STUDY OF MICROSTRUCTURE FROM TITANIUM-COPPER SINTERED ALLOY (3 AND 10 wt% Cu)

• Main Author: MUTTAKIN (NIM : 12514033), ZAINAL
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31882
• Institution: Institut Teknologi Bandung

Biomaterials are materials that interact directly with organs of living things, for example bone implants. Titanium has been widely used as a raw material for implants because it meets the requirements of implant materials. Titanium-copper alloy (Ti-Cu) made through powder metallurgy is proven to produce strong antibacterial properties without reducing the mechanical properties and corrosion resistance of alloys. In addition, the addition of Cu as an alloying element in the Ti matrix using powder metallurgy also improves the mechanical properties of the alloy. Therefore, it is necessary to study the microstructure and hardness of Ti-Cu alloys with hypoeutectoid and hypereutectoid compositions which are quenched at different temperatures. <br /> <br /> Ti-Cu alloy in this study was made by powder metallurgy method. Copper powder and titanium powder were mixed mechanically alloying with a variation in the composition of the weight of copper 3% (hypoeutectoid) and 10% (hypereutectoid). The results of the mixture are shaped and then compressed at a pressure of 60 kN. Then the specimen was sintered in the tube furnace at 950°C for 2 hours and immediately carried out water-quenching. Each variation of the composition was reheated at 850°C and 750°C for 10 minutes, then immediately water-quenched. Microstructure of specimens produced by water-quenching was observed using optical microscopy and SEM. The compounds and phases formed in the specimens were observed using EDS. The hardness of the specimen was tested using the Vickers Hardness Test tool. <br /> <br /> The microstructure formed in the Ti-3Cu sintered (hypoeutectoid) alloy due to water-quenching in the &#946; area is &#945;’ martensite and retained &#946;; in the &#945; + &#946; area is &#945;, retained &#946;, and &#945;’ martensite; in the area of &#945; + Ti2Cu is &#945; and Ti2Cu). The microstructure formed in the Ti-10Cu sintered (hyperutectoid) alloy due to water-quenching in the &#946; area is &#945;’ martensite and retained &#946;; in the &#945; + &#946; area is &#945;’ martensite, retained &#946;, and Ti2Cu; in the area of &#945; + Ti2Cu are &#945;’ martensite and Ti2Cu. The highest hardness value was obtained in Ti-10Cu alloy with 950°C water-quenching temperature, namely 417.9 HV.