Effect of Ti addition on the crystallization behavior and glass-forming ability of Zr–Al–Cu alloys

Real time synchrotron radiation studies on metallic glass (Zr0.55Al0.1Ni0.05Cu0.3)99Y1 after cold rolling

“…In addition to the differences in deformation methods and deformation degree, the composition-induced free volume cannot be neglected. The atomic radius of Ti falls in between the larger Zr and the smaller Cu atoms; thus the addition of 5 at% Ti is expected to lead to more complex structure with mismatched atoms such Zr, Cu, Ni and Al after deformation [18]. The change of free volume detected by DSC was also nearly twice, when only 2 at% Zr was substituted by Ti [19].…”

“…Calculated diffraction pattern of Zr 3 Al 2 and bcc Zr superimposed onto XRD spectra of Zr 69.5 Cu 12 Ni 11 Al 7.5 , l ¼ 0.50002(5) Å[18].…”

Enhancement of glass-forming ability and bio-corrosion resistance of Zr–Co–Al bulk metallic glasses by the addition of Ag

“…Variation parameters, T x , the reduced glass transition temperature T rg (=T g /T l ) and (=T x /T g + T l ) [13], are used to evaluate the GFA of the BMGs. From Table 1, one can notice that the Zr 53 Co 15.5 Al 23.5 Ag 5 BMG exhibits the largest T rg of 0.623 and of 0.415, consistent with the largest critical size of 10 mm, demonstrating that this alloy has the highest GFA.…”

“…Especially, Ni is usually blamed for the occurrence of an allergy and has antiproliferative effects on cell cultures [6]. To overcome the drawback, researchers have recently developed a few Ni-free Zr-based BMG systems including Zr-Cu-Fe-Al [1], Zr-(Cu, Ag)-Al [7,8], Zr-Co-Al-(Cu) [9,10], Zr-Cu-Pd-Al-Nb [11], Zr-Cu-Al [12] and Zr-Cu-Al-Ti [13]. Among them, the Zr-Co-Al BMGs are free of both Ni and Cu, thus are more promising to be biomaterials from the biocompatible point of view.…”

Influence of minor addition of Pd, Ag or Au on the microstructural evolution of mechanically alloyed Zr–Ni alloys

“…Experimental evidences indicate that alloying additions of small atoms (such as C and Si with an atomic radius <0.12 nm) [3][4][5] or large atoms (such as Ti and Y with an atomic radius >0.16 nm) [6][7][8] are most effective in enhancing the glass forming ability (GFA) or thermal stability in various glass forming alloys. However, transition metals with intermediate atomic sizes, such as Pd (0.13754 nm), Ag (0.14447 nm) or Au (0.14420 nm) [9], have been less selected as minor alloying elements in various systems.…”