Acta Metall Sin  1998, Vol. 34 Issue (4): 443-448    DOI:

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THE INTERFACE MICROSTRUCTURE OF A B_4C_p +SiC_w/MB15 MAGNESIUM BASED COMPOSITE

WU Zhengan; GU Mingyuan; CHEN Yu; ZHANG Gooding (The State Key Laboratory of MMCs; Shanghai Jiaotong University; Shanghai 200030)

WU Zhengan; GU Mingyuan; CHEN Yu; ZHANG Gooding (The State Key Laboratory of MMCs; Shanghai Jiaotong University; Shanghai 200030). THE INTERFACE MICROSTRUCTURE OF A B_4C_p +SiC_w/MB15 MAGNESIUM BASED COMPOSITE. Acta Metall Sin, 1998, 34(4): 443-448.

Abstract References Related Articles Recommended Metrics Download:  PDF(2878KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The magnesium alloy (MB15) matrix composites reinforced by the hybrid ofthe boron carbide particle and the silicon carbide whisker were fabricated with vacuum pressure infiltration and hot extrusion techniques. The interface microstructure of the composite has been studied using analytical electron microscope (equipped with EDS, EELS). Experimental results showed that the chemical reaction 4Mg(1)+B2O3(1)=MgB2(s)+3MgO(s) took place during infiltration, and produced magnesium diboride (MgB2) phase and MgO microcrystallites. Due to this interface reaction, liquid magnesium wetted boron carbide particle. Moreover, the surface of boron carbide particle had a serrated periphery, thus a strong interfacial bonding was formed,which resulted in excellent mechanical properties of the composite. Because of the flowabilityof boron chide, the same interfacial reaction also took place at the SiCw/Mg interface region,where the SiC whisker is near a boron carbide particle. When the SiC whisker is far from a boroncarbide particle, the SiCw/Mg interface is straight with β' (MgZn2) precipitates on it. Key words:  boron carbide      silicon carbide whisker      magnesium based composite      interface      microstructure      Received:  18 April 1998      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I4/443 1 猪濑康之,金子纯一,营又信.轻金属,1990;40:221(Inose Y, Kaneko J, Sugamata M. J Jpn Inst Light Met, 1990; 40: 221) 2 Badini C, Marino F, Montorsi M, Guo X B. Mater Sci Eng, 1992; A157: 53 3 吴桢干, 顾明元, 张国定. 无机材料学报, 1997; 12: 370(WU Zhengan, GU mingyuan, ZHANG Guoding. J Inorp Mater, 1997; 12. 370) 4 Ahn C C, Krivanek O L. 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