کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1612988 | 1516308 | 2014 | 6 صفحه PDF | دانلود رایگان |
• Among the highest hardness has been measured for Al-MWCNT composites.
• Up to 9 wt% CNT could be dispersed by high energy milling.
• TEM observations show that CNTs sustained the milling process.
• Hall-Petch strengthening explains partly the mechanical properties.
• A load transfer mechanism between the Al-matrix and the CNT is evidenced.
The macro hardness (HV20) was measured for aluminium and 1–9 wt% Multi Wall Carbon Nanotubes (MW-CNTs) composites that were milled and hot compressed. The hardness increased with increasing fraction of MW-CNTs up to 6 wt% (HV20 = 151) and then remained constant. The content of MW-CNTs was significantly higher than reported for similar materials and measurements. The composites were analysed by Raman, TEM and XRD. The Raman and TEM showed MW-CNTs were still present after milling and hot pressing. The XRD was used to determine the Al crystallite size which was used to determine Hall–Petch contribution to the composite hardness.
Journal: Journal of Alloys and Compounds - Volume 585, 5 February 2014, Pages 362–367