Abstract

Ti-based bulk metallic glasses (BMGs) are very attractive for applications because of their excellent properties such as high specific strength and high corrosion resistance. In this paper, we briefly review the current status of the research and development of Ti-based bulk metallic glasses. Emphasis is laid on glass-forming ability, mechanical properties, corrosion resistance, and biocompatibility.

Highlights

  • Metallic glasses are alloys which possess disordered atomic-scale structure and contain short- to medium-range ordered clusters

  • We summarize the details of the developments on the glass-forming ability, mechanical properties, corrosion resistance, and biocompatibility of Ti-based bulk metallic glass (BMG)

  • In order to improve the glass-forming ability (GFA) of these binary alloys and obtain Ti-based BMGs, different alloying elements have been added to the binary alloys to explore multicomponent Ti-based bulk metallic glass-forming alloy systems

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Summary

Introduction

Metallic glasses are alloys which possess disordered atomic-scale structure and contain short- to medium-range ordered clusters. In the 1970s and 1980s, metallic glasses could be directly made in bulk form by solidifying the melt at relatively low cooling rates (typically 103 K/s or less), where “bulk” is defined as that the minimum dimension of the alloy sample exceeds 1 mm. In 1974, the first reported bulk metallic glass (BMG) was developed in the Pd–Cu–Si alloy system by Chen et al and only φ1–2 mm glassy samples could be prepared [2]. Titanium possesses ultrahigh specific strength together with high corrosion resistance and good biocompatibility. Compared with conventional crystalline titanium alloys, Ti-based BMGs show higher specific strength and other unique properties because of the amorphous structure and are more attractive for practical applications as structural and functional materials [29,30].

Glass-Forming Ability of Ti-Based BMGs
91 Cuwith
Alloy Development Studies
Be- and Pd-Free Ti-Based BMGs
Pd-Containing
40 Zr10 Cu32critical
Be-Containing
Role of Alloying
The Additions of Metalloid Elements
The Additions of Metallic Elements
The Additions of Rare-Earth Elements
Elastic Properties
Strength and Ductility
Fracture Toughness
Poisson’s Ratio Control Strategy
Nanocrystallization
Pre-Plastic Deformation
Surface Treatment
Fatigue Properties
Thermoplastic Formability
The Corrosion Resistance of Ti-Based BMGs
Biocompatibility
15. Implantation
Objective magnification of upper images is
Applications
Findings
Conclusions
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