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納米SiC顆粒增強(qiáng)AZ91D復(fù)合材料的制備及性能
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Preparation and Properties of Nano-Sized SiC Particles Reinforced AZ91D Magnesium Matrix Composites
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    摘要:

    利用高能超聲輔助法制備納米SiC顆粒（n-SiCp）增強(qiáng)AZ91D鎂基復(fù)合材料（n-SiCp/AZ91D），并對(duì)其顯微結(jié)構(gòu)和室溫力學(xué)性能進(jìn)行測(cè)試分析。結(jié)果表明：納米SiC顆粒的加入能夠起到細(xì)化晶粒的作用，納米顆粒在基體中的分布比較均勻，超聲波輔助技術(shù)能夠有效地分散納米顆粒，在重力鑄造下所制備的復(fù)合材料的抗拉強(qiáng)度、屈服強(qiáng)度和硬度均高于基體，尤其是屈服強(qiáng)度較基體提高了57%。

    Abstract:

    Magnesium matrix composites reinforced with nano-sized SiC particles (n-SiCp/AZ91D) were fabricated by high intensity ultrasonic assisted casting. The microstructure of the nanocomposites was investigated by optical microscopy, scanning electronic microscopy (SEM) methods and room-temperature mechanical properties were measured using a universal electronic material tester. The results showed that n-SiCp addition can refine the grains, and the distribution of n-SiCp in magnesium alloy melts is significantly improved by ultrasonic processing. Compared with the unreinforced AZ91D matrix, mechanical properties of the nanocomposites including tensile and yield strengths and hardness are remarkably improved; in particular the yield strength is increased by 57% after gravity permanent mould casting.

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劉世英,李文珍,賈秀穎,高飛鵬,張瓊元.納米SiC顆粒增強(qiáng)AZ91D復(fù)合材料的制備及性能[J].稀有金屬材料與工程,2010,39(1):134~138.[Liu Shiying, Li Wenzhen, Jia Xiuying, Gao Feipeng, Zhang Qiongyuan. Preparation and Properties of Nano-Sized SiC Particles Reinforced AZ91D Magnesium Matrix Composites[J]. Rare Metal Materials and Engineering,2010,39(1):134~138.]
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  • 收稿日期:2009-01-10
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