کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
822579 906797 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Mg and Si in the aluminum on the thermo-mechanical properties of pressureless infiltrated SiCp/Al composites
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of Mg and Si in the aluminum on the thermo-mechanical properties of pressureless infiltrated SiCp/Al composites
چکیده انگلیسی

The effect of adding Mg and Si to aluminum on the thermo-mechanical properties of pressureless infiltrated SiCp/Al composites was investigated. The results showed that, when the Si content was lower than 6 wt% or the Mg content was lower than 4 wt%, the composites showed poor thermo-physical properties because of higher porosity in the composites resulting from the poor wettability between Al and Si. Increasing the Si content to the aluminum can enhance the elastic modulus, thermal dimensional stability and thermal conductivity of the composites and reduce the coefficient of thermal expansion (CTE) of the composites. However, excessive Si beyond 12 wt% can reduce the thermal conductivity and bending strength of the composites. An optimum content of Mg addition to aluminum was found to be 4–8 wt%, at which the composites exhibited good thermo-mechanical properties. However, as the Mg content was increased beyond 8 wt%, the higher porosity in the composites resulting from the lower pressure of the magnesium led to lower thermo-mechanical properties. The microstructure of such composites was also studied by SEM and TEM to better understand how the addition of Si and Mg affects their properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 67, Issue 10, August 2007, Pages 2103–2113
نویسندگان
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