کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10655613 | 1005178 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of reactive Al/Ni structures by ball milling
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis of reactive Al/Ni structures by ball milling Synthesis of reactive