Influence of oxygen on the crystallization behavior of Zr65Cu27.5Al7.5 and Zr66.7Cu33.3 metallic glasses
Influence of oxygen on the crystallization behavior of Zr65Cu27.5Al7.5 and Zr66.7Cu33.3 metallic glasses
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DOI：
10.1016/s1359-6454(00)00190-7
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发表时间：
2000-09
期刊：
影响因子：
9.4
通讯作者：
B. S. Murty;D. Ping;K. Hono;A. Inoue
中科院分区：
文献类型：
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作者：
B. S. Murty;D. Ping;K. Hono;A. Inoue
研究了氧对Zr65−xCu27.5Al7.5Ox(x=0.14、0.43和0.82)和Zr66.7−xCu33.3Ox(x=0.14和0.82)金属玻璃结晶行为的影响。 Zr-Cu-Al 合金的过冷液态状态 (ΔTx) 随着氧含量的增加而降低，而 Zr-Cu 金属玻璃的过冷液态状态则随着氧含量的增加而增加。对于 Zr-Cu 金属玻璃，结晶产物 (Zr2Cu) 不受氧含量的影响，而在 Zr-Cu-Al 合金中，氧含量对结晶顺序有很大影响。在低氧含量（x=0.14）下，三元玻璃多晶型结晶为Zr2(Cu,Al)。在较高的氧含量下，三元非晶合金分两个阶段结晶，首先结晶为二十面体相，随后结晶为稳定的Zr2(Cu,Al)相。三维原子探针结果表明，二十面体相和非晶相的组成分别接近于Zr75Cu15Al5O5和Zr62Cu24Al14。
The influence of oxygen on the crystallization behavior of Zr65−xCu27.5Al7.5Ox(x=0.14, 0.43 and 0.82) and Zr66.7−xCu33.3Ox(x=0.14 and 0.82) metallic glasses has been studied. The supercooled liquid regime (ΔTx) decreases with increase in oxygen content for the Zr–Cu–Al alloy, while it increases for the Zr–Cu metallic glass. In the case of the Zr–Cu metallic glass, the crystallization product (Zr2Cu) is not influenced by the oxygen content, while in Zr–Cu–Al alloys the oxygen level has a strong influence on the crystallization sequence. At low oxygen level (x=0.14), the ternary glass crystallizes polymorphously to Zr2(Cu,Al). At higher oxygen content, the ternary amorphous alloy crystallizes in two stages by primary crystallization into an icosahedral phase and subsequently to the stable Zr2(Cu,Al) phase. Three-dimensional atom probe results have shown that the composition of the icosahedral and amorphous phases is close to Zr75Cu15Al5O5and Zr62Cu24Al14, respectively.