The properties and microstructure of hybrid composites reinforced with WO3 particles and Al18B4O33 whiskers by squeeze casting

✍ Scribed by Y.C. Feng; L. Geng; G.H. Fan; A.B. Li; Z.Z. Zheng

• Publisher: Elsevier Science
• Year: 2009
• Weight: 300 KB
• Volume: 30
• Category: Article
• ISSN: 0261-3069
• DOI: 10.1016/j.matdes.2009.02.020

✦ Synopsis

Pure aluminum matrix hybrid composites reinforced with WO 3 particles and Al 18 B 4 O 33 whiskers were fabricated by a squeeze casting technique. Effects of the particle/whisker ratio on properties of the composites were investigated, and the mass attenuation coefficient (l/q) and half value layer (HVL) to linear attenuation coefficient were examined. The results show that WO 3 particles and Al 18 B 4 O 33 whiskers have great effects on the microstructure and properties of the hybrid composites. WO 3 particles and Al 18 B 4 O 33 whiskers are distributed uniformly and randomly in the Al matrix. The ultimate tensile strength and elongation of composites increase with decrease of the particle/whisker ratio. Compare with 2024Al alloy and pure aluminum, the absorptivity g and the l/q of the hybrid composite increase by 65% and 32.1%, respectively.