Mechanical properties and biocompatibilities of Zr-Nb system alloys with different nb contents for biomedical applications

Toshikazu Akahori, Mitsuo Niinomi, Masaaki Nakai, Harumi Tsutsumi, Yusuke Kondo, Tomokazu Hattori, Hisao Fukui

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)445-451
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number8
Publication statusPublished - 2011 Aug


  • Beta-type zirconium alloy
  • Bonecompatibility
  • Cell viability
  • Metallic biomaterial
  • Microstructure
  • Tensile properties
  • Young's modulus

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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