EASY GLASS-FORMATION IN MG64NI21ND15 BY BRIDGMAN SOLIDIFICATION

被引：28

作者：

LI, Y ^{[1
]}

LIU, HY ^{[1
]}

DAVIES, HA ^{[1
]}

JONES, H ^{[1
]}

机构：

[1] UNIV SHEFFIELD,DEPT ENGN MAT,SHEFFIELD S1 4DU,ENGLAND

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1994年 / 179卷 / pt 1期

关键词：

D O I：

10.1016/0921-5093(94)90281-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Easy glass-forming Mg64Ni21Nd15 alloy was subjected to Bridgman steady state directional solidification at growth velocities between 0.5 and 2.4 mm s-1 through a temperature gradient of about 15 K mm-1. X-ray diffraction (XRD) indicated crystalline solidification structure at 0.5 and 1.0 mm s-1, amorphous with some residual crystallinity at 1.7 mm s-1 and fully amorphous at 2.4 mm s-1. The strongest XRD peaks at 0.5 and 1.0 mm s-1 correspond to Mg3Nd, the other phases present being, as yet, unidentified. Values of T(g) and T(x) of 467 K and 507 K respectively, determined by differential scanning calorimetry for the amorphous condition, match well our previous determinations from chill-cast or melt-spun ribbon of similar alloy composition. The significance of these results for an improved understanding of glass formation in this and related easy glass-forming systems is discussed.

引用

页码：628 / 631

页数：4

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