Recent Topics on the Structure and Crystallization of Al-based Glassy Alloys

Abstract

Al-based glassy alloys (metallic glasses) have been of great scientific and technological interest as a high specific strength and high corrosion resistant materials. However, the low glass-forming ability (GFA) is still a choke point that greatly influences the applications. In order to further comprehend the glass formation mechanism and investigate the possibility of enhancing the GFA, it is important to obtain the definite information on the atomic scale glassy structures in correlation with properties and to study the composition dependence of crystallization and properties of Al-based metallic glasses. The purpose of this paper is to summarize the structure characteristics and crystallization behavior in conjunction with alloy component in Al-based metallic glasses and to investigate the possibility of synthesizing an Al-based bulk metallic glass with better engineering performances. This may assist to learn the structural features systematically and understand the development and current status for Al-based metallic glasses.

Corrosion of Al85Ni9Ce6 amorphous alloy in the first hours of immersion in 3.5‐wt% NaCl solution: The role of surface chemistry

“…The electrolyte was chosen as a general corrosive medium, allowing one to compare the data obtained in the present work with those found in the current literature. Corrosion resistance is reported to be of prime interest to the practical applications of Al‐RE‐TM metallic glasses as protective coatings of structural materials. The Al 85 Ni 9 Ce 5 alloy was selected to represent the Al‐Ni‐Ce system because of its relatively good corrosion resistance as reported elsewhere.…”

High-pressure phases in the Al86Ni6Gd4Tb2Er2 alloy

“…В рамках такого направления исследований в последних наших работах [12 -14] мы использовали совместно высокие температуры и быструю закалку из расплава, одновременно воздействуя на расплав высоким давлением (несколько ГПа) применительно к сплавам на основе алюминия типа Al-ПМ-РЗМ. Сплавы данного типа как в литом, так и в аморфно-нанокристаллическом состоянии представляют большой интерес вследствие их высоких технологических свойств и широкого использования в различных областях промышленности [15,16]. Показана возможность модифицирования структуры, получение новых фаз и аномально пересыщенных твердых растворов в модельных сплавах Al 90 Y 10 и Al 87 Ni 8 Y 5 [12 -14].…”

“…Исследуемый сплав, а также исследованные нами ранее сплавы Al 90 Y 10 и Al 87 Ni 8 Y 5 являются стеклообразующими [10,15,16]. В выбранных условиях затвердевания аморфные фазы не обнаружены.…”

Isokinetic Analysis of Fe41Co7Cr15Mo14Y2C15B6 Bulk Metallic Glass: Effect of Minor Copper Addition

“…For instance, in BMGs with a maximum nucleation and the minimum growth rates, crystallization process can take place partially by controlling the kinetic parameters and as a result an amorphous matrix nanocomposite can be produced with excellent mechanical and magnetic properties [ 27 , 28 , 29 ]. On the other hand, the presence of alloying elements can strongly control the size of crystalline particles during annealing process [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. For instance, Lesz et al [ 32 ] studied the effect of Ni addition on the thermal properties of a Fe-based amorphous alloy.…”