Enhanced Mechanical Properties of MgZnCa Bulk Metallic Glass Composites with Ti-Particle Dispersion

Wong, Pei‐Chun; Lee, Tsung Hsiung; Tsai, P.H.; Cheng, Cheng‐Kung; Li, Chuan; Jang, J.S.C.; Huang, J.C.

doi:10.3390/met6050116

Cited by 11 publications

(9 citation statements)

References 18 publications

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“…The samples were cut into rods with 10 mm length and 2 mm diameter, and polished at both ends to ensure surface flatness. Our previous studies have reported the microstructure, thermal properties, mechanical properties, and degradation behavior of Mg 60 Zn 35 Ca 5 BMGCs with 40 vol% Ti particles (with particle size of 75–105 μm) [4,5]. Mg 60 Zn 35 Ca 5 BMGCs with 40 vol% Ti particles possess the amorphous matrix and exhibit a compressive strength of around 800 MPa, and the calculated degradation rate around 0.26 mm/year.…”

Section: Methodsmentioning

confidence: 99%

“…The in vitro degradation behavior of Mg 60 Zn 35 Ca 5 BMGC was evaluated well in our previous work [4]. The dispersion of titanium particles within the composite markedly improve the compressive strength and brittleness of Mg 60 Zn 35 Ca 5 BMGC relative to those of conventional biodegradable implants made of synthetic polymers, rendering it a suitable candidate for developing load-bearing bone fixation devices [5].…”

Section: Introductionmentioning

confidence: 96%

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Biocompatibility and Osteogenic Capacity of Mg-Zn-Ca Bulk Metallic Glass for Rabbit Tendon-Bone Interference Fixation

Wong

Tsai

et al. 2019

IJMS

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Mg-based alloys have great potential for development into fixation implants because of their highly biocompatible and biodegradable metallic properties. In this study, we sought to determine the biocompatibility of Mg60Zn35Ca5 bulk metallic glass composite (BMGC) with fabricated implants in a rabbit tendon–bone interference fixation model. We investigated the cellular cytotoxicity of Mg60Zn35Ca5 BMGC toward rabbit osteoblasts and compared it with conventional titanium alloy (Ti6Al4V) and polylactic acid (PLA). The results show that Mg60Zn35Ca5 BMGC may be classed as slightly toxic on the basis of the standard ISO 10993-5. We further characterized the osteogenic effect of the Mg60Zn35Ca5 BMGC extraction medium on rabbit osteoblasts by quantifying extracellular calcium and mineral deposition, as well as cellular alkaline phosphatase activity. The results of these tests were found to be promising. The chemotactic effect of the Mg60Zn35Ca5 BMGC extraction medium on rabbit osteoblasts was demonstrated through a transwell migration assay. For the in vivo section of this study, a rabbit tendon–bone interference fixation model was established to determine the biocompatibility and osteogenic potential of Mg60Zn35Ca5 BMGC in a created bony tunnel for a period of up to 24 weeks. The results show that Mg60Zn35Ca5 BMGC induced considerable new bone formation at the implant site in comparison with conventional titanium alloy after 24 weeks of implantation. In conclusion, this study revealed that Mg60Zn35Ca5 BMGC demonstrated adequate biocompatibility and exhibited significant osteogenic potential both in vitro and in vivo. These advantages may be clinically beneficial to the development of Mg60Zn35Ca5 BMGC implants for future applications.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Biocompatibility and Osteogenic Capacity of Mg-Zn-Ca Bulk Metallic Glass for Rabbit Tendon-Bone Interference Fixation

Wong

Tsai

et al. 2019

IJMS

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“…Most of the existing works have been carried out by selecting the composition that can form metallic glass with a large D c [26][27][28][29][30][31][32][33][34], while research on metallic glass with a small D c is still rarely reported. If a fourth component is added into the aforementioned compositions, the changes in the structure of amorphous matrix and mechanical properties of the alloys are worth noting.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ag, Nd, and Yb on the Microstructures and Mechanical Properties of Mg‒Zn‒Ca Metallic Glasses

