Effect of Ingredients on Mechanical and Tribological Characteristics of Different Brake Liner Materials

M P Natarajan1, B Rajmohan2, and S Devarajulu3
1.Department of Mechanical Engineering, Jerusalem College of Engineering, Chennai, India.
2.Department of Production Technology, Anna University, Chennai, India.
3.Rane Brake linings, Chennai, India.
Abstract— Asbestos possesses properties that are ideally suitable for use as a friction material in automotive and a number of other applications. Animal and human studies carried out since the early 1900s have established that asbestos is carcinogenic and that exposure to especially asbestos dust causes a large number of diseases. The search is, therefore, still on to find suitable substitutes for asbestos. A brake lining containing 14 ingredients was investigated to study the effect of ingredients on various aspects of friction properties. The composite was developed for a nonasbestos organic based friction material for an automotive brake system and contained typical ingredients for commercial brake friction materials. Two types of friction materials with different combinations were developed: (1) flyash range (10%-60%), and (2) without flyash based friction materials were investigated to study the effect of ingredients on the friction characteristics and wear. The main focus on the average normal coefficient, hot coefficient (Fade and recovery), wear loss, mechanical, as the function of the relative amount of the ingredient. The results also showed that the friction coefficient of fly-ash was better in the range of 0.35 to 0.48 when compared barites based brake linings and asbestos based brake linings. The materials such as potassium titanate (terraces), wollastonite, friction dust powder have strongly influence on friction coefficient. Wear resistance of the friction material was strongly affected by the relative amounts of ceramic wool, rockwool, calcium hydroxide, and zircon. The presence of glass fiber, twaron fiber, has increased the strength of the friction material. All these samples were tested on chase type friction tester at automobile ancillary unit.

Index Terms— Flyash, Braking lining material, Chase type friction tester, Mechanical, Friction, Wear

Cite: M P Natarajan, B Rajmohan, and S Devarajulu, " Effect of Ingredients on Mechanical and Tribological Characteristics of Different Brake Liner Materials," International Journal of Mechanical Engineering and Robotics Research, Vol.1, No. 2, pp. 135-157, July 2012.

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