Tensile and Compressive Responses of Ceramic and Metallic Nanoparticle Reinforced Mg Composites

Materials

Khin Sandar Tun¹  Wai Leong Eugene Wong²  Quy Bau Nguyen¹ 

[1] Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore; E-Mails:;School of Mechanical and Systems Engineering, Newcastle University International Singapore (NUIS), 180 Ang Mo Kio Ave 8, 569830, Singapore; E-Mail:

关键词: metal matrix composites;    microwave sintering;    mechanical properties;    microstructure;    scanning electron microscopy;    X-ray diffraction;   

DOI  :  10.3390/ma6051826

来源: mdpi

【 摘 要 】

In the present study, room temperature mechanical properties of pure magnesium, Mg/ZrO₂ and Mg/(ZrO₂ + Cu) composites with various compositions are investigated. Results revealed that the use of hybrid (ZrO₂ + Cu) reinforcements in Mg led to enhanced mechanical properties when compared to that of single reinforcement (ZrO₂). Marginal reduction in mechanical properties of Mg/ZrO₂ composites were observed mainly due to clustering of ZrO₂ particles in Mg matrix and lack of matrix grain refinement. Addition of hybrid reinforcements led to grain size reduction and uniform distribution of hybrid reinforcements, globally and locally, in the hybrid composites. Macro- and micro- hardness, tensile strengths and compressive strengths were all significantly increased in the hybrid composites. With respect to unreinforced magnesium, failure strain was almost unchanged under tensile loading while it was reduced under compressive loading for both Mg/ZrO₂ and Mg/(ZrO₂ + Cu) composites.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.