ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Two Al-Si alloys (Al-12Si and Al-20Si) and an industrial pure Al were reinforced with70vol.% dual-sized SiC particles. The composites experienced annealing treatment, to investigate theeffect of silicon addition and thermal history on the thermal expansion behavior of high SiC contentaluminum matrix composites. The results showed that silicon additions led to a beneficial reductionin the coefficients of thermal expansion (CTEs) of the composites. In the temperature range between20℃ and 400℃, a continuous increase in CTEs with temperature was observed for SiCp/pure Alcomposite. However, the CTEs of SiCp/Al-12Si and SiCp/Al-20Si showed the maxima at 350℃and250℃ respectively, then diminished at higher temperatures. This was related to the change of solidsolubility of silicon in aluminum at elevated temperatures. The thermal expansion behavior ofSiCp/Al composites was also influenced by thermal history. After annealing treatment, the CTEswere reduced when compared with those of as-cast composites. Annealing treatment reduced theoriginal thermal residual stresses, and then altered thermal expansion behavior of the composites
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.649.pdf
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