Microstructural and mechanical properties of Al–SiO2 nanocomposite foams produced by an ultrasonic technique

Autor:	Akram Salehi, S. Mojtaba Zebarjad, Abolfazl Babakhani
Rok vydání:	2015
Předmět:	Nanocomposite Materials science Scanning electron microscope Mechanical Engineering Foaming agent Condensed Matter Physics Microstructure law.invention Stress (mechanics) Optical microscope Mechanics of Materials law Relative density General Materials Science Ultrasonic sensor Composite material
Zdroj:	Materials Science and Engineering: A. 638:54-59
ISSN:	0921-5093
DOI:	10.1016/j.msea.2015.04.024
Popis:	In this study, nanocomposite foams reinforced with different weight percentages of silicon dioxide nanoparticles (0.25, 0.5, 0.75 and 1.0 wt%) were fabricated using the ultrasonic and stir casting techniques. For this purpose heat treated TiH2 was used as foaming agent. Microstructural studies were done by optical microscope and scanning electron microscope. Hardness evaluation of precursor nanocomposites showed that the hardness was significantly increased by the addition of SiO2 nanoparticles and Al–0.75 wt% SiO2 nanocomposite makes the highest hardness. Evaluation of compressive behavior of Al–SiO2 nanocomposite foams showed that the plateau stress increases more than 3 times as the foam relative density increases from 0.09 to 0.16. Energy absorption of Al–SiO2 nanocomposite foams has been found to be dependent on both relative density and structural properties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d87783affdc4b5b0fa28ae46389e054 https://doi.org/10.1016/j.msea.2015.04.024 Zobrazit plný text záznamu Full Text from ScienceDirect