EFFECTS OF SINTERING TEMPERATURE OF WHISKER PREFORM ON THE DAMPING PROPERTIES OF BI(OH)3-COATED AL18B4O33 WHISKER-REINFORCED ALUMINUM COMPOSITES
LIU Gangsup1,2, TANG Shaweisup1, HU Jinsup1()
1 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 2 College of Applied Science, Harbin University of Science and Technology, Harbin 150080
Cite this article:
LIU Gang, TANG Shawei, HU Jin. EFFECTS OF SINTERING TEMPERATURE OF WHISKER PREFORM ON THE DAMPING PROPERTIES OF BI(OH)3-COATED AL18B4O33 WHISKER-REINFORCED ALUMINUM COMPOSITES. Acta Metall Sin, 2014, 50(3): 361-366.
In order to alter the overall properties of composites, the reinforcement coatings are commonly implemented to improve wetting behavior and prevent interfacial reaction. Unfortunately, few researches were emphasized on the effects of the sintering temperature of whisker preform (STWP) on the damping behavior of composites, especially whisker with coatings. In the present investigation, Al18B4O33 whisker was coated with Bi(OH)3 by a chemical method. The whisker preform was sintered at the different temperature. The coated whisker-reinforced aluminum matrix composites were fabricated through squeeze casting technique. The damping properties of the coated composites with the different STWP were presented and discussed. The results indicated that the microstructures of coatings on the whisker surfaces and at the interface in the coated composites are strongly dependent on STWP. There are two damping peaks in the coated composites (related to dislocation damping and interface damping), when STWP is 530 and 830 ℃, respectively. Only one interface damping peak occur in the coated composite when STWP is 1000 ℃. When STWP is 830 ℃, the highest damping capacity is obtained in the coated composite, which relate to a special interfacial structure.
