Formation and properties of new Ni–Ta-based bulk glassy alloys with large supercooled liquid region
Formation and properties of new Ni–Ta-based bulk glassy alloys with large supercooled liquid region
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DOI：
10.1016/j.msea.2007.11.003
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发表时间：
2008-06
期刊：
影响因子：
6.4
通讯作者：
Wei Zhang;K. Arai;C. Qin;F. Jia;A. Inoue
中科院分区：
文献类型：
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作者：
Wei Zhang;K. Arai;C. Qin;F. Jia;A. Inoue
在Ni-Ta二元合金中添加Ti和Zr可有效地提高过冷液相的稳定性和非晶形成能力。Ni 60 Ta 15 Ti 20 Zr 5的最大过冷液态区（ΔTx）为73 K，约化玻璃转变温度（Trg）为0.60，从而形成了块体玻璃合金。随后向Ni-Ta-Ti-Zr合金中添加适量的Co和Cu降低了液相线温度（T1），导致GFA的改善。Ni 48 Ta 15 Ti 20 Zr 5Co 7 Cu 5合金在共晶成分附近获得了最佳的非晶形成，并制备了直径达1.5mm的非晶合金样品。新型Ni-Ta基块体非晶合金具有较大的Δ Tx（72- 84 K），较高的断裂强度（3050 MPa以上）和明显的塑性应变，在1 N HCl溶液中具有优异的耐蚀性。
The addition of Ti and Zr to Ni–Ta binary alloys is effective for the increase in stabilization of supercooled liquid and glass-forming ability (GFA). The maximum supercooled liquid region (ΔTx) of 73K and the reduced glass transition temperature (Trg) of 0.60 were obtained for Ni60Ta15Ti20Zr5, leading to the formation of the bulk glassy alloys. The subsequent addition of appropriate amounts of Co and Cu to Ni–Ta–Ti–Zr alloys lowers liquidus temperature (Tl), resulting in the improvement of GFA. The best GFA was obtained for Ni48Ta15Ti20Zr5Co7Cu5alloy which was located near the eutectic composition of the multi-component alloys, and the glassy alloy samples with diameters up to 1.5mm were fabricated. The new Ni–Ta-based bulk glassy alloys exhibit large ΔTxof 72–84K, high fracture strength of over 3050MPa with a distinct plastic strain, and excellent corrosion resistance in 1N HCl solution.