Interface structure between magnesium matrix and SiCp

ABSTRACT

The microstructure of magnesium matrix composite (MMC) was investigated by transmission electron microscopy, and fracture behaviour of composite by step-by-step tensile in the strain range of 0.8–2.0% has been determined using the dislocation and microcrack analysis. The results indicated that the interface between matrix and double-sized SiC particle (SiCp) showed a good combination. With increasing the strain from 0 to 2.0%, the dislocation density was gradually increased, especially in the interface of SiCp/matrix. Some microcracks can be found in the interface between micrometre-SiCp and matrix while no microcracks were observed around nano-SiCp.

KEYWORDS:

• Magnesium matrix composite
• microstructure
• fracture behaviour
• interface
• bimodal-sized SiCp
• dislocation
• microcrack
• mechanical properties

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by National Natural Science Foundation of China [grant number 51701108] and China Postdoctoral Science Foundation [grant number 2019M653526].