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Indian Institute of Technology (IIT) Roorkee 
Iron based/copper based cerement friction materials/composites/brake elements with built-in backing plates 
P.S Mishra, Kamlesh Chandra and Lenin Singaravelu 
Indian Institute of Technology (IIT) Roorkee 
Application type:
Granted - 2014-04-30 
Application Number:
Applied at:
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Indian Institute of Technology (IIT) Roorkee 
For the production of metal based brake pads the only technology available today is the powder metallurgical shaping technology using compacting and sintering of powders. Here, a numerous problems are encountered namely heavy rejection of final products due to shrinkage and warpage attributed to heavy compaction pressure and high sintering temperatures, limited die life due to appreciable wear of the die, and limited density of the product due to residual porosity. Further, the powder characteristics severely control the properties of the final sintered product and also the processing parameters. Additionally, compacting and sintering requires costlier equipments. Therefore, it is thought to give away present compacting and sintering techniques and to develop an alternative technique to get rid off the complications of this process. The manufacturing technique for disc brake pads using “hot forging of powders”, which is being developed in the present investigation shall completely eliminate compacting and sintering and results in the improved performance at significantly reduced cost. Hot powder forging aims at simultaneous application of pressure and temperature and is predominantly deformation based consolidation technique which offers better densification, redistribution of impurities inside the matrix to yield more homogenous product.  

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