EFFECT OF COPPER COMPOSITION VARIATION AND DIFFERENCE TIME OF SINTERING TO Ti-Cu ALLOY MICROSTRUCTURE AND MECHANICAL PROPERTIES FOR IMPLANT APPLICATION

• Main Author: WIJAYA (NIM : 12513063), KEVIN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28448
• Institution: Institut Teknologi Bandung

Every year, an estimated two million people around the world perform bone transplantation <br /> <br /> processes to deal with bone damage caused by bone disease or accidents. Obviously it takes <br /> <br /> implantable material to overcome it. Titanium is one of the most widely used metals in the <br /> <br /> medical world, due to its good biocompability to body, good corrosion resistance, and low <br /> <br /> elastic modulus. However, titanium alone does not have good antimicrobial properties. So <br /> <br /> another metal is needed to complete the deficiency of titanium, which is copper. <br /> <br /> This study was conducted by using sintered Ti-Cu alloy with variation of copper composition <br /> <br /> 10, 15 and 20%. The copper titanium powder was mixed inside the planetarry ball mill for 1 <br /> <br /> hour. In mixing process there is also a mechanical alloying process. The mixed Ti-Cu alloy <br /> <br /> then processed by compacting in the dies with 4 ton press force. After that, sintering process <br /> <br /> was done with variation of time for 2,4 and 8 hours at temperature 950o C. Sintered samples <br /> <br /> were then examined for microstructure using optical microscope and Scanning Electron <br /> <br /> Microscope (SEM), testing of Energy Dispersive Spectometer (EDS) to determine the phase <br /> <br /> compiler element, and hardness testing with Micro Vicker Hardness Tester. In addition, in this <br /> <br /> experiment also conducted a compressive strength test, to determine the strength of the alloy <br /> <br /> in holding the load. <br /> <br /> The experimental results show the microstructure formed on the Ti-Cu sintered alloy based on <br /> <br /> the analysis of XRD and SEM-EDS is &#945;-Ti phase and Ti2Cu intermetallic phase. In the Cu 10% <br /> <br /> composition, there is a lamellar structure which is a change in proeutectoid transformation. The <br /> <br /> average grain size of the alloy is 39.9&#956;m. There are several different pore area data, it's based <br /> <br /> on sintering time of 2, 4 and 8 hours. The values are 16.11%, 12.84% and 8.43%, respectively. <br /> <br /> The highest hardness of alloy is found in Ti-20wt% Cu alloy with sintering time for 8 hours, ie <br /> <br /> 345,82 HV. The highest alloy compressive strength value is in Ti-10wt% Cu alloy with 4 hours <br /> <br /> sintering time, ie 1253,22 MPa. <br />