Abstract
This review deals with the processing and properties of novel lightweight metal matrix composites. Conventionally, hard and strong ceramic particles are used as reinforcement to fabricate metal matrix composites (MMCs). However, the poor mechanical properties associated with the interfacial de-cohesion and undesirable reactions at (ceramic) particle–(metallic) matrix interface represent major drawbacks. To overcome this limitation, metallic amorphous alloys (bulk metallic glass) have been recently identified as a promising alternative. Given the influential properties of amorphous metallic alloys, their incorporation is expected to positively influence the properties of light metal matrices when compared to conventional ceramic reinforcement. In view of this, a short account of the existing literature based on the processing and properties of Al- and Mg-matrix composites containing amorphous/bulk metallic glass (BMG) reinforcement is presented in this review.
Highlights
Metallic glasses are novel metallic materials that exhibit superior properties such as high strength (~2 GPa) and elastic strain limit (~2%) [1]
The reinforcement/matrix interface being metallic in nature is expected to negate the adverse effects experienced in conventional ceramic reinforced composites [4]
Structural and mechanical property measurements were performed and the results revealed coarsening of Al-grains due to the dispersion of Fe-based bulk metallic glass (BMG) particles
Summary
Metallic glasses are novel metallic materials that exhibit superior properties such as high strength (~2 GPa) and elastic strain limit (~2%) [1]. Compression property measurements conducted on the composite samples showed enhanced yield and fracture strength resulting from the nanostructure of the Al-matrix and the uniform distribution of the amorphous reinforcement particles. The required amount (3, 5, 10 vol%) of Ni60Nb40 BMG reinforcement was mixed with pure Mg powder and the mixture was blended in a planetary ball mill for 1 h This was followed by the densification of the blended composite powder using uniaxial cold compaction and rapid microwave sintering. The results of structural characterization by X-ray analysis, optical and electron microscopy revealed matrix grain refinement (Figure 12), uniform distribution of reinforcement at low volume fraction and agglomeration at high volume fractions (Figure 13), absence of interfacial reaction production (Figure 13d) and the retention of the reinforcement’s amorphous structure at all volume fractions (Figure 14a). Sanakranarayanan et al 2015 [17], with permission from © Elsevier)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
