Mechanical properties of the alumina-coated Al(18)B(4)O(33)w/6061Al composites

作者：Ding DY^*; Wang DZ; Zhang XX; Yao CK

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2001, 308(1-2): 19-24.

DOI：10.1016/S0921-5093(00)02041-4

• alumina coating
• aluminum matrix composite
• mechanical property

To control the interfacial reactions in squeeze-casting aluminum berate whisker reinforced 6061Al composites, sol-gel gamma- and alpha -Al2O3 coatings were deposited on the whisker surfaces for preparation of the alumina-coated composites. Tensile and bending tests of the coated and uncoated composites were carried out. Experimental results indicated that, although the room-temperature strength of the composite was not improved, the introduction of alumina coatings contributed to the enhancement of elastic modulus. To eliminate the strength-scattering effect and to evaluate the thermal-resistance of alumina coatings, an index of strength-decrease degree (Delta sigma (bd)) was useful. The alumina coatings were found to improve the composite';s high-temperature strength and change the fracture mechanisms of the composite at different testing temperatures.

• 出版日期2001-6-30
• 单位哈尔滨工业大学