The Effect of adding TiO2 Nanoparticles in Aluminum Silicon through the Stir Casting Process Johan Wayan Dika, Salnan Sabdo Wibowo, Mashudi, and Abi Suwito
Nahdlatul Ulama University of Blitar
Abstract
Aluminum Silicon is an alloy material whose usefulness can be used in various automotive applications and the aerospace industry. With the potential for extraordinary abilities such as cast ability, abrasion resistance, and excellent strength, it makes this material to be continuously carried out in engineering research. One of the engineering efforts is to add nanomaterials to a liquid aluminum silicon alloy. As it is known that nanotechnology is becoming familiar and research continues in recent times. This is because nanotechnology is able to present better mechanical properties than before. Titanium dioxide (TiO2) is one of the nanoparticles that will be used in this research. The use of nanomaterials is based on the properties that are able to add tensile strength to aluminum silicon alloys. This research begins with conducting a needs analysis, purchasing materials, smelting processes and adding TiO2 with the stir casting method, making samples, and testing samples consisting of tensile tests, hardness tests. The variations of the addition of TiO2 nanoparticles are 2%, 3%, and 4%. The highest tensile strength was 158.6 MPa at the addition of 4%, while Aluminum silicon with the addition of 2% and 3% was 131.3 MPa and 146.4 MPa, respectively. The highest hardness value is found in the addition of 4% with a value of 79.3 HV. While the addition of 2% and 3%, respectively, the hardness values obtained were 60.2 and 69.1 HV.
