Compositional dependence of fragility and glass forming ability of calcium aluminosilicate melts
Compositional dependence of fragility and glass forming ability of calcium aluminosilicate melts
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DOI：
10.1016/j.jnoncrysol.2009.04.004
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发表时间：
2009-06-01
影响因子：
3.5
通讯作者：
Yue, Yuanzheng
中科院分区：
文献类型：
--
作者：
Moesgaard, Mette;Yue, Yuanzheng
通过测定两个系列的钙铝硅酸盐熔体的粘性行为和析晶倾向，研究了其玻璃形成能力与组成的关系。第一系列由钙长石-硅灰石-鳞石英共晶点与钙长石-硅灰石-钙铝黄长石共晶点交界线上的五种成分组成。该系列包括作为端元的共晶组合物。第二系列由平行于富含氧化铝侧的连接线的线上的五种组合物组成。在目前的工作中。GFA以玻璃稳定性来描述。Hruby参数（K-H）[A. Hruby，捷克人。J. Phys. B 22（1972）1187]中所述的玻璃稳定性。根据粘度法研究过冷熔体的粘性行为，导出脆性（m）。结果表明，在两个系列的熔体中，In与K-H成反比，建议用In作为GFA的间接度量。然而，这种比例仅适用于组分系统替代系列中玻璃的比较。一般来说，在两种共晶成分之间的结合线上的熔体具有上级GFA。在每个系列内，GFA作为网络聚合的函数而增加。(C)2009 Elsevier B. V.保留所有权利。
The compositional dependence of glass forming ability (GFA) of two series Of Calcium aluminosilicate melts is studied by measuring their viscous behavior and crystallization tendency. The first series consists of five compositions on the joining line between the eutectic point of anorthite-wollastonite-tridymite and that of anorthite-wollastonite-gehlenite. The series includes the eutectic compositions as end members. The second series consists of five compositions on a line parallel to the joining line oil the alumina rich side. In the present work. GFA is described in terms of glass stability. The Hruby parameter (K-H) [A. Hruby, Czech. J. Phys. B 22 (1972) 1187] obtained from calorimetric data is used as a measure of glass stability. From the viscous behavior of the undercooled melts studied by viscometry the fragility (m) is derived. The results show that in is inversely proportional to K-H for the two series of melts, proposing in as an indirect measure of GFA. However, this proportionality is only valid for comparison of the glasses in the series of systematic substitutions of components. In general, the melts oil the joining line between the two eutectic compositions are found to have superior GFA. Within each series GFA increases as a function of the network polymerization. (C) 2009 Elsevier B.V. All rights reserved.