Bulk glass formation in the Ni–Zr–Ti–Nb–Si–Sn alloy system
Bulk glass formation in the Ni–Zr–Ti–Nb–Si–Sn alloy system
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DOI：
10.1557/jmr.2004.0286
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发表时间：
2004-08
影响因子：
2.7
通讯作者：
J. Y. Lee;D. Bae;J. Lee;D. Kim
中科院分区：
文献类型：
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作者：
J. Y. Lee;D. Bae;J. Lee;D. Kim
本文研究了Nb对Ni-Ti-Zr-Si-Sn合金非晶形成的影响。与不含Nb的合金相比，Dmax> 2 mm（Dmax，注铸法形成玻璃的最大直径）的块体玻璃的成分范围变宽。Δ T _x（= T _x-T_g; T _x，结晶起始温度; T_g，玻璃化转变温度），T _rg（= T _g/ T _l; T _1，液相线温度）和γ [= T _x/D _（max）> 2 mm的合金的[（T _1 + T _g）]值分别为40-59、0.638-0.651和0.410-0.419。合金的成分（D _max > 2 mm）比不含Nb的合金更接近伪共晶成分，显示出更好的非晶形成能力。玻璃形成的临界冷却速率（D _max = 5 mm）约为40 K/s。
In this study, the effect of addition of Nb on glass formation in Ni–Ti–Zr–Si–Sn alloys has been studied. The composition range for bulk glass formation with D _max > 2 mm ( D _max, maximum diameter for glass formation by injection cast method) becomes wider when compared with the non-Nb–containing alloy. The Δ T _x (= T _x – T _g; T _x, crystallization onset temperature; T_g, glass transition temperature), T _rg (= T _g/ T _l; T _l, liquidus temperature) and γ [= T _x/( T _l + T _g)] values for the alloys D _max > 2 mm are in the range of 40–59, 0.638–0.651, and 0.410–0.419, respectively. The compositions of the alloys ( D _max > 2 mm) are closer to pseudo-eutectic composition than that of the alloy without Nb, showing an improved glass forming ability. The critical cooling rate for glass formation ( D _max = 5 mm) is estimated to be order of approximately 40 K/s.