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In the present study, porous titanium based composite has been developed by powder metallurgy route using cenosphere and sodium chloride (NaCl) as space holders. The effect of cenosphere particle size and sintering parameters on density, microstructure, wear and corrosion resistance has been studied. The microstructure of the composite consists of uniform distribution of cenosphere in a-Ti matrix with the presence of few TiO 2 and SiO 2 phases. The density of the composites varies from 1331 to 1812 kg m 23 . The kinetics and mechanism of fretting wear against hardened steel ball (at an oscillation frequency of 10 Hz) as a function of applied load (5 and 10 N) have been studied. There is a significant reduction in coefficient of friction in porous composite as compared to that of pure titanium. There is improvement in corrosion resistance in porous titanium composites as compared to as received titanium in 3.56 wt-% NaCl solution.

In the present study, the mechanical properties in terms of nano and microhardness and compressive strength of aluminium cenosphere composite foam (CF) developed by powder metallurgy route was carried out. The CF was developed under a varied compaction pressure between 125 MPa and 375 MPa, and sintered by two step sintering (step 1: heating at 400 ºC for 1 hrs. and step 2: heating at 700ºC for 2 hrs.) with a cenosphere content varying from 5 vol.% to 50 vol.%. The effect of process parameters and cenosphere content on microstructure, porosity and its distribution, microhardness and nano mechanical properties was undertaken. Finally, the compressive behavior of the Al-cenosphere composite foam processed under varied compaction pressure and with varied cenosphere content was evaluated.