Friction and wear properties of friction materials containing nano/micro-sized SiO₂ particles

Abstract

Purpose – Among the components used for a car brake lining, the chemical and structural properties of the abrasives, jointly with the morphology and size of the particles influence the friction parameters and stability of the composite. This paper aims to investigate the effect of nano SiO2 particles in brake pads on friction and wear properties. Design/methodology/approach – In this paper, the effects of SiO2 (Silica) particles of varying size on the friction-wear properties of polymeric friction composites are investigated. Four friction composites were prepared containing (5, 10 Wt.%) micro silica (MS) particles and (5, 10 Wt.%) nano silica (NS) particles. The samples were produced by a conventional procedure for a dry formulation following dry-mixing, pre-forming and hot pressing. Friction and wear characteristics of the specimens against to a disk made of cast iron were studied. Friction coefficient, specific wear rate and hardness of specimens were obtained. Detailed examinations on the worn surface were analyzed using a scanning electron microscope. Findings – The results of test showed that the inclusion of nano silicon carbide (SiC) powder improved the wear performance significantly. Friction coefficient (μ) of NS samples was higher than the MS samples. Micro-SiC showed poor performance and μ. High wear performance was exhibited in materials containing 5 Wt.% NS and 10 Wt.% NS. Originality/value – This paper emphasizes the importance of nano-composites in the automotive industry and helps to industrial firms and academicians working on wear of materials.

Investigation of the Effect on Tribological Properties of the use of Pinus Brutia Cone as a Binder in Brake Pads

“…where V is the specific wear ratio (cm 3 /Nm), R is the distance between the centre of specimen and the centre of the rotating disk (m), n is the rev of the rotating disk (rev/min), m 1 and m 2 are the average weights of specimen before and after the test (g), ρ is the density of the brake lining (g/cm 3 ), and f m is the average friction force (N) [12][13][14][15][16].…”

Predicting and analyzing of tribo-performance of NAO friction composites using Taguchi method

“…Simultaneously, increasing the sliding velocity also increases the frictional temperature at pairing surfaces. Generated heat during friction process increases interface temperature, which is resulting in decrease in friction coe cient [25].…”

Kolemanit ve Boraks Takviyeli Fren Balatalarının Sürtünme Performansı

“…Bu durumda bir yapışma bir bırakma hali sürekli tekrarlanır, bu da sürtünme katsayısında sürekli artma ve azalmaya neden olur. Numunelerin brinell sertlik (HB) ve yoğunluk değerleri (g/cm 3 Literatürde sürtünme katsayısı (µ) 0.1 ila 0.7 arasında, sürtünme kuvveti ve disk-balata ara yüzey sıcaklığına bağlı olarak değiştiği görülmektedir [25][26][27][28]. Sürtünme-aşınma testlerinden elde edilen sonuçların, literatürde yapılan çalışmalara paralel ve TS 555'e uygun olduğu saptanmıştır.…”