Thermal Analysis of Ni-Cu Alloy Nanocomposites Processed by Sand Mold Casting

Thermal Analysis of Ni-Cu Alloy Nanocomposites Processed by Sand Mold Casting J. Kumaraswamy Department of Mechanical Engineering, RL Jalappa Institute of Technology (Visvesvaraya Technological University Belagavi, Doddaballapur 561203, Karnataka, India https://orcid.org/0000-0003-4264-4763 Vidyasagar Shetty Department of Mechanical Engineering, NMAM Institute of Technology- Affiliated to NITTE (Deemed to be University), Nitte 574110, Karnataka, India https://orcid.org/0000-0001-5758-1289 S. Sanman Department of Mechanical Engineering, Acharya Institute of Technology, Bengaluru 560107, Karnataka, India https://orcid.org/0000-0003-4210-4038 Premkumar Naik Department of Mechanical Engineering, AMC Engineering College, Bengaluru 560083, Karnataka, India https://orcid.org/0000-0002-1089-5667 Shabari Shedthi Department of Computer Science and Engineering, NMAM Institute of Technology- Affiliated to NITTE (Deemed to be University), Nitte 574110, Karnataka, India https://orcid.org/0000-0003-2723-7641 C. Gnanavel Department of Mechanical Engineering, Vels Institute of Science, Technology and Advanced Studies, Chennai 600 117, India https://orcid.org/0000-0002-1242-851X Ibsa Neme Mogose Department of Chemical Engineering, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia https://orcid.org/0000-0002-0822-248X V. Vijayan

Ni-Cu based alloy metal matrix nanocomposites are in great demand for advanced technological applications due to their high temperature, strength, and better thermal properties. The aim is to investigate the thermal conductivity and coefficient of thermal expansion of the nickel based alloy nanocomposites reinforced with titanium dioxide (TiO2) which varies from 3 to 12 weight % nanoparticulates (45 to 60 nm). The thermal conductivity was measured using a comparative cut bar method (ASTM E1225), and thermal expansion was analyzed using a push-rod dilatometer method (ASTM E228). From experimentation, it was observed that thermal conductivity of the nanocomposites activity increases with inclusion of the nanoparticles up to 9 weight % after descent due to the temperature effects in nanocomposites, and thermal expansion of the nanocomposites decreases with addition of the nanoparticles up to 9 weight % and further rises marginally due to ductility of composites. Due to the incorporation of hard ceramic particles into the matrix, the composites’ thermal conductivity increases to 57.42 W/m ℃ , and their thermal expansion decreases to 12 × 10−6. Nickel alloys are widely used in marine, automotive, valve, pump, and aircraft applications.
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