US EPA

6872631 

Journal Article 

Friction and wear studies on the aramid fibre based non-asbestos brake pads for wind-mill application 

Ranganathan, V; Konchady, G; Krishnapillai, S; , 

2010 

TRANS TECH PUBLICATIONS LTD 

DURNTEN-ZURICH 

101-+ 

10.4028/www.scientific.net/AMR.123-125.101 

WOS:000289269600024 

The increasing demands for indigenous non-toxic friction material for wind mill application with better braking properties is ever expanding and this has motivated the development of non-asbestos brake pads. As an alternative to asbestos friction materials, aramid fibre reinforced phenolic matrix friction composite was developed with fibre content varying from 0 to 7 wt %. Using pin type specimens, their friction and wear behaviour was evaluated against cast iron disc in a pin on disc testing apparatus. The test results at a constant load of 70 N and at two speeds of 1.5 m/s and 5 m/s showed that the coefficient of friction decreased with fibre content and sliding velocity, almost linearly. The wear rate also decreased with increase in fibre content but was following a polynomial relation of third order. A composition which gives frictional coefficient of 0.45 to 0.40 and a minimum wear rate is desirable for the application. The formulation containing 5 wt % aramid fibre exhibited friction in this range and its wear rate was almost closer to the minimal value. Hence, from friction and wear considerations an aramid fibre content of 5 wt % is ideal for this application. 

978-0-87849-246-6 

3rd International Conference on Multi-Functional Materials and Structures 

Jeonju, SOUTH KOREA