碳化硅颗粒增强铝基复合材料的界面特征及力学性能

Interface Characteristics and Mechanical Properties of Silicon Carbide Particulate Reinforced Aluminum Composites

研究了氧化态和原始态碳化硅颗粒增强铝基复合材料的界面结构及其对复合材料弯曲强度的影啊。结果发现．氧化处理后碳化硅与基体铝界面上有一ＳｉＯ２非晶层，该非晶层内由于铝的扩散作用而形成铝的浓度梯度。原始态碳化硅与铝的界面上则无此非晶层．由于此非晶层的作用．导致界面结合强度的提高从而增加了复合材料的弯曲强度。

Interface characteristics of silicon carbide particulate of both oxidized and as received reinforced aluminum matrix composite materials and their effect on the flexural strength of the composites had been studied. It was found that there was an amorphous silicon dioxide layer at the interface between silicon carbide oxidized and the aluminum matrix. Because of the diffusion of aluminum there was a gradient of aluminum across the amorphous layer. No amorphous layer was found at the interface between silicon carbide particulate as received and the aluminum matrix.As The amorphous layer interacted with aluminum matrix, the interface bondage was strengthened and the flexural strength of the composite was raised.