Industrial grade versus scientific pure: Influence on melt properties
Industrial grade versus scientific pure: Influence on melt properties
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DOI：
10.1063/1.5021764
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发表时间：
2018-04-23
影响因子：
4
通讯作者：
Meyer, A.
中科院分区：
文献类型：
--
作者：
Jonas, I.;Hembree, W.;Meyer, A.
研究了两种不同纯度的锆基块体玻璃形成熔体的粘度、密度和过冷能力。已经进行了调查，通过Couette流变仪和静电和电磁悬浮与后者在微重力条件下。我们发现，工业级金属中存在的氧和杂质不会显著改变熔体粘度和密度，而它们明显影响过冷能力。比较基于容器和无容器的结果表明，Couette流变仪可以在1150 K和1375 K之间的温度范围内应用，在那里它提供可靠的数据，但仅在相当低的氧含量下。较高的氧含量，如在工业级合金的情况下，导致测量伪像。在Zr59.3Cu28.8Al10.4Nb1.5合金的情况下，这些发现允许更好地本地化的关键因素主导的玻璃形成能力。出版社：AIP Publishing
Viscosity, density, and the undercooling ability of the Zr-based bulk glass forming melt, which was manufactured in two different degrees of purity, have been studied. Investigations have been carried out by means of Couette rheometry and electrostatic and electromagnetic levitation with the latter under microgravity conditions. We found that oxygen and impurities present in industrial grade metals do not significantly alter the melt viscosity and density, while they clearly affect the undercooling ability. Comparing container based and containerless results showed that Couette rheometry can be applied in the temperature range between 1150 K and 1375 K, where it provides reliable data, but only at a rather low oxygen content. Higher oxygen contents, as in the case of the industrial grade alloy, cause measurement artefacts. In the case of Zr59.3Cu28.8Al10.4Nb1.5 alloys, these findings allow a better localization of the key factors dominating the glass forming ability. Published by AIP Publishing.