ULTRA YUQORI MOLEKULYAR OG‘IRLIKLI POLIETILEN ASOSLI KOMPOZITLARDA MEXANIK VA ISHQALANISH XUSUSIYATLARINI OPTIMALLASHTIRISH
Keywords:
UHMWPE; nanofiller; tribological properties; friction coefficient; wear resistance; mechanical strength; carbon nanotubes; graphene oxide; nanocomposite; optimization.Abstract
This paper analyzes approaches to optimization of mechanical
(tensile strength, hardness, impact toughness) and tribological (friction coefficient,
wear rate) properties of UHMWPE-based composites. The concentration effect of
three reinforcing fillers - nano-SiO₂, multi-walled carbon nanotubes (MWCNT) and
graphene oxide (GO) - was studied at four loading levels (0.25–3.0 wt.%). Specimens
were produced by hot pressing and tested under pin-on-disk conditions at loads of 5–
20 N and sliding speeds of 0.1–0.5 m/s. The results show that incorporation of 1.0
wt.% MWCNT reduces the wear rate by 47 %, decreases the friction coefficient by
28 %, and increases tensile strength by 18 %. The optimal filler content was found to
lie in the range of 1.0–1.5 wt.%.
