Dry sliding wear behaviour of AA 6351-ZrB2 in situ composite at room temperature

Investigation of tribological behavior of AA8011-ZrB2 in-situ cast-metal-matrix composites

“…Halide salts of K 2 ZrF 6 and KBF 4 were taken to obtain the required composite proportions of weight percentage as per the literature 14,15,16,25 mixed and pre-heated at the temperature of 250°C for 30 min to remove the moisture. The preweighed AA8011 matrix was melted in the graphite crucible by using electrical resistance furnace and it was maintained at 850°C to convert it to molten form.…”

“…[14][15][16][17][18] The exothermic reactions that take place between molten form of aluminium and halide salts are shown in Equation (1), (2) and (3). After the completion of reaction, elements other than the ZrB 2 were evaporated or formed as slag was removed.…”

“…13 The in-situ technique has an advantage over other techniques such as the economical, uniform distribution of reinforcements, grain refinements, clear interface, good interfacial bonding strength between the matrix and reinforcement without the need of a wetting agent and a high degree of thermal stability. [14][15][16][17][18] From the literature, it was found that AMC's are fabricated with many reinforcements such as SiC, TiC, Al 2 O 3 , TiB 2 , ZrB 2 , in the form of oxides, carbides, nitrides, borides, fly ash, etc. 4,14,19 Among the reinforcements, ZrB 2 is a promising candidate with its excellent properties, such as high melting point (>3000°C), high hardness, chemical inertness against molten metal, high thermal shock resistance, high wear resistance, excellent covalent bond, high corrosion resistance, better thermal and electrical conductivity, which is much needed in the aerospace applications.…”

“…4,14,19 Among the reinforcements, ZrB 2 is a promising candidate with its excellent properties, such as high melting point (>3000°C), high hardness, chemical inertness against molten metal, high thermal shock resistance, high wear resistance, excellent covalent bond, high corrosion resistance, better thermal and electrical conductivity, which is much needed in the aerospace applications. [14][15][16][17][18] Generally, reinforced aluminium composites show superior tribological properties compared to the unreinforced aluminium alloy. 4,19 The wear behaviour of aluminium matrix composites reinforced with multi-walled carbon nano tubes was synthesized through the powder metallurgy technique.…”

Performance Evaluation of PCD Insert 1600 Grade on Turning of Al 6061 Reinforced with 7.5% ZrB2Metal Matrix Composite

“…The 6061 aluminum alloy has been used in automotive industry for the fabrication of parts which includes wheel, panels and vehicle structure [5] ZrB 2 is known to have many superior properties such as high melting temperature, hardness, corrosion resistance, oxidation resistance and electrical conductivity, being used for aircraft / rocket components working at special high temperature, cutting tools and cathode material for aluminum refinement furnace [6]. Production of in-situ metal matrix composite by flux assisted synthesis was widely reported in the literatures [7][8]10].…”