Effect of Metallurgical Factors on Corrosion Behavior of Al-SiCp Composites Fabricated by Powder Metallurgy

Abstract

The composites are classified as metal matrix composites, polymer matrix composites, and ceramic matrix composites. Many different matrices have been tried over the years in the MMC formulations but aluminum has been most exploited for compositing due to its low density and ease of fabrication. These composites have received considerable attention as a potential advanced material for application in automobile, aerospace, defense, and general engineering sectors. In this investigation, an attempt has been made to fabricate Al-SiC p composite material by powder metallurgy technique at different volume percentage of reinforcements (5, 10, 15, 20, and 25%). The corrosion behavior of the composite was analyzed using AC Gill potentiostat with 3.5 wt% NaCl medium. Four factors, five levels, and a central composite rotatable design matrix is used to minimize the required number of experiments. The effect of metallurgical factors on the corrosion behavior of the composite was analyzed. The factors include volume percentage of reinforcement, particle size, pH, and reverse potential.

An Investigation of corrosion of friction welded and post-weld heat-treated AA6061/SiC/graphite hybrid composites

“…For low pH values (i.e., acidic), the corrosion rate was larger. As far as volume percentage goes, the corrosion rate lowered due to the increase in the content of reinforcement [17]. Trzaskoma investigated the pit morphology of aluminium alloy and silicon carbide/aluminium alloy metal matrix composites.…”

Surface Modification of SiC Reinforcements & its Effects on Mechanical Properties of Aluminium Based MMC

“…In the present study liquid metallurgy process is adopted. Liquid metallurgy [1,2] process is the most economical method among spray deposition [3], powder metallurgy [4], liquid metal infiltration [5] and squeeze casting [6]. Wettability is the major problem in fabricating these materials and this is due to the presence of a film oxide at the surface of the aluminium [7].…”