High temperature DSC study on interfacial reaction of aluminum borate whisker reinforced aluminum alloys

来源期刊：中国有色金属学报(英文版)1999年第4期

论文作者：毕刚 王浩伟 吴人洁 张荻 施忠良

文章页码：785 - 790

Key words：composites; aluminum borate whisker; interfacial reaction

Abstract: Aluminum borate (9Al₂O₃2B₂O₃ ) whisker reinforced ZL109 alloy and pure Al were fabricated by squeeze casting technique. By means of high temperature DSC, the inter facial reaction of these composites was studied in detail, and reaction products were analyzed by using XRD and SEM. It was shown that in the 9Al₂O₃2B₂O₃,w/Al composites, the pure Al can react with the 9Al₂O₃2B₂O₃ whisker and the critical temperature is 756 ℃. In the composites, the chemical reaction occurs at the interface and the product is identified to be spinel MgAl2O4. The magnesium is one of main factors that cause the interfacial reaction, oxygen promotes the interfacial reaction, but Cu, Ni elements in ZL109 alloy don't take part in the interfacial reaction. The temperature is another main factors that cause interfacial reaction. When the temperature is higher than 690℃, both Mg and Al elements can react with the whisker. When the temperature ranges from 449℃ to 690 ℃, only Mg element reacts with the whisker. T6 heat treatment causes more serious interfacial reaction.