Effect of Gd content on interfacial microstructures and mechanical properties of Cf/Mg composite. (January 2015)

• Record Type: Journal Article
• Authors: Zhang, Shaofeng; Chen, Guoqin; Pei, Risheng; Hussain, Murid; Wang, Yaping; Li, Daguang; Wang, Pingping; Wu, Gaohui
• Is Part Of: Materials & design. Volume 65(2015:Jan.)
• Page Start: 567
• Page End: 574
• Publication Date: 2015-01
• Subjects: Metal matrix composites -- Matrix alloying -- Interface -- Mechanical properties; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2014.09.045
• Languages: English
• ISSNs: 0264-1275

Abstract

Highlights: The Gd element is prone to segregate to the interface between the fiber and matrix. Interfacial products including Gd2 O3 and Mg7 Gd are observed at interface. ILSS of Cf /Mg–3.2Gd composite is increased by 60.4% compare to that of Cf /Mg composite. Abstract: Matrix alloying is an effective and convenient method to improve the interface bonding strength for continuous carbon fiber reinforced magnesium matrix composites. In this work, rare earth metal Gd was selected as an alloying element to improve the interface bonding of Cf /Mg composite. Cf /Mg composites with different Gd content were fabricated by pressure infiltration method. The effect of Gd addition on the interfacial microstructures and mechanical properties of the composites were investigated. The results showed that the rare earth Gd tended to segregate at interface area to form Gd2 O3 layer and particle phase Mg7 Gd. Both the interfacial products enhanced the interface bonding strength which can be identified by the increase of interlaminar shear strength (ILSS). In particular, the Gd addition promoted the ILSS and bending strength greatly, with an increase by 60.4% and 25.3% compared with Cf /Mg composite, respectively. The fracture surfaces of the composites were examined by scanning electron microscopy and micrographs were employed to explain the inherent relation between interface characterization and mechanical properties.