Al_2O_3-SiO_2纤维增强ZL109合金复合材料的强度特性

The Mechanical Strength Characters of ZL109 Alloy Composites Reinforced by Al 2 O 3 -SiO 2 Fiber

用低成本的Ａｌ２Ｏ３－ＳｉＯ２系纤维作为增强相，通过加压铸造法制作ＺＬ１０９合金复合材料，并对该复合材料（Ｖｆ２０％）和ＺＬ１０９合金进行不同温度下的时效处理和压缩试验．通过ＤＳＣ和ＴＥＭ分析认为：复合材料中的基体具有和ＺＬ１０９合金一样的时效硬化特性，所以纤维对ＺＬ１０９合金的增强效果明显．在高温下或在高温下长期保温后的基体材料中时效硬化作用消失，所以纤维的增强作用更为显著．

Using low cost Al 2 O 3 -SiO 2 fiber as reinforced phase, ZL109 alloy composites were made by squeeze casting. The composites and ZL109 alloy were accelerated ageing at different temperatures, and then examined by compression test. From DSC, TEM′s analysis, the following conclusion can be deduced: the age-hardening characteristic of the composites matrix and ZL109 alloy is identical, so the strengthening effect of fibre in ZL109 alloy is obvious. The age-strengthening effect of materials under high temperature or annealed for a long time decreased or disappeared, so the strengthening effect of fibre is more prominent.