Enhanced mechanical performance of Mg metallic glass with porous Mo particles

Abstract

We present a porous ductile Mo particles reinforced Mg-based metallic glass composite, exhibiting superior mechanical performance with up to 10% compressive strain and 1100 MPa stress at room temperature. For a given amount of particles, the porous particles will generate more interfaces between the reinforcements and matrix and, thus, can confine lots of microsized compartments of the Mg based glassy phase within the porous particles. This promotes the deformation to distribute more uniformly across the specimens, improving the ductility. We suggest that porous ductile particles might preferably be used to toughen amorphous materials with stubborn brittleness.

Analysis of plastic strain and deformation mode of a Zr-based two-phase bulk metallic glass in compression

“…Intensive efforts have been made and two promising approaches have been developed. One approach is the intrinsic toughening by increasing the Poisson's ratio [8,9] or the amount of free volume in BMG [10], and another approach is the extrinsic toughening by developing a composite microstructure with ductile metals dispersed within the glassy matrix or phaseseparated dual phase glasses [11][12][13][14][15][16][17]. These approaches are designed with the goal to block or hinder propagating shear bands during deformation.…”

Tailoring Microstructures and Mechanical Properties of Zr‐Based Bulk Metallic Glass Matrix Composites by the Bridgman Solidification

“…[1][2][3][4] To overcome this problem, many in-situ and ex-situ BMG matrix composites are synthesized by various processing methods, which, combining the high yielding strength and improved ductility, renders them potential candidates for use as engineering materials. [5][6][7][8][9][10][11][12] Among these composites, the most common are in-situ composites developed by the copper-mould suction casting due to the convenient and easy fabrication. Multiple shear bands are formed in the BMG matrix so that the catastrophic instability along the localized shear band could be avoided by the soft crystalline phase.…”

Effect of Al addition to Rapidly Solidified Mg-Cu-Rare Earth Alloys

“…(ii) Introducing long scale heterogeneities, such as partial crystallization of an intermetallic phase or manufacturing composites containing for example, ceramic particles 12 , ductile metals [13][14][15] and even α-Mg solid solution 16 as a second phase component.…”