Tailored Porosity for Polymer Infiltration in Stainless Steel Coatings

Nascimento, Alexandre Romão Costa; Devaraj, S.; Francelin, Alan Polato; Savoie, S.; Schulz, Robert; Moreau, Christian

doi:10.1007/s11666-019-00884-y

Cited by 2 publications

(2 citation statements)

References 35 publications

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“…Future engineering applications are directed to surface protection of two types of components; first are metallic foams or 3-D printed structures that could be impregnated with polymers, second are porous coatings made by thermal spray or others. For example, using acid leaching, Nascimento et al [20] tailored porosity of a stainless steel coating made by high-velocity oxygen fuel spray for further step of polymer infiltration. Here, using pre-fabricated, commercially available porous metal networks, we investigate infiltration process, thermal and mechanical properties of the BMI+Gr composites, as well as tribological behaviour of each composite layer, with focus placed on development and stability of lubricating transfer film and tribofilm at the contact.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing and Tribological Behavior of Self-Lubricating Duplex Composites: Graphite-Reinforced Polymer Composites and Polymer-Infiltrated Metal Networks

Zhang

Chern

Schulz

et al. 2020

J. of Materi Eng and Perform

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Self-lubricating duplex composites comprising a top layer of polymer-based composites, i.e. bismaleimide (BMI) filled with a wide range of graphite (Gr) content (0-55 wt%), and a bottom layer of infiltrated metal-networks were manufactured by a hot compression-molded method.Melting points and polymerization temperatures of as-received BMI powder and BMI+Gr blends were investigated to determine infiltration process. The polymerization peaks are pushed to higher temperatures with graphite content. For cured polymer composites, the hardness measured by nanoindentation keeps increasing with the graphite content up to 55% without degradation.Tribological performance of the top and bottom composites are examined individually, with focus placed on the development and stability of lubricating transfer film and tribofilm. For the top polymer composites, 25 wt%Gr (or equivalently 17 vol%) is sufficient to form lubricating transfer film and reduces the friction to the lowest ~0.15. For the bottom infiltrated metal-networks, the BMI+55%Gr-infiltrated network is adequate to develop fully covered transfer films and achieve low friction throughout the test. Those results shed lights on design and manufacturing of selflubricating polymer matrix composites on metallic components that undergo severe running conditions.

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Section: Introductionmentioning

confidence: 99%

Manufacturing and Tribological Behavior of Self-Lubricating Duplex Composites: Graphite-Reinforced Polymer Composites and Polymer-Infiltrated Metal Networks

Zhang

Chern

Schulz

et al. 2020

J. of Materi Eng and Perform

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“…[44] This chemical analysis is in agreement with Fe3Al HVOF coatings that have been previously reported. [45] Although Fe3Al HVOF coatings portray high adhesion and strength, low porosity, and hightemperature erosion resistance, [46] they show poor wear resistance at room temperature (k ~ 10 −3 to 10 −4 mm 3 /Nm) and high COF (>0.8). [47,48] Hence, the addition of hard ceramic fillers such as TiC, [48] TiB, [47] and WC [46] have been implemented to improve wear rates.…”

Section: Fe3al Thermal Spray Coatingsmentioning

confidence: 99%