The Stability of Amorphous Metals in Corrosive Environments

通过快速凝固工艺生产的许多玻璃状和结晶固体具有显著的机械、磁性和电学性能，因此具有巨大的潜在商业用途。然而，如果这些合金在使用过程中所处的环境没有化学稳定性，它们不寻常的特性就会丧失。与传统加工的合金相比，一些金属玻璃更具惰性。当前研究的目的是检验这类合金的耐腐蚀性，并为理解它们的行为奠定基础。研究了钕铁硼合金体系在碱性环境中的腐蚀行为。当与中性硫酸盐和氯化物中的锌偶联时，研究了其对氢损伤的敏感性。利用透射电镜研究了该体系的优先溶解。研究结果将为在不影响其磁性能的情况下提高这些磁性有趣的快速凝固合金的耐腐蚀性提供信息。这项腐蚀研究计划将为保护快速凝固的合金提供信息，这些合金具有工业上有用的磁性，但在使用环境中缺乏化学稳定性。＊＊＊

9408749 Latanision Many glassy and crystalline solids produced by rapid solidification processing have remarkable mechanical, magnetic, and electrical properties and, accordingly, great potential commercial utility. Without chemical stability in the environments to which these alloys may be exposed while in service, however, their unusual properties may be lost. Some metallic glasses are more inert compared to conventionally processed alloys. The objective of the current research is to examine the corrosion resistance of such alloys and to develop a fundamental basis for understanding their behavior. Corrosion behavior of the neodymium-iron-boron alloy system is explored in alkaline environments. Its susceptibility to hydrogen damage is examined when coupled to zinc in neutral sulfates and chlorides. Transmission electron microscopy foils are employed to study preferential dissolution in this system. Results of the research should provide information for improving the corrosion resistance of these magnetically interesting rapidly-solidified alloys without compromising their magnetic properties. %%% This corrosion research program will provide information for the protection of rapidly solidified alloys which have industrially useful magnetic properties, but lack chemical stability at service environments. ***