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利用电子显微镜分析研究了SiC2/6061Al复合材料的界面相。电子衍射分析表明,SiCw/6061Al面相 体心立方结构,点阵常数为1.28nm用X-射线能谱仪测定了界面相的化学成分。 相似文献
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Temperature Dependence of Elastic Properties for Amorphous SiO2 by Molecular Dynamics Simulation 下载免费PDF全文
Large-scale and long-time molecular-dynamics simulations are used to investigate the temperature dependences of elastic properties for amorphous SiO2. The elastic moduli increase in a temperature range up to 1600 K and decrease thereafter. The anomalous behaviour in elasticity is explained by analysing the changes of atomic-scale structure with respect to increment of temperature. The mechanism originates predominantly from distortion of the SiO4 tetrahedra network in low-temperature ranges. At an elevated temperature range, thermal-induced Si-O bond stretching dominates the process and leads to normal temperature dependence of elastic properties. 相似文献
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