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近年来,人们在对金属玻璃晶化研究的基础上,发明了一种新型的工程材料一微晶合金。具有独特成分的快速凝固金属玻璃合金,当其在远高于晶化温度(T_e)下进行热处理时,就反玻璃化为多相微晶合金。经研究表明,这种合金不仅具有很高的强度(一般其拉伸强度极限高于130公斤/毫米~2),而且有很好的塑性和韧性。在高温下具有优异的热稳定性,耐蚀性也异常之好。此外,还可将这种合金制成块状,适于工程结构件的应用。据报导,目前美国已将块状微晶合金用于制造飞机发动机的涡轮盘和叶片以及其它方面。按照微晶合金的成分特征,组织结构和制造工艺,它已成为独立于其它材料的一种新型材料。本文拟根据近期文献,对这种新型材料作一概述。
In recent years, people on the basis of the study of the crystallization of metallic glass, invented a new type of engineering materials, a micro-crystalline alloy. Rapidly solidified metallic glass alloys with unique compositions de-vitrify into a multiphase microcrystalline alloy when heat treated at temperatures well above the crystallization temperature (T_e). The study shows that this alloy not only has a high strength (usually its tensile strength above 130 kg / mm2), but also has good ductility and toughness. Excellent thermal stability at elevated temperatures and good corrosion resistance. In addition, this alloy can also be made into a block, suitable for engineering structural components. It has been reported that the United States currently uses massive microcrystalline alloys for the manufacture of turbine disks and blades for aircraft engines and others. It has become a new material independent of other materials, according to the composition, structure and manufacturing process of the microcrystalline alloy. This article is based on recent literature, an overview of this new material.