The Comparison of Biocompatibility and Mechanical Properties among Ti-xNb Alloy, Ti-6Al-4V, and 316L Stainless Steel

• Main Authors: Ping-Hsuang Hsu, 許秉翔
• Other Authors: 吳威德
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/74657302645193070944

碩士 === 國立中興大學 === 材料科學與工程學系所 === 101 === Requirements of artificial teeth roots and implants include low elastic modulus, proper strength and good biocompatibility. The aim of this study is to develop a new type of titanium alloy with those requirements being mentioned. A Ti-Nb alloy is selected and casted from titanium and niobium powders and the alloys with different amount of niobium are obtained. Commercial stainless steel (AISI 316L) and titanium alloy (AMS 4911, Ti-6Al-4V) are selected in comparison with casted Ti-Nb alloys. Analysis focused on microstructure morphology, mechanical behavior and biocompatibilities test. Results show that Ti-10Nb consists of base α-Ti phase and reticular β-Ti phase, and Ti-40Nb consists of base α-Ti phase and needle-shaped β-Ti phase. Hardness sequence is: Ti-10Nb > Ti-6Al-4V > Ti-40Nb > 316L, and the elastic modulus sequence is: 316L> Ti-10Nb> Ti-6Al-4V >Ti-40Nb. MG-63 cell is selected for biocompatibilities test in order to examine cytotoxicity, cell attachment behavior and cell growth rate affected from four materials. Neither one of tested materials shows cytotoxicity. Attachment performance is: Ti-40Nb > 316L > Ti-6Al-4V > Ti-10Nb, and growth rate comparison is: Ti-10Nb ≧ Ti-40Nb > 316L > Ti-6Al-4V. From results and comparison of mechanical behavior and biocompatibilities test, Ti-10Nb shows medium hardness and lowest modulus, with excellent biocompatibilities than commercial 316L and Ti-6Al-4V alloy. Therefore, it can be a promising biomaterial.