| 纳米Si3N4对反应烧结Si3N4结合SiC材料的影响 |
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| 引用本文： | 何钢,石磊,吕珺,郑治祥.纳米Si3N4对反应烧结Si3N4结合SiC材料的影响[J].合肥工业大学学报(自然科学版),2001,24(1). |
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| 作者姓名： | 何钢 石磊 吕珺 郑治祥 |
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| 作者单位： | 合肥工业大学 材料科学与工程学院, |
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| 摘 要： | 利用反应烧结机制 ,在 14 5 0℃制备了 Si3N4结合 Si C材料 ,研究表明 ,在引入微量纳米 Si3N4粉后 ,材料的力学性能得到明显提高 ,材料的组织也更加致密和均匀。通过 X-ary、扫描电镜等技术手段分析表明 ,由于纳米 Si3N4粉的高表面能、高活性以及颗粒小等特点 ,加大了反应生成的 Si3N4在纳米 Si3N4上沉积的几率 ,增大了氮化率 ,效果显著
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| 关 键 词： | Si3N4结合SiC 纳米Si3N4 反应烧结 |
The effect of nano-Si3N4 on the sintering of Si3N4 r eaction bonded SiC material |
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| HE Gang,SHI Lei,LU Jun,ZHENG Zhi-xiang.The effect of nano-Si3N4 on the sintering of Si3N4 r eaction bonded SiC material[J].Journal of Hefei University of Technology(Natural Science),2001,24(1). |
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| Authors: | HE Gang SHI Lei LU Jun ZHENG Zhi-xiang |
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| Abstract: | Si3N4 reaction bonded SiC with the addition of a small amount of nano-Si3N4 was produced at 1 450 ℃. The result showed that the mechanic properties of the material were greatly improved. The microstructu re of the material became more uniform. The mechanism of the strength improvemen t of the material was attributed to the addition. The nano-Si3N4 properties of high surface energy,high activity and small size particles increased the dep osit of Si3N4 reacted on the nano-Si3N4 and the nitriding rate of Si,th en improved the properties of the material. |
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| Keywords: | Si 3N 4 reaction bonded SiC nano-Si 3N 4 reaction sintering |
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