Glass-Forming Ability and Thermal Stability of Ti–Zr–Cu–Pd–Si Bulk Glassy Alloys for Biomedical Applications

Abstract

The thermal properties, glass forming ability (GFA) and mechanical properties of a series of Ti 40 Zr 10 Cu 40Àx Pd 10 Si x (x ¼ 0, 1, 2) bulk glassy alloys were examined by differential scanning calorimetry (DSC), differential thermal analysis (DTA), X-ray diffractometry (XRD) and compression test. The bulk glassy alloys are expected to be used as biomedical materials because of the absence of toxic elements such as Ni, Al and Be. The glass-forming ability and thermal stability of the Ti-Zr-Cu-Pd alloy can be improved by a small amount of Si addition. The critical diameters for glass formation are 5 mm for

Review on the Research and Development of Ti-Based Bulk Metallic Glasses

“…A minor Si addition also shows a great effect on the thermal stability and GFA of Ti-based BMGs. For example, a 2 atom % Si addition to Ti-Zr-Cu-Pd BMG can extend the ∆T x from 50 K to 65 K, indicating an improvement in the thermal stability [49]. Substituting 1 atom % Ti with Si in a Ti 42.5 Zr 2.5 Hf 5 Cu 42.5 Ni 7.5 alloy increases the critical diameter from 2 mm to 5 mm [99].…”

“…With the addition of 2-4 atom % Sn, the critical diameter was markedly increased to 10 mm, which is larger than that of other Be-free Ti-based BMGs. Figure 5 shows the appearance of the as-cast 10 mm-diameter Ti 40 [49], Nb [50] and Co [117] have also been adopted as alloying elements for Ti-Zr-Cu-Pd quaternary alloys. The maximum critical diameters of Ti-Zr-Cu-Pd-Si, Ti-Zr-Cu-Pd-Nb, and Ti-Zr-Cu-Pd-Co were reported to be 5 mm, >2 mm, and 10 mm, respectively.…”

“…In 1998, the first Ti-based BMG was successfully prepared by a copper mold casting in a Ti-Cu-Ni-Sn alloy system [39]. Encouraged by this success, with the effort of scholars all over the world, a number of Ti-based BMGs, such as Ti-Cu-Ni [40,41], Ti-Zr-Be [42,43], Ti-Zr-Cu-Ni-Sn [44,45], Ti-Zr-Cu-Pd-(Sn, Si, Nb) [46][47][48][49][50], Ti-Zr-Cu-Ni-Be [51][52][53], Ti-Zr-Hf-Cu-Ni-Si-Sn [54], and Ti-Cu-Zr-Fe-Sn-Si-(Ag, Sc) [55][56][57], have been developed over the last few decades. Figure 1 shows the maximum diameters for glass formation obtained in different alloy systems and the year in which they were discovered [8,[58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73].…”

“…Figure 5 shows the appearance of the as-cast 10 mm-diameter Ti40Zr10Cu34Pd14Sn2 and Ti40Zr10Cu32Pd14Sn4 rods. Except Sn, Si [49], Nb [50] and Co [117] have also been adopted as alloying elements for Ti-Zr-Cu-Pd quaternary alloys. The maximum critical diameters of Ti-Zr-Cu-Pd-Si, Ti-Zr-Cu-Pd-Nb, and Ti-Zr-Cu-Pd-Co were reported to be 5 mm, >2 mm, and 10 mm, respectively.…”

“…In this section, we will focus on the effect of alloying on the GFA of Ti-based BMGs. Table 3 summarizes the effects of different alloying elements on the thermal stability (reflected by ∆Tx) and GFA of Ti-based BMGs [39,49,52,54,57,79,87,[90][91][92]99,[105][106][107][108]110,117,[125][126][127][128][129][130]. …”