高压下SiC增强Al基纳米复合材料

SYNTHESIS OF SiC p/Al NANOCOMPOSITE UNDER ULTRA HIGH PRESSURE

采用高压技术合成了纳米尺寸ＳｉＣ颗粒增强Ａｌ基复合材料，针对合成中增强相与基体的化学反应行为、增强相与基体界面结合等问题进行了研究。Ｘ射线衍射、高分辨率、正电子湮没以及显微硬度结果表明：高压技术在合成ＳｉＣｐ／Ａｌ纳米复合材料中，具有抑制界面反应、提高致密度、改善界面结合等优点。

SiC nanoparticle reinforced Al matrix composite has been synthesized under the ultra high pressure.X ray diffractometer(XRD),high resolution electron microscopy(HREM),positron annihilation and Vickers microhardness measurements have been used to evaluate the chemical reaction and the bonding behavior between the reinforced phase and the matrix.Results demonstrate that ultra high pressure can effectively depress the boundary reaction,enhance the condensed density and modify the boundary bonding conditions.