Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

Browse

Subject: search.filters.subject.MMCs

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Effect of volume fraction and particle size of reinforcement on thermal analysis and heat transfer parameters of gravity die cast hypereutectic Al-22% SI alloy matrix composites
    (2006) Subramanya, P.K.; Hegde, S.; Prabhu, K.N.
    The properties of cast metal matrix composites are largely dependent on the solidification behaviour which is dictated by the thermophysical properties of the melt, mould and the interfacial heat transfer from the metal to the mould. In the present investigation the thermal analysis parameters and heat transfer aspects of hypereutectic aluminium alloy matrix composites were studied. As the vol% of SiC p increases the total solidification time decreases and the cooling rate increases. The morphology of the primary silicon was very much dependent on the presence of SiC p. The estimated peak heat flux for the composites are lower than matrix alloy melts solidified under similar conditions. The particle size has a negligible influence on the cooling behaviour. However, composite with finer particle size shows slightly higher peak heat flux.
  • No Thumbnail Available
    Item
    Effect of SiC Reinforcement on Microstructure and Mechanical Properties of Aluminum Metal Matrix Composite
    (Institute of Physics Publishing helen.craven@iop.org, 2018) Ajagol, P.; Anjan, B.N.; Marigoudar, R.N.; Preetham Kumar, G.V.
    Aluminum reinforced with silicon carbide composites areextensively used in automobile industries and aerospaceowing to their favourable microstructure and improved mechanical behaviour with respect to pure aluminium but at a lower cost. Aluminium is remarkable for the low density and its ability to resist corrosion. The aim of present study istoevaluate the mechanical and microstructural properties of aluminum with silicon carbide (average particle size 30-45μm) reinforced in varying weight percentages (wt %) ranging from 0-15 wt% in a step of 5% each. Ultimate tensile strength, micro hardness and density of the fabricated composites were investigated as a function of varying SiC wt%. Microstructure analysis was carried out on casted composites using optical microscopy and scanning electron microscopy. From micrographs it is clear that fair distribution of reinforcing particles in the matrix and also observed some clustering and porosity in the cast material. Results revealed that, the addition of SiC reinforcement in the aluminum matrix increases the hardness and ultimate tensile strength gradually from 23 HV to 47 HV and 84 MPa to 130 MPa respectively. © Published under licence by IOP Publishing Ltd.
  • No Thumbnail Available
    Item
    Influence of sic and al2o3 particulate reinforcement on the mechanical properties of za27 metal matrix composites
    (Trans Tech Publications Ltd ttp@transtec.ch, 2019) Anjan, B.N.; Preetham Kumar, G.V.
    Zinc aluminum based matrix composites reinforced with SiC and Al2O3 particles have significant applications in the automobile field. Stir casting method followed by squeeze process was used for fabrication. ZA27 composites reinforced with SiC and Al2O3 particles (20-50µm) in various weight percentage (wt%) ranges from 0-10 in a step of 5 each was fabricated. OM, SEM and EDS analysis of microstructures obtained for matrix alloy and reinforced composites were performed in order to know the effect of varying wt% on physical and mechanical properties of composites. Squeeze casting technique shows better features such as fine microstructure as a result of low porosity and good bonding between matrix and reinforcement. Addition of reinforcements decreased the densities of matrix alloy. SiC reinforced composites showed better results as compared with Al2O3 reinforced ones. Hardness and ultimate tensile strength value of 10 wt% reinforced composites showed improved results. © 2019 Trans Tech Publications Ltd, Switzerland.