Amorphous Zr-Based Foams with Aligned,Elongated Pores |
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| Authors: | Marie E Cox Suveen N Mathaudhu K Ted Hartwig David C Dunand |
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| Affiliation: | (1) Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA;(2) United States Army Research Laboratory, Weapons and Materials Research Directorate, Aberdeen Proving Ground, MD 21005, USA;(3) Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA; |
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| Abstract: | Interpenetrating phase composites are created by warm equal channel angular extrusion (ECAE) of blended powders of amorphous
Zr58.5Nb2.8Cu15.6Ni12.8Al10.3 (Vit106a) and a crystalline ductile metal (Cu, Ni, or W). Subsequent dissolution of the continuous metallic phase results
in amorphous Vit106a foams with ~40 pct aligned, elongated pores. The extent of Vit106a powder densification in the composites
improves with the strength of the crystalline metallic powder, from low for Cu to high for W, with a concomitant improvement
in foam compressive strength, ductility, and energy absorption. |
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