Article ID Journal Published Year Pages File Type
1657054 Surface and Coatings Technology 2015 10 Pages PDF
Abstract

•Wear and friction coefficient of PEEK coatings prepared by flame spraying process decreased with the adding h-BN particles.•h-BN content had a greater effect on the unmelted PEEK and surface roughness whereas the particle size of h-BN did not.•The self-lubricant property and the appearance of h-BN network structure in PEEK coating decreased the friction and wear.•The self-lubricant property and the appearance of network structure of h-BN in PEEK coating decreased the friction coefficient and specific wear rate.

Hexagonal boron nitride (h-BN) powder with different particle sizes and contents was incorporated in polyether ether ketone (PEEK) under ultrasonic conditions and deposited using flame-spray coating technique. Specific wear rate and friction coefficient of the h-BN/PEEK composite coatings were determined using a ball-on-disk sliding wear tester under applied loads of 5–25 N. Microstructure, microhardness, degree of crystallinity and surface roughness of the h-BN/PEEK composite coatings were investigated. The results showed that the microhardness and degree of crystallinity could be improved with h-BN particles. At an applied load of 5 N, the addition of h-BN particles into PEEK gave a lower specific wear rate. A higher content of h-BN added to PEEK coating resulted in a decrease in the friction coefficient. At an applied load of 25 N, 8 wt.% h-BN/PEEK composite coatings provided good friction reduction while the composite coatings formed severe wear with grooves.

Related Topics
Physical Sciences and Engineering Materials Science Nanotechnology
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