چکیده مقاله
The study employed a copper free brake pad formulation containing ۲۰ ingredients, including binders, fillers, reinforcements, and friction modifiers Five sample batches S۱–S۵ were prepared with varying phenolic and cardanol resin ratios, molded under ۲۰ MPa at ۱۶۵ °C, followed by degassing and staged curing Tribological behavior was evaluated using two POD devices: one under mild wear conditions and another following SAE J۶۶۱ procedures Thermal stability was assessed via TGA–DTA, heating ۵۰ mg powders to ۸۰۰ °C at ۱۰ °C/min in air Results from the first and second fade–recovery cycles revealed that Sample ۲, containing ۱ wt % cardanol and ۷ wt % phenolic resin, exhibited the most favorable performance It maintained a stable coefficient of friction during fade and achieved near complete recovery, confirming excellent thermal mechanical balance and durability under repeated braking cycles In contrast, Sample ۵, with the highest cardanol content ۴ wt % , showed significant degradation, including sharp friction loss and poor recovery, attributed to thermal softening and reduced binder rigidity Disc temperature analysis classified all specimens within acceptable “N” and “H” friction categories, though Sample ۲ demonstrated the most consistent values across normal and hot conditions Microstructural observations indicated that higher temperatures increased wear rates, debris generation, and secondary plateau formation, partially covering primary pad material Thermal analysis TGA–DTA confirmed that phenolic resin and NBR decomposition dominated weight loss, while stable fillers such as BaSO₄, CaCO₃, Al₂O₃, and ZrSiO₄ enhanced resistance to rapid degradation Overall, limited cardanol incorporation ۱–۲ wt % optimizes fade & recovery behavior and high temperature stability in copper free brake pads
کلیدواژهها
نویسندگان
Milad Kazemi
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
Ali Mohammad Hadian
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
شیوه ارجاع
Kazemi، Milad و Mohammad Hadian، Ali،1404،Effect of phenolic and cardanol binders on the tribological and thermal properties of Cu-free Brake Pads،بیست و ششمین کنفرانس ملی مهندسی برق،کامپیوتر و مکانیک،شیروان
ارائهشده در
مجموعه مقالات بیست و هفتمین کنفرانس ملی مهندسی برق ،کامپیوتر و مکانیک24 شهریور 1404 · شیروان