Friction and wear properties of basalt fiber reinforced/solid lubricants filled polyimide composites under different sliding conditions

Abstract

Short basalt fibers (BFs)-reinforced polyimide (PI) composites filled with MoS 2 and graphite were fabricated by means of hot-press molding technique. The tribological properties of the resulting composites sliding against GCr15 steel ring were investigated on a model ring-on-block test rig. The wear mechanisms were also comparatively discussed, based on scanning electron microscopic examination of the worn surface of the PI composites and the transfer film formed on the counterpart. Experimental results revealed that MoS 2 and graphite as fillers significantly improved the wear resistance of the BFs-reinforced polyimide (BFs/PI) composites. For the best combination of friction coefficient and wear rate, the optimal volume content of MoS 2 and graphite in the composites appears to be 40 and 35%, respectively. It was also found that the tribological properties of the filled BFs/PI composites were closely related with the sliding conditions such as sliding speed and applied load. Research results show that the BF/PI composites exhibited better tribological properties under higher PV product.

Eco-friendly mono-layered PTFE blended polymer composites for dry sliding tribo - systems

“…The average value of 4.9 x 10 -9 (mm 3 /N-m) specific wear rate was found in the layered composite. This value was found to be significantly lower compared to some other values in the published work [44][45][46]. The specific wear rate of 13 x 10 -6 and 3.5 x 10 -6 (mm 3 /Nm) was noticed for the basalt fabric/phenolic and short basalt fiber/ PI composites respectively that was found to be significantly higher than the specific wear rate of layered composites.…”

“…Only half the value of friction coefficient was observed in the case of layered composite which was found to be significantly lower than the plain basalt fabric/phenolic resin composite [44]. Further, the short basalt fiber/PI thermoplastic composite [46] also showed higher friction coefficient compared to the friction characteristics of PTFE blended basalt fabric reinforced vinyl ester composite. As reported, the addition of graphite and MoS 2 with higher filler content to basalt fiber/PI composites can also exhibit higher friction value than the layered composite [45].…”

“…Similarly, some of the other works [45,46] also be exhibited higher friction behavior for short basalt fiber reinforced composites in polyamide (PI) matrix. These thermoplastic based basalt fiber reinforced composites were fabricated using the expensive techniques like hot compression or injection moulding process thus increasing production cost of composites.…”

Ultraviolet or atomic irradiation effect on the polyimide composite lubricating coating

“…A growing area of material research has been devoted to the fabrication of solid lubricant modified materials, where the excellent tribological properties of the solid lubricants are combined with the polymer matrix. Some solid lubricants such as MoS 2 can improve the friction reducing and the antiwear ability of PIs [3][4][5][6][7][8]. Ye et al [9] found that the filler nano-LaF 3 was able to enhance the compactness of the frictional surface, and resulted in an improvement of the wear-resistance property of the MoS 2 lubricating film.…”

Preparation of polyimide-graphite composite and evaluation of its friction behavior at elevated temperatures

“…To solve these problems, many researchers have conducted a lot of studies. It is generally accepted that the improvement in the good lubricating performance of PI is based on the incorporation of polymer matrix and inorganic fillers such as nanoscale clay powder [17], short carbon fiber, micron SiO 2 [18], CaCO 3 [19], kaolin [20], graphite [21][22][23], and so on. It is worth noting that graphite (GR) is an interesting lubricating material that has been widely applied in industrial fields [8,[24][25][26].…”