Novel TiNbTaZrMo high-entropy alloys for metallic biomaterials. (1st March 2017)

• Record Type: Journal Article
• Authors: Todai, Mitsuharu; Nagase, Takeshi; Hori, Takao; Matsugaki, Aira; Sekita, Aiko; Nakano, Takayoshi
• Is Part Of: Scripta materialia. Volume 129(2017)
• Page Start: 65
• Page End: 68
• Publication Date: 2017-03-01
• Subjects: Biomaterials -- High-entropy alloys (HEAs) -- Microstructure -- Solidification -- Crystal structure; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.10.028
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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 such as the mixing enthalpy (Δ H mix ), the omega parameter ( Ω ), the delta parameter ( δ ), and the valence electron concentration (VEC) theory. 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. This study demonstrated the possibility of using HEAs as a new class of metallic biomaterials. Graphical abstract: Highlights: A new TiNbTaZrMo high-entropy alloy (HEA) was developed for metallic biomaterials. The use of HEAs as a new class of metallic biomaterials was demonstrated. Two bcc solid-solution phases were obtained in the TiNbTaZrMo HEA. The TiNbTaZrMo HEA exhibits considerable strength with deformability. The TiNbTaZrMo HEA shows superior biocompatibility comparable to pure Ti.