Microstructure and Mechanical Properties of CNT-Reinforced AZ91D Composites Fabricated by Ultrasonic Processing

• Published in: Acta metallurgica sinica : English letters Vol. 29; no. 7; pp. 652 - 660
• Main Authors: Zhao, Fu-Ze, Feng, Xiao-Hui, Yang, Yuan-Sheng
• Format: Journal Article
• Language: English
• Published: Beijing The Chinese Society for Metals 01.07.2016; Springer Nature B.V
• Subjects: AZ91D镁合金; Carbon nanotubes; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composite materials; Corrosion and Coatings; Ductility; Ethanol; Grain boundaries; Grain refinement; Grain size; Magnesium alloys; Magnesium base alloys; Materials Science; Mechanical properties; Metallic Materials; Microstructure; Nanotechnology; Organic chemistry; Organometallic Chemistry; Powder metallurgy; Reaction products; Spectroscopy/Spectrometry; Temperature; Tensile strength; Tribology; Ultimate tensile strength; Ultrasonic processing; 制备; 力学性能; 复合材料; 微观组织; 扫描电镜观察; 碳纳米管; 超声处理; China; Magnesium matrix composites; Carbon nanotubes (CNTs); Mechanical properties; Microstructure; Ultrasonic vibration
• ISSN: 1006-7191; 2194-1289
• DOI: 10.1007/s40195-016-0438-6

Carbon nanotube （CNT）-reinforced AZ91D alloy composite was fabricated by ultrasonic processing. The microstructure and mechanical properties of the CNTs/AZ91D composites were investigated. Obvious grain refinement was achieved with the addition of 0.5 wt% CNTs. The SEM observation indicated that CNTs were distributed near the grain boundary or around the inter-grain β-Mg17A112 phase. No evident reaction product was found at the interface between CNTs and AZ91D matrix. Compared to the monolithic AZ91D alloy, the yield strength, ultimate tensile strength, and elongation of the 0.5 wt% CNTs/AZ91D composite were improved significantly. However, the poor interface bonding between CNTs and AZ91D matrix restricted further improvement in mechanical properties.