Non-isothermal and isothermal oxidation studies of quaternary and quinary Zr-based metallic glasses have been carried out in static air and their relative oxidation behavior has been studied. Effect of different structures developed during controlled heat treatment and the effect of alloying elements on the oxidation behavior of the alloys have been discussed. The oxidation kinetics follow parabolic rate law in these glasses. © 2006 Elsevier B.V. All rights reserved.

Budaraju Srinivasa Murty

Department of Metallurgical and Materials Engineering

Alloying elements

Heat treatment

Metallic glass

oxidation

Reaction kinetics

Zirconium alloys

CONTROLLED HEAT TREATMENT

ISOTHERMAL OXIDATION

PARABOLIC RATE LAW

STATIC AIR

Amorphous alloys

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IIT Madras

Journal of Alloys and Compounds

The extent of oxidation and mechanism involving glassy and nanocrystalline phases are found to be different than that in case of normal crystalline metals and alloys. A short review on oxidation behavior of metallic glass and nanocrystalline alloys is presented in the light of work by the present authors and other researchers. The main factors, which are important in controlling the oxidation of metallic glass, are: (i) structure of glass and its devitrified states, (ii) composition of the alloy, and (iii) structure of the oxide layer. Hence, these factors are discussed with the help of isothermal and non-isothermal oxidation both in air and in the presence of oxygen of a number of Zr-based glassy alloys. The oxidation resistance of the glassy alloys decreases in the following order: microcrystalline alloy > fully nanocrystalline alloy > partially nanocrystalline alloy > relaxed amorphous alloy > quenched amorphous Zr-based alloy. © 2015, The Indian Institute of Metals - IIM.

Transactions of the Indian Institute of Metals

Factors Influencing Oxidation Behavior of Metallic Glasses

The oxidation behavior of melt-spun Zr75Pd25 and Zr80Pt20 alloys with nanoquasicrystalline phase embedded in amorphous matrix has been studied isothermally as well as nonisothermally in static air. The nature of oxides formed during oxidation has been studied by x-ray diffraction and scanning electron microscopy, and a transition in the structure of the oxides has been shown as one of the primary reasons for the difference in the oxidation behavior of the alloys. © 2006 Materials Research Society.

Journal of Materials Research

Surface oxides and their effect on the oxidation behavior of amorphous and nanoquasicrystalline Zr-Pd and Zr-Pt alloys

Intermetallics

Effect of Zr-content on the oxidation and phase transformation of Zr-base amorphous alloys in air

Journal	Journal of Alloys and Compounds
ISSN	09258388
Open Access	No