STUDY OF HEATING RATE EFFECT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF TITANIUM COPPER ALLOYS USING SPARK PLASMA SINTERING METHOD

• Main Author: Nuansa Akbar, Ferdinan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61510
• Institution: Institut Teknologi Bandung

The number of Indonesia bone problems cases in 2010 reached 43,003 cases caused by traffic accidents and injuries during activities. This number will continue to grow because Indonesia's population is estimated to reach 273.65 million people with an estimated life expectancy of 73.7 years in 2025. One of the solution that can be use to overcome bone problems is bone implants. Titanium alloy has high strength, elastic modulus that close to human bone, good biocompatibility, and good corrosion resistance. The spark plasma sintering method is a technology that can be used to produce high density bulk from the constituent powders. In this study, spark plasma sintering was carried out on a titanium copper alloy. The titanium alloy products of SPS then characterized to determine the effects in microstructure and mechanical properties. The variables in this experiment were the addition of 1, 3, and 5 wt% copper composition and heating rates of 25, 50, and 100°C/minute. The XRD analysis, relative density, grain size, SEM-EDS, hardness properties, and compressive strength were compared for each variation. The results showed that SPS can increase the value of crystal plane spacing, increase the lattice parameters, decrease the crystallite size, and cause of different crystal orientations. The higher the copper composition, the lower the relative density in each variation of the heating rate. The highest relative density was obtained at 50°C/min for each copper composition variation. The higher the heating rate, the smaller the grain size. The optimum hardness value was achieved at 50°C/min. The highest increase in hardness and compressive strength values was obtained in Ti-1%Cu alloy. The factor that most influences the hardness value is relative density.