ABSTRACT A new P/M route based hot powder pre-form forging process has been evolved to develop high
density brake materials for heavy duty applications. Number of iron based MMC’s so developed
offer better characteristics for braking applications in comparison to the materials developed
through conventional P/M route based on high pressure compaction and pressure sintering. The
process so developed in the present investigations is much simpler and easy to adopt by existing
Hot powder pre-form forging technique for making heavy duty brake pads offers better
opportunity for pore free material with better bonding between various metallic and non-metallic
constituents. After conducting an initial characterization such as hardness, density and Pin-on
Disc tests, the samples were tested for high energy (32,933kgfm) on Sub-scale dynamometer
under Rejected Take Off conditions. The results have also been compared with respect to brake
pads employed in heavy duty Military aircraft tested under identical laboratory conditions. The
present work indicates that the newly developed materials compare better than the one being
currently employed in heavy duty aircraft. The reasons for better performance are improved
processing technique and resulting higher levels of density and improved binding of the product.
Cite this paper
M. Asif, K. Chandra and P. Misra, "Development of Iron Based Brake Friction MMC Used for Military Aircraft Application by A New P/M Route," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 8, 2011, pp. 693-705. doi: 10.4236/jmmce.2011.108054.
 Anderson, A. E., 1992, ASM Handbook, Vol.18, pp569-577, Materials park, OH.
Hausner, H., 1970, Vol.4, pp61-72 & pp123-137, Perspectives in Powder Metallurgy, Friction and Anti-friction materials, Plenum press, New York.
Nadezda, M. et. al., 2000, Materials Letters Vol.46, pp255–260.
So H., 1996, Tribology International Vol.29, pp415-423.
S. D. Lenin., Chandra K., Misra P. S., 2009, “New Processing Technology for the Manufacture of Heavy duty Metallo-Ceramic Brake pads” Powder Metallurgy, p6.
Misra P. S., Chandra K. “Development of High Temperature Oxidations Resistant Glassy Coating” Indian Patent, application No. 153/DEL/2010 dated Jan. 27, 2010.
S. D. Lenin., Development of friction materials through powder metallurgy, 2008. Ph.D. Thesis, Indian Institute of Technology Roorkee (INDIA).
Asif M., Chandra K., Misra P. S., 2010 “Characterization of hot powder preform forged Iron Based brake pads for heavy duty applications” paper under review ASME Journal of Tribology, No TRIB-10-1178.
Asif M., Chandra K., Misra P. S., 2010, “Microstructure and Mechanical Properties of P/M Processed steel used in brake pads for heavy duty applications by hot powder preform Technique.” Paper accepted and will be published in Material science and Engineering- A, Elsevier journal, for Third International Conference on Recent Advances in Composite Materials, ICRACM-2010 France (December 13-15, 2010).