束丝SiC纤维增强铝复合材料界面TEM研究

TEM study on the microstructure of continuous SiC fiber reinforced aluminum composites

利用透射电镜 (TEM )对由几种不同方法制备的束丝SiC纤维增强铝复合材料 (包括超声液相浸渗法制备的复合丝、由复合丝热压得到的板材以及由真空液相压渗法制备的板材等 )的界面微观特征进行了研究 ,结果显示 ,制造态及 5 5 0℃× 1h热暴露条件下复合材料没有发生界面反应 ,在 6 5 0℃× 1h热暴露条件下有厚度 10 0～2 0 0nm的界面反应区。该研究表明 。

The interfacial microstructures of several kinds of continuous SiC fiber reinforced aluminum composites fabricated by different method including composite wires prepared by ultrasonic liquid infiltration method, composite plates made by hot press process and by vacuum liquid infiltration method have been investigated by means of transmission electron microscope (TEM). The results show that there aren't obvious interface reaction products for samples of as received and thermal exposed at 550°C × 1h. However, a reaction zone with a thickness about 100∼200nm observed while the samples exposed at 650°C × 1h. This study indicates that the SiC/Al composites possess a good interfacial chemical stability for the adopted fabricating process.