硅酸铝短纤维增强铝硅合金复合材料的强度特性与界面结构  

Mechanical Strength Characters and Interface Structure of Aluminosilicate Short Fibre Reinforced Al Si Alloy Composite

作　　者：操光辉[1,2] 李军[1,2] 沈光骏[1,2] 吴申庆[1,2] 舒光冀[1,2] 

机构地区：[1]东南大学材料科学与工程系 [2]东南大学分析测试中心

出　　处：《东南大学学报（自然科学版）》1998年第2期105-108,共4页Journal of Southeast University：Natural Science Edition

摘　　要：用挤压铸造法制备硅酸铝短纤维（Ａｌ２Ｏ３·ＳｉＯ２）增强铝硅（ＡｌＳｉ）合金复合材料，测试了复合材料的室温及高温强度，并利用透射电镜观察了Ａｌ２Ｏ３·ＳｉＯ２纤维与ＡｌＳｉ合金基体界面．结果表明：３％～１０％的硅酸铝短纤维的加入使复合材料的室温及高温强度大大提高，在硅酸铝纤维与基体界面上存在两种反应物：一种物质是ＭｇＡｌ２Ｏ４，另一种物质含有Ｓｉ和Ｐ，且二者原子之比为３∶４，呈正交结构，点阵常数为ａ＝０．７１４ｎｍ，ｂ＝１．４２８ｎｍ，ｃ＝２．４０９ｎｍ．Aluminosilicate(Al 2O 3·SiO 2) short fibre reinforced Al Si alloy composite was fabricated by means of squeeze casting, the ultimate tensile strength of composites at room temperature and high temperature was tested and the interface between aluminosilicate fibre and Al Si alloy matrix was also studied by TEM. The experimental results show that the tensile strength of composites is considerably improved with 3%～10% volume fraction addition of aluminosilicate short fibres at room and high temperature, one reaction products at fibre/matrix interface is MgAl 2O 4 and the other is orthorhombic type, with lattice constants a =0 714 nm, b =1 428 nm, and c =2 409 nm.

关 键 词：短纤维 强度 界面结构 铝基复合材料 硅酸铝 

分 类 号：TB333.01[一般工业技术—材料科学与工程]