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粉末冶金法制備SiC晶須增強MB15鎂基復合材料
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TB333

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國家自然科學基金(59771016)，科技部重大項目前期專項(02061005)，陜西省自然科學基金(2003E117)資助


SiC Whiskers-reinforced MB15 Magnesium Matrix Composites by Powder Metallurgy
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    摘要:

    采用粉末冶金法制備了SiC晶須增強鎂基復合材料(SiCW／MB15)試樣。通過檢測基體顯微硬度探討了SiCW對鎂合金時效規(guī)律的影響，并借助掃描電鏡(SEM)、透射電鏡(TEM)和拉伸試驗，研究了混粉方式對復合材料室溫力學性能、SiCW分布及顯微結構的影響。結果表明，MB15及其復合材料的時效硬化曲線上均存在雙峰現(xiàn)象；SiCW的加入既提高了MB5的硬度，又加快了其時效速度：混粉方式對晶須分布及SiCW／MB15復合材料的室溫力學性能影響很大。

    Abstract:

    Specimens of MB15 magnesium alloy reinforced with SiC whiskers (SiCw/MB15) were fabricated using powder metallurgy route (PM). The influence of SiCw on the 150oC aging behavior of MB15 alloy was investigated by microhardness-testing, and SEM, TEM and tensile tests studied the influence of powder-mixing methods on the distribution of SiCw and the mechanical properties of SiCw/MB15. The results reveal that the double peaks exist in the age-hardening curves of both the unreinforced and the reinforced MB15 alloy, and the addition of SiCw can accelerate the age-hardening process of MB15 alloy apart from increasing its micro- hardness, moreover, the mechanical properties of SiCw/MB15 composite are significantly influenced by powder-mixing methods of PM.

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郗雨林 柴東朗 張文興 席生歧 周敬恩.粉末冶金法制備SiC晶須增強MB15鎂基復合材料[J].稀有金屬材料與工程,2005,34(7):1131~1134.[Xi Yulin, Chai Donglang, Zhang Wenxing, Xi Shengqi, Zhou Jingen. SiC Whiskers-reinforced MB15 Magnesium Matrix Composites by Powder Metallurgy[J]. Rare Metal Materials and Engineering,2005,34(7):1131~1134.]
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  • 最后修改日期:2004-10-09
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