Systems and Methods Implementing Layers of Devitrified Metallic Glass-Based Materials

Abstract

Systems and methods in accordance with embodiments of the invention implement layers of devitrified metallic glass-based materials. In one embodiment, a method of fabricating a layer of devitrified metallic glass includes: applying a coating layer of liquid phase metallic glass to an object, the coating layer being applied in a sufficient quantity such that the surface tension of the liquid phase metallic glass causes the coating layer to have a smooth surface; where the metallic glass has a critical cooling rate less than 106 K / s; and cooling the coating layer of liquid phase metallic glass to form a layer of solid phase devitrified metallic glass.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The current application claims priority to U.S. Provisional Application No. 62 / 293,210, filed Feb. 9, 2016, the disclosure of which is incorporated herein by reference.STATEMENT OF FEDERAL FUNDING[0002]The invention described herein was made in the performance of work under a NASA contract NNN12AA01C, and is subject to the provisions of Public Law 96-517 (35 U.S.C. 202) in which the Contractor has elected to retain title.FIELD OF THE INVENTION[0003]The present invention generally regards layers of devitrified metallic glass-based materials, and techniques for fabricating such layers.BACKGROUND[0004]Metallic glasses, also known as amorphous metals, have generated much interest for their potential as robust engineering materials. Metallic glasses are characterized by their disordered atomic-scale structure in spite of their metallic constituent elements—i.e. whereas conventional metallic materials typically possess a highly ordered atomic s...

AI Technical Summary

Benefits of technology

The patent describes a method for creating layers of devitrified metallic glass-based materials using a liquid phase metallic glass. The method involves applying the liquid phase metallic glass to an object and solidifying it to form a solid phase devitrified metallic glass-forming coating. The coating can be nanocrystalline or have a higher hardness and stiffness than the underlying object. The method can be used on a variety of objects made of metal, polymer, ceramic, or glass, and can be carried out under vacuum or inert environment. The technical effects of the invention include improved mechanical properties, enhanced corrosion resistance, and improved surface smoothness of the coated object.

Problems solved by technology

Nonetheless, the manufacture and implementation of metallic glasses present challenges that limit their viability as engineering materials.

The first metallic glasses required extraordinary cooling rates, e.g. on the order of 106 K / s, to avoid crystallization, and were thereby limited in the thickness with which they could be formed because thicker parts could not be cooled as quickly.

Indeed, because of this limitation in thickness, metallic glasses were initially largely limited to applications that involved coatings.

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