Wear resistant solid lubricating coatings via compression molding and thermal spraying technologies
نویسندگان
چکیده
This work combines two industrially friendly processing methods in order to create wear resistant and solid-lubricating composite coatings potentially suitable for high load applications. Layered were fabricated over wrought stainless steel 444 (SS444) by compression molding a mixture of solid lubricant polymer, polytetrafluoroethylene (PTFE, 80 wt%), polyimide (PI, 20 onto iron aluminide (Fe3Al) thermal spray without the need either primers or adhesives. The fabrication process consisted three main steps: deposition Fe3Al coating SS444 substrate transfer into metal mold; transfer, compress, sinter mixed polymeric powder coating; finally, sample cooling room temperature. method takes advantage surface roughness coatings, which increases mechanical adhesion slippery PTFE underlying metallic material. Coatings produced with small amount graphite (5 wt%) analyze its impact on sliding properties. Unlike current technologies, thickness presented herein can be easily quickly tailored varying polymer added mold prior grinding after fabrication. We analyzed ~1.3 mm total that portray coefficient frictions ~0.1, similar pure PTFE. calculated rates both are an magnitude lower than what has been previously reported composition. influence properties was found minimal due content self-lubricating yet act as way material costs increase capacity.
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ژورنال
عنوان ژورنال: Surface & Coatings Technology
سال: 2021
ISSN: ['1879-3347', '0257-8972']
DOI: https://doi.org/10.1016/j.surfcoat.2021.127790