Mechanical properties and biocompatibility of a novel miniscrew made of ZrNiCuAl bulk metallic glass for orthodontic anchorage.

The purpose of the present study was to fabricate a miniscrew possible for clinical application using ZrNiCuAl bulk metallic glass (BMG), which has high mechanical strength, low elastic modulus, and high biocompatibility. First, the elastic moduli of Zr-based metallic glass rods made of ZrNiCuAl, ZrNiCuAl, ZrNiCuAl, ZrNiCuAl, and ZrNiCuAl were measured. ZrNiCuAl had the lowest elastic modulus among them.

Nonaffine Strains Control Ductility of Metallic Glasses.

The origin of limited plasticity in metallic glasses is elusive, with no apparent link to their atomic structure. We propose that the response of the glassy structure to applied stress, not the original structure itself, provides a gauge to predict the degree of plasticity. We carried out high-energy x-ray diffraction on various bulk metallic glasses (BMGs) under uniaxial compression within the elastic limit and evaluated the anisotropic pair distribution function.

Probing heat generation during tensile plastic deformation of a bulk metallic glass at cryogenic temperature.

Despite significant research efforts, the deformation and failure mechanisms of metallic glasses remain not well understood. In the absence of periodic structure, these materials typically deform in highly localized, thin shear bands at ambient and low temperatures. This process usually leads to an abrupt fracture, hindering their wider use in structural applications.

Biosafety, stability, and osteogenic activity of novel implants made of ZrNiCuAl bulk metallic glass for biomedical application.

Unlabelled: Superior mechanical and chemical properties of ZrNiCuAl bulk metallic glass (BMG) demonstrate its promise as a novel biomaterial for fabrication of implants. The aim of the present study was to validate mechanical, chemical, and biological properties of ZrNiCuAl BMG through comparison with titanium (Ti). Our data indicated higher tensile strength, lower Young's modulus, and reduced metal ion release of ZrNiCuAl BMG compared with Ti.

Ni-free Zr-Cu-Al-Nb-Pd bulk metallic glasses with different Zr/Cu ratios for biomedical applications.

Zr-based bulk metallic glasses (BMGs) possess attractive properties for prospective biomedical applications. The present study designs Ni-free Zr-Cu-Al-Nb-Pd BMGs and investigates their in vitro biocompatibility by studying mechanical properties, bio-corrosion resistance, and cellular responses. The Ti-6Al-4V alloy is used as a reference material.

Formation of metallic glass nanowires by gas atomization.

Gas atomization which is a conventional technique in powder metallurgy is adapted for the formation of metallic glass nanowires. This approach is able to produce a large quantity of nanowires with diameters in the 50-2000 nm range. Experiments performed with different conditions and alloy compositions confirm that the key mechanism of the nanowire formation is the spinnability which increases exponentially when the melt stream is supercooled from the liquid state.