生体用ハイエントロピー合金(BioHEA) の履歴(No.15)

生体ハイエントロピー合金†

Figure 1 Mechanical properties and biocompatibility in TiNbTaZrMo HEAs [1]

A novel equiatomic TiNbTaZrMo high-entropy alloy (HEA) was developed as a new metallic biomaterial. The constituent elements of the HEA were biocomparable, and the HEA was designed based on parameters for predicting solid solution phase in complex, concentrated alloys (CCAs). The bcc solid solution phases with the different lattice constants were obtained in as-cast and annealed states. The HEA showed considerable strength with deformability and superior biocompatibility comparable to pure Ti [1].

REFERENCES
[1] M. Todai, T. Nagase, T. Hori, A. Matsugaki, A. Sekita, T. Nakano, Scripta Materialia, 129, 65-68 (2017)., "Novel TiNbTaZrMo high-entropy alloys for metallic biomaterials", http://dx.doi.org/10.1016/j.scriptamat.2016.10.028
[2] T. Nagase, M. Todai, T. Hori, T. Nakano, Journal of Alloys and Compounds, 753, 412-421 (2018)., "Microstructure of equiatomic and non-equiatomic Ti-Nb-Ta-Zr-Mo high-entropy alloys for metallic biomaterials", https://doi.org/10.1016/j.jallcom.2018.04.082
[3] T. Nagase, K. Mizuuchi, T. Nakano, Entropy, 21, 483 1-17 (2019), "Solidification microstructures of the ingots obtained by arc melting and cold crucible levitation melting in TiNbTaZr medium-entropy alloy and TiNbTaZrX (X = V, Mo, W) high-entropy alloys", https://doi.org/10.3390/e21050483
[4] T. Hori, T. Nagase, M. Todai, A. Matsugaki, T. Nakano, Scripta Materialia, 172, 83-87 (2019)., "Development of Non-equiatomic Ti-Nb-Ta-Zr-Mo High-Entropy Alloys for Metallic Biomaterials", https://doi.org/10.1016/j.scriptamat.2019.07.011
[5] T. Nagase, Y. Iijima, A. Matsugaki, K. Ameyama, T. Nakano, Mater. Sci. Eng. C, 107, 110322 (2020)., "Design and fabrication of Ti-Zr-Hf-Cr-Mo and Ti-Zr-Hf-Co-Cr-Mo high-entropy alloys as metallic biomaterials", https://doi.org/10.1016/j.msec.2019.110322

REFERENCES (Review paper)
[1] 中野貴由, 永瀬丈嗣, 當代光陽, 月刊BIO INDUSTRY, Vol. 34, No. 5, 8-20 (2017)., "生体用高強度ハイエントロピー合金の開発", https://www.cmcbooks.co.jp/products/detail.php?product_id=5266

PRESS REPORT
[1] 2019/08/05 人工骨など向け高強度の新合金, 日経新聞
[2] 2016/11/30 「阪大、チタンより固い生体合金開発強度１．７倍、人工関節用に」日刊工業新聞