance are shown. The coating is compact in structure, good in combination and suitable for various base materials such as stainless steel and high-temperature
alloy, and has wide application prospects in surface protection of high-temperature components in the fields of
aerospace, energy equipment and the like.