کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
823084 906822 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal expansion studies on aluminium-matrix composites with different reinforcement architecture of SiC particles
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Thermal expansion studies on aluminium-matrix composites with different reinforcement architecture of SiC particles
چکیده انگلیسی

The thermal expansion behaviour of different SiC particulate reinforced aluminium-matrix composites is investigated up to 500 °C using a thermal mechanical analysis equipment. The aim is to explain abnormalities in the thermal expansion behaviour of 70 vol% SiC particulate reinforced aluminium-matrix composites (Al/SiC) used as base plate material for high power electronic modules. Composites with different SiC contents (10, 20, 55, 70 vol%), various matrix-alloy compositions (Al99.5, A356, A359), and different fabrication routes are investigated. The instantaneous coefficient of linear thermal expansion (CTE) as a function of temperature is compared with predictions from thermo-elastic models according to Schapery and Turner using the expansion data determined for the ingredients.The expansion behaviour is correlated to the microstructure, the deformation of the matrix, and the internal stress conditions. The temperature dependence of the solubility of Si in Al influences the CTE of Al–Si matrix alloys significantly. Composites with isolated ceramic particles (10–55 vol%) show similar thermal behaviour as the matrix alloy just reduced by the volume fraction of SiC-particles. The CTE of highly reinforced Al/SiC(>55 vol% SiC), where the reinforcement is interconnected, drops above 250 °C. Such anomalies in the CTE are explained qualitatively by visco-plastic matrix deformations and changing void volume fractions. Although the matrix deforms non-elastic, the effects are reversible during reproduced thermal cycling.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 66, Issue 13, October 2006, Pages 2206–2217
نویسندگان
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