Surface hardening by gaseous oxidizing of (Zr55Cu30Al10Ni5)98Er2 bulk-metallic glass

Haratian, Saber; Grumsen, Flemming Bjerg; Villa, Matteo; Christiansen, Thomas

doi:10.1016/j.jallcom.2019.06.042

Cited by 5 publications

(7 citation statements)

References 33 publications

(33 reference statements)

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“…The development of an IOZ is consistent with those described in Refs. [24][25]. For the present case, however, the development of an outer oxidation zone as in Refs.…”

Section: Microstructure In the Internal Oxidation Zone 22mentioning

confidence: 76%

“…%) elemental constituents in a Ti-gettered argon atmosphere. The details of the preparation procedure can be found elsewhere [24][25].…”

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

“…% CO2, imposes an extremely low oxygen partial pressure of pO2≈ 10 -41 bar, at a total gas pressure of 1 bar. This extremely low pO2 was applied to avoid the formation of a porous non-homogenous outer oxidized network as was observed in previous studies at higher pO2 [24][25]. It is noted that the applied gas mixture applies a carbon activity of 2.8×10 5 (reference: graphite at 1 atm).…”

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

“…Recent investigations suggest that surface hardening by low-temperature gaseous oxidizing of ZrCuAl-based BMG in a controlled atmosphere is feasible [24]. Applying a high oxygen partial pressure (pO2), it was demonstrated that the dissolution of oxygen into the surface zone of the BMG results in the formation of internal and outer oxidation zones.…”

Section: Introductionmentioning

confidence: 99%

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Strain, stress and stress relaxation in oxidized ZrCuAl-based bulk metallic glass

et al. 2020

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“…The development of an IOZ is consistent with those described in Refs. [24][25]. For the present case, however, the development of an outer oxidation zone as in Refs.…”

Section: Microstructure In the Internal Oxidation Zone 22mentioning

confidence: 76%

“…%) elemental constituents in a Ti-gettered argon atmosphere. The details of the preparation procedure can be found elsewhere [24][25].…”

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

Section: Sample Preparation and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strain, stress and stress relaxation in oxidized ZrCuAl-based bulk metallic glass

et al. 2020

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“…Du and co-researchers [22] successfully reduced E. coli and S. aureus bacterial adhesion on Zr-based BMGs by femtosecond laser surface patterning, whilst having no effect on mammalian cell viability. Haratin et al [23] shown improved surface hardness of (Zr 55 Cu 30 Al 10 Ni 5 ) 98 Er 2 BMG from~600 to~1200HV using gaseous oxidising treatment, in which case a topmost Cu-rich zone formed on the surface oxide. Zhou and co-researchers [24] reported improved wear resistance of Ni-free (Zr 0.5 Ti 0.02 Cu 0.38 Al 0.1 ) 98 Y 2 BMG by thermal oxidation treatment below the glass transition temperature (T g ) of the BMG.…”

Section: Potential Solutions Limitations and Research Aimmentioning

confidence: 99%

Improving the Tribological Properties and Biocompatibility of Zr-Based Bulk Metallic Glass for Potential Biomedical Applications

et al. 2020

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Zr-based bulk metallic glasses (Zr-BMGs) are potentially the next generation of metallic biomaterials for orthopaedic fixation devices and joint implants owing to their attractive bulk material properties. However, their poor tribological properties and long-term biocompatibility present major concerns for orthopaedic applications. To this end, a novel surface modification technology, based on ceramic conversion treatment (CCT) in an oxidising medium between the glass transition temperature and the crystallisation temperature, has been developed to convert the surface of commercially available Zr44Ti11Cu10Ni11Be25 (Vitreloy 1b) BMG into ceramic layers. The engineered surfaces were fully characterised by in-situ X-ray diffraction, glow-discharge optical emission spectroscopy, scanning electron microscopy, transmission electron microscopy, and scanning transmission electron microscopy. The mechanical, chemical, and tribological properties were evaluated respectively by nano-indentation, electrochemical corrosion testing, tribological testing and the potential biocompatibility assessed by a cell proliferation assay. The results have demonstrated that after CCT at 350 °C for 40 h and at 380 °C for 4.5 h the original surfaces were converted into to a uniform 35–55-nm-thick oxide layer (with significantly reduced Ni and Cu concentration) followed by a 200–400-nm-thick oxygen-diffusion hardened case. The surface nano hardness was increased from 7.75 ± 0.36 to 18.32 ± 0.21 GPa, the coefficient of friction reduced from 0.5–0.6 to 0.1–0.2 and the wear resistance improved by more than 60 times. After 24 h of contact, SAOS-2 human osteoblast-like cells had increased surface coverage from 18% for the untreated surface to 46% and 54% for the 350 °C/40 h and 380 °C/4.5 h treated surfaces, respectively. The significantly improved tribological properties and biocompatibility have shown the potential of the ceramic conversion treated Zr-BMG for orthopaedic applications.

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Influence of Oxidation on Structure, Performance, and Application of Metallic Glasses

et al. 2022

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Owing to their unique structure and outstanding properties, metallic glasses are a novel class of structural and functional materials with vast application prospects. However, the metastable amorphous structures and chemical activity of metallic glass constituent elements lead to frequent oxidation during preparation, processing, and application. Comprehensively understanding the oxidation behaviors and underlying mechanisms of metallic glasses is essential for gaining knowledge of metallic glass structures and properties and for promoting engineering applications. Although many studies have examined these issues, more investigations are still required to explore potential industrial applications of metallic glasses. Here, recent research on metallic glass oxidation is consolidated by summarizing the oxidation influence on metallic glass structure, performance, and application and the possibilities and feasibility of oxidizing metallic glasses to reinforce materials or develop material systems are discussed.

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Surface hardening by gaseous oxidizing of (Zr55Cu30Al10Ni5)98Er2 bulk-metallic glass

Cited by 5 publications

References 33 publications

Strain, stress and stress relaxation in oxidized ZrCuAl-based bulk metallic glass

Strain, stress and stress relaxation in oxidized ZrCuAl-based bulk metallic glass

Improving the Tribological Properties and Biocompatibility of Zr-Based Bulk Metallic Glass for Potential Biomedical Applications

Influence of Oxidation on Structure, Performance, and Application of Metallic Glasses

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