Wear behaviour of Fe₃ Al intermetallic particle reinforced PM based iron metal matrix composites

Authors: Venkateswaran, K.; Kamaraj, M.; Rao, K. P.

Source: Powder Metallurgy, Volume 49, Number 4, December 2006 , pp. 374-379(6)

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Abstract:

The wear behaviour of unreinforced and reinforced PM based iron metal matrix composite, the latter containing 10 and 20 vol.-% nano sized Fe₃Al intermetallic particles, was studied as a function of sliding distance under two different loads and dry lubricated conditions. The intermetallic Fe₃Al nanoparticles were prepared by mechanical alloying and used as particle reinforcement with 10 and 20 vol.-% in the matrix. The processing of the composites included mixing and cold compaction followed by sintering at 1120°C. The influence of Fe₃Al additions on the dry sliding wear behaviour was studied at loads 20 and 40 N over sliding distances 2160, 3240, 4320 and 6480 m. The study showed that the composite exhibited a lower wear rate than that of the unreinforced matrix and the wear rate was influenced by the volume percentage of Fe₃Al particles. It is understood that iron aluminide reinforcement has a beneficial effect on the wear properties. Delamination and microcutting were the chief mechanisms of wear for the composites.

Keywords: SLIDING WEAR; POWDER METALLURGY; METAL MATRIX COMPOSITE; IRON ALUMINIDE; DELAMINATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174329006X113490

Publication date: 2006-12-01

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