Wear mechanism of Ni–P–BN(h) composite autocatalytic coatings

The effect of incorporated self-lubricated BN(h) particles on the tribological properties of Ni–P/BN(h) composite coatings

“…This structure is similar to that of graphite and molybdenum disulfide (MoS 2 ), which are highly successful solid lubricants, and the mechanism behind their effective lubricating performance is understood to be owing to easy shearing along the basal plane of the hexagonal crystalline structures [23]. Leŏn et al [19][20][21][22] investigated the wear mechanism of Ni-P/BN(h) autocatalytic coatings that deposited on AISI 316L stainless steel and found that the addition of BN(h) particles, with an average particle size of 5.16 µm, could reduced friction and wear. Their results showed that the frictional and mechanical properties of the composite coatings were affected by the BN(h) particle content in the coating and the composite coating which contained approximately 35% BN(h) exhibited the lowest friction coefficient of 0.…”

“…In order to improve further the properties (mechanical and tribological) of electroless Ni-P coatings, numerous composite coatings based on electroless nickel-phosphorus matrix are investigated. By co-deposition of hard particles such as Al 2 O 3 , B 4 C, WC, SiC and SiO 2 [6][7][8][9][10][11][12][13], higher hardness and improved wear resistance are obtained, and, by incorporation of such soft particles as PTFE, graphite, MoS 2 , carbon nanotube, and hexagonal form of boron nitride (BN(h)) [14][15][16][17][18][19][20][21][22], the friction coefficient of electroless Ni-P coatings is modified. Vojtěch et al [6] investigated the sliding wear behavior of electroless Ni-P/Al 2 O 3 and Ni-P/SiC coatings deposited on an aluminium-silicon casting alloy.…”

“…Their results showed that the frictional and mechanical properties of the composite coatings were affected by the BN(h) particle content in the coating and the composite coating which contained approximately 35% BN(h) exhibited the lowest friction coefficient of 0. 22. In addition to the amount of particle co-deposited in the composite coatings, increased performance of the composite materials can only be recognized if the incorporated are well dispersed in metal matrix, which depends upon the nature and type of particle to be codeposited, particles size and zeta potential, bath type etc.…”

Development of self-lubricating composite materials of nickel with molybdenum disulfide, graphite and hexagonal boron nitride processed by powder metallurgy: preliminary study

“…The deposition of fine particles of h-BN (combined with other components) without the aid of an external potential (electroless) has been used as coating on metallic substrates from parts of mechanical structures to form a self-lubricating and high wear resistance surface. Léon et al [6][7][8] while studying composite layers of Ni-P-(h-BN) obtained by electroless deposited on AISI 316L steel presents a promising future of these types of self-lubricating composites.…”

High-Temperature Friction and Wear of Ag/h-BN-Containing Ni-based Composites Against Steel

“…Some studies [9,10] have been conducted on the use of hBN in wear resistant coatings, but its potential as a lubricant in P/M materials has not yet been fully explored.…”