[PDF] Top 20 Preparation of Cu-based bulk metallic glasses by suction casting

... As mentioned above, the cooling rate obtained was deter- mined using an Al-4.5 wt%Cu alloy. Cooling rate is a function of both the alloy composition and the casting parameters used; therefore, the values ... See full document

... of casting process as complete melting occurred and it forced the foreign/unmelted particles to gather only in regions which later can be easily removed by ...during suction and sucks the air into permanent ... See full document

... 5:1) ingots were prepared by arc melting the mixture of high purity Ti (99.9%), Cu (99.9%), Zr (99.9%), Co (99.5%), Sn (99.9%) and a commercially available Cu-11.6% Be alloy under a Ti-gettered purified ... See full document

... Ni-based metallic glass, fillability and castability were investigated using a Vickers indented ...die- casting (Al-Cu-Si system; ADC12 in JIS) was also inves- tigated for ...Ni-based ... See full document

... loys were prepared by arc-melting the pure elements with purities ranging from 99.5% to 99.99% together under a purified argon atmosphere. Cylindrical rods with 3 mm diameter were produced by chill-casting into a ... See full document

... several times in order to obtain homogeneity of the alloy. Rods of 2{4 mm have been produced by in-situ solid- ification in a suction casting facility attached to the arc melter. A optical microscope (OM), ... See full document

... critical casting thickness is required, and ingots of at least 30 g would be required (very difficult with laboratory-scale ...through suction casting in a mini arc ... See full document

... multicomponent metallic glasses (amor- phous alloys) with high glass-forming ability have been found and bulk metallic glasses in rod and sheet have been produced in these new alloy ... See full document

... Ca-Mg-Al-based bulk metallic glasses containing additionally Cu and Zn, were produced by a copper mold casting method as wedge-shaped samples with thicknesses varying from ... See full document

... critical casting diameter in the Zr-Cu-Al-Ni ...before casting. In each pre-casting melting step, the arc was circled over the material for approximately 10 ... See full document

... technique. The biocorrosion behaviors of the BMGs in phosphate buffer solution (PBS, pH=7.4) at 37 º C were investigated and compared to crystalline biomaterials including Ti-6Al-4V and 316L stainless steel as controls. ... See full document

... To understand the potential energy formalism for glasses it is instructive to first consider the case of an equilibrium liquid. Sticking to classical physics, if the liquid is composed of N atoms, then the ... See full document

... FEM based on the macroscale continuum mechanics is essential in order to obtain the local deformation behaviour, especially in analysing the potential of BMG materials for the superplasticity of ... See full document

... with other alloys, Zr-based BMG shows superior yield strength, elastic strain, Vickers hardness; it also owns relatively low plastic strain, and toughness. The Young’s modulus of Zr-based BMG is much closer ... See full document

... There is not currently a mathematical framework presented in the literature for modelling transformation toughening in metallic glass composites. However, there exists a body of literature surrounding the ... See full document

... stabilization of supercooled liquid, which suppress nuclea- tion and growth reactions of a crystalline phase from liquid. Addition of Ag to Cu-Zr-Al does not satisfy the three component rules, since the ... See full document

... However, careful observation reveals evidence of shear banding even on the less jagged surfaces of Figure 3-2(b)-(e). Figure 3-6 is a magnified image of the squared area marked in Figure 3-2(c). The fracture surface ... See full document

... diameter and 50 mm length were prepared by copper mold casting of the prealloys. Discs of 1 mm in height were cut from the rods. To analyze the short- and medium-range order, high energy X-ray diffraction ... See full document

... and alloyed together, in order to evaluate the corrosion resistance in the Ca-Mg system. Finally, Al was chosen to evaluate the corrosion effect of this protective oxide-forming element. Each composition was prepared with ... See full document

... Bulk metallic glass (BMG) and its composites possessing unique mechanical, magnetic and corrosion-resistant proper- ties are highly potential for structural and functional ...two metallic glassy ... See full document