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激光照射sic纳米颗粒原位生成sic晶须

Keywords: 材料合成与加工工艺,sic晶须,激光照射

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Abstract:

?以激光为热源,以sic纳米颗粒材料为前驱体,用激光照射sic纳米颗粒原位生长晶须.结果表明:由于激光能量输出的瞬时特性,sic纳米颗粒受到激光的照射可瞬时生成sic晶须.随着激光功率的提高,晶须的直径从纳米级增大到微米级.由于在激光光斑内能量呈高斯分布,光斑内不同区域的sic颗粒的温度不同,致使生成的晶须形态在不同的区域分别呈现为团絮状、网状和棒状等.x射线衍射分析表明,激光照射sic纳米颗粒原位生长的晶须具有很高的纯度.

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