TY - JOUR
T1 - Mechanical properties and biocompatibilities of Zr-Nb system alloys with different nb contents for biomedical applications
AU - Akahori, Toshikazu
AU - Niinomi, Mitsuo
AU - Nakai, Masaaki
AU - Tsutsumi, Harumi
AU - Kondo, Yusuke
AU - Hattori, Tomokazu
AU - Fukui, Hisao
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/8
Y1 - 2011/8
N2 - The microstructures, mechanical properties, and biocompatibilities of as-solutionized Zr-Nb system alloys with different Nb contents for biomedical applications were investigated. The microstructures of Zr-5 mass%Nb, Zr-10 mass%Nb, and Zr-20 mass%Nb alloys subjected to solution treatment (ST) consist of a, α, ω and β phases while the microstructure of Zr-30 mass%Nb alloy subjected to ST consists of almost all single ß phase. Young's modulus of Zr-20 mass%Nb alloy shows the lowest value of 63 GPa among the others alloys although the tensile strength and 0.2% proof stress decrease because of decrease in volume fraction of m phase while Zr-10 mass%Nb alloy with a large amount of ω phase shows the highest values of Young's modulus, tensile strength, and 0.2% proof stress. The elongations of Zr-20 mass%Nb and Zr-30 mass%Nb alloys show relatively high values of 22% and 24%, respectively. The cell viability and bone-bonding characteristics of Zr-Nb system alloys are improved with increasing Nb content. Therefore, it is considered that Zr-Nb alloys have relatively high biocompatibility and belong to bio-inert metallic biomaterial.
AB - The microstructures, mechanical properties, and biocompatibilities of as-solutionized Zr-Nb system alloys with different Nb contents for biomedical applications were investigated. The microstructures of Zr-5 mass%Nb, Zr-10 mass%Nb, and Zr-20 mass%Nb alloys subjected to solution treatment (ST) consist of a, α, ω and β phases while the microstructure of Zr-30 mass%Nb alloy subjected to ST consists of almost all single ß phase. Young's modulus of Zr-20 mass%Nb alloy shows the lowest value of 63 GPa among the others alloys although the tensile strength and 0.2% proof stress decrease because of decrease in volume fraction of m phase while Zr-10 mass%Nb alloy with a large amount of ω phase shows the highest values of Young's modulus, tensile strength, and 0.2% proof stress. The elongations of Zr-20 mass%Nb and Zr-30 mass%Nb alloys show relatively high values of 22% and 24%, respectively. The cell viability and bone-bonding characteristics of Zr-Nb system alloys are improved with increasing Nb content. Therefore, it is considered that Zr-Nb alloys have relatively high biocompatibility and belong to bio-inert metallic biomaterial.
KW - Beta-type zirconium alloy
KW - Bonecompatibility
KW - Cell viability
KW - Metallic biomaterial
KW - Microstructure
KW - Tensile properties
KW - Young's modulus
UR - http://www.scopus.com/inward/record.url?scp=80053508225&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053508225&partnerID=8YFLogxK
U2 - 10.2320/jinstmet.75.445
DO - 10.2320/jinstmet.75.445
M3 - Article
AN - SCOPUS:80053508225
VL - 75
SP - 445
EP - 451
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
SN - 0021-4876
IS - 8
ER -