Liang

Yang

et al. 2018

Metals

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Mg‒Zn‒Ca metallic glasses are regarded as promising biodegradable materials. Previous studies on this alloy system have mostly focused on the composition regions with a large critical size (Dc) for the formation of metallic glasses, while this paper investigates the composition regions with a small Dc, which has been overlooked by researchers for a long time. The effects of the addition of Ag, Nd, and Yb elements on the microstructure and mechanical properties of Mg‒Zn‒Ca metallic glasses were studied. It was found that the Mg‒Zn‒Ca metallic glass exhibits a single and uniform amorphous structure with a compressive strength of 590 MPa. After the addition of a small amount of Ag into the alloy, the amorphous matrix is retained and new precipitate phases that lead to the decrease of the compressive strength are formed. The addition of the rare earth elements Nd and Yb changes the microstructure from a single amorphous matrix to a large number of quasicrystal phases, which results in an increase in compressive strength. The compressive strength of the Mg‒Zn‒Ca‒Yb alloy increases to 606.2 MPa due to the formation of multi-layered swirling solidified structure and a large number of small quasicrystals with high microhardness. Moreover, this study can be considered as a useful supplement to the existing studies on the Mg‒Zn‒Ca alloy system; it also provides new ideas for designing the microstructure and spatial structure of quasicrystal containing alloys with high performances.

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“…However, the strain softening induced by the formation of shear bands in the glassy matrix cannot be compensated by the strain hardening provided by these ductile phases during deformation. Overall, the microscopic strain-softening of BMG composites dominates their plastic deformation [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In this regard, shape memory B2 CuZr crystals were introduced into a glassy matrix as an alternative reinforcing phase because the B2 CuZr crystals usually show a pronounced work hardening during deformation due atmosphere, which were remelted at least for three times to achieve chemical homogeneity.…”

Section: Introductionmentioning

confidence: 99%

“…In the past decades, a new class of composites, called bulk metallic glass (BMG) composites, have been explored by introducing ductile crystalline phases ex situ or in situ in a glassy matrix in order to enhance the ductility or/and toughness at the cost of the high strength of intrinsically brittle BMGs [4][5][6][7][8][9][10][11][12][13][14][15]. During deformation, ductile crystals in BMG composites may serve as heterogeneous nucleation sites for the initiation of shear bands and act as attraction or pinning centers during shear band propagation.…”

Section: Introductionmentioning

confidence: 99%

Glass-Forming Ability and Early Crystallization Kinetics of Novel Cu-Zr-Al-Co Bulk Metallic Glasses

Han

Qin

et al. 2016

Metals

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Abstract:In recent years, CuZr-based bulk metallic glass (BMG) composites ductilized by a shape memory B2 CuZr phase have attracted great attention owing to their outstanding mechanical properties. However, the B2 CuZr phase for most CuZr-based glass-forming compositions is only stable at very high temperatures, leading to the uncontrollable formation of B2 crystals during quenching. In this work, by introducing Co (i.e., 4, 5, and 6 at. %) and 10 at. % Al into CuZr-based alloys, the relatively good glass-forming ability (GFA) of CuZr-based alloys still can be achieved. Meanwhile, the B2 phase can be successfully stabilized to lower temperatures than the final temperatures of crystallization upon heating CuZr-based BMGs. Unlike previous reported CuZr-based BMGs, the primary crystallization products upon heating are mainly B2 CuZr crystals but not CuZr 2 and Cu 10 Zr 7 crystals. Furthermore, the primary precipitates during solidification are still dominated by B2 crystals, whose percolation threshold is detected to lie between 10 ± 2 vol. % and 31 ± 2 vol. %. The crystallization kinetics underlying the precipitation of B2 crystals was also investigated. Our results show that the present glass-forming composites are promising candidates for the fabrication of ductile CuZr-based BMG composites.

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Enhanced Mechanical Properties of MgZnCa Bulk Metallic Glass Composites with Ti-Particle Dispersion

Cited by 11 publications

References 18 publications

Biocompatibility and Osteogenic Capacity of Mg-Zn-Ca Bulk Metallic Glass for Rabbit Tendon-Bone Interference Fixation

Biocompatibility and Osteogenic Capacity of Mg-Zn-Ca Bulk Metallic Glass for Rabbit Tendon-Bone Interference Fixation

Effects of Ag, Nd, and Yb on the Microstructures and Mechanical Properties of Mg‒Zn‒Ca Metallic Glasses

Glass-Forming Ability and Early Crystallization Kinetics of Novel Cu-Zr-Al-Co Bulk Metallic Glasses

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