TITLE:
Development of Iron Based Brake Friction MMC Used for Military Aircraft Application by A New P/M Route
AUTHORS:
Mohammad Asif, K. Chandra, P.S. Misra
KEYWORDS:
brake pad; heavy duty Aircraft brakes; Powder Metallurgy.
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.10 No.8,
June
27,
2011
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
P/M industries.
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.