Study on thermal and mechanical properties of yttrium tungstate-aluminium nitride reinforced aluminium matrix hybrid composites

Processing Methods and Mechanical Properties of Aluminium Matrix Composites

“…is may be due to the reduced amount of porosity by faster diffusion of metal under high compressive pressure during hot forging. An increase in hardness values of the hybrid composites was observed and the reasons for this are more elaborated in [9]. Moreover, the theoretical and experimental values of the composite were compared and experimental values were lower than the theoretical value that it was attributed due to the presence of porosities in the hybrid composites.…”

“…Advances in Materials Science and Engineering the cooled pure aluminium and the carbide reinforced composites were all lower than the virgin aluminium preforms. Moreover, Sethi et al [9] have manufactured AMCs using 30wt% Y 2 W 3 O 12 with 0, 5, 10, and 15wt% of AlN and 30wt% AlN with 0, 5, 10, and 15wt% Y 2 W 3 O 12 compositions. e composite powders were ball-milled for 10 hours at a speed of 300 rpm.…”

“…For example, AMCs reinforced with ceramic particles such as SiC, Al 2 O 3 , Y 2 W 3 O 12 , and AlN, with soft metallic materials such as Cu and high carbon steel chips powder, and with soft nonmetallic materials such as fly ash (FA) and aloe vera (AV) powder particles exhibit better mechanical properties than the unreinforced aluminium alloys. Besides, the material properties of AMCs can be enhanced by a cryogenic treatment which is advantageous since it is a low cost, simple, environmentally friendly, and nondestructive operation [3,4,[7][8][9][10][11]. However, problems arising from the inappropriate selection of processing methods, manufacturing techniques, incorrect selection of processing parameters (type, content, and particle size of the reinforcement and melting and sintering temperatures), and inappropriate selection of secondary manufacturing processes are broadly the possible difficulties encountered to get AMCs which are free of defects.…”

Effect of Quenching Medium on Sliding Tribology of Self-Lubricating Al-Cu Metal Matrix Composites

“…This lubricated the contact surfaces and hence decreased friction coefficient. The thermal mismatch between Al, Cu and mica led to generation of additional dislocation at their interfaces at the time of cooling [36,37]. High radial flux (heat flux) may lead to generation of large number of dislocations as compared to low radial flux which generates less dislocations [38].…”

“…This may be attributed to thermal mismatch between filler and matrix, and high radial flux in case of water quenched composites. High radial flux generated large number of additional dislocations, and due to thermal mismatch between mica and matrix, the interface was detrimentally affected [36,37]. Thus instead of generation of tribolayer, mica particles got debonded from the surface and ejected from the contact surfaces due to centrifugal forces provided by the rotating disc [40].…”