Elevated temperature tensile properties of squeeze-cast Al-Al2O3-MgO particulate MMCs up to 573 K

Effect of Squeeze Pressure on Aging and Mechanical Properties of AA2218-5 Wt Pct Al2O3 (TiO2) Composites

“…Heat-treated Al 2 O 3 and TiO 2 powders were put in the ball mill having a stainless steel container and 50 stainless steel balls of different sizes ranging from 2.5-to 10-mm diameter and rigorously agitated for 30 minutes; the idea was to coat coarser Al 2 O 3 particles with finer TiO 2 particles on the surface in order to promote wetting of alumina. Similar study was done by Singh et al, [18] where coarser alumina particles were coated with finer MgO particles and improvement in wettability of alumina particles was observed. On the basis of rough calculation of TiO 2 particles (size 53 lm) required to coat spherical Al 2 O 3 particles (size 75 lm), the mixture of powders in the ratio of 1:2 (Al 2 O 3 :TiO 2 ) was taken for milling.…”

“…Different approaches such as alloying and coating have been employed to overcome the adverse surface forces by promoting wettability. In an earlier study, [18] coarse Al 2 O 3 particles were coated with finer MgO particles to improve wetting. In the present study, a similar technique has been used by replacing MgO with TiO 2 , so that there could be reactive wetting due to reduction of surface-coated TiO 2 by molten aluminum.…”

“…Background METAL matrix composites (MMCS) based on aluminum and its alloys have often been discontinuously reinforced by external addition of ceramic particles such as Al 2 O 3 , [1][2][3][4][5] TiO 2 , [1,[6][7][8][9][10][11] SiC, [12][13][14][15] TiC, [16] Illite, [14] TiB 2 , [17] Saffil, Shell-char, ZrO 2 , [6] MgO, [18] Mica, etc. A variety of particle reinforcements including Al 2 O 3 , AlN, [19] SiC, [20] TiC, TiN, TiB 2 , [21] TaC, and TiAl 3 [1] have been generated in situ by promoting chemical reaction during processing of composites.…”

Elevated Temperatures Tensile Characteristics of Cast A356/Al<sub>2</sub>O<sub>3</sub> Nanocomposites Fabricated Using a Combination of Rheocasting and Squeeze Casting Techniques

“…However the mechanical characteristics of Al-based MMCs reinforced with microsize ceramic particulates at elevated temperatures was extensively studied [15][16][17][18][19][20], only limited data on the elevated temperatures bebaviour of Al-based nanocomposites are available. Until now the elevated temperatures mechanical properties for such nanocomposites were not sufficiently determined and published.…”

Influence of nanosized Al2O3weight percentage on microstructure and mechanical properties of Al–matrix nanocomposite

“…7 Most studies on powder metallurgy (PM) MMCs concentrated on a composite with high strength aluminium matrix. [7][8][9][10][11][12][13] Lai and Chung 14 presented one of the very few papers on MMC using pure aluminium as a matrix. In their work, the MMCs were manufactured by vacuum infiltration of liquid aluminium into a porous particulate perform under inert gas.…”