Abstract
Here, we elucidate the significant impact of carbon nanotubes (CNTs) on the electrochemical behavior of Mg-based amorphous composite materials that were reinforced with CNTs while using pressure die casting. The addition of 3 vol % CNTs led to an increase in the compressive strength of Mg-based amorphous material from 812 MPa to 1007 MPa, and the fracture strain from 1.91% to 2.67% in the composite. Interestingly, the addition of CNTs significantly contributed to the enhancement of corrosion resistance of Mg-based glass by ~30%. The superior mechanical properties are primarily related to the fact that the addition of CNTs hindered the growth of shear bands (cracks), while the high corrosion resistance is related to inferior wettability and the bridging effect between adherent corrosive oxide film and the matrix that provided enhanced corrosion resistance.
Highlights
Amorphous alloys are being given increased attention since their birth due to their high strength, high hardness, and high corrosion resistance, etc
carbon nanotubes (CNTs), together with the patterns that were obtained from the composites with 3 vol % CNTs, together with the XRD patterns that were obtained from the crosscross-sectional surface of the rod of and composite materials
The CNTs-Mg based amorphous composites were successfully prepared by water cooled copper die casting
Summary
Amorphous alloys are being given increased attention since their birth due to their high strength, high hardness, and high corrosion resistance, etc. Mg-based bulk metallic glasses (BMGs) are relatively new materials for various engineering applications due to their superior mechanical properties and corrosion resistance [1,2]. BMGs attracted significant attention as a new class of biodegradable materials [3]. Some of their properties (e.g., strength, hardness, etc.) have been observed to be superior as compared to their crystalline counterparts. Mg-based amorphous alloys or BMGs have been developed since the preparation of Mg70 Zn30 metallic glass in 1977 [4]. Majority of the glass-forming compositions are based on Mg-TM-RE or
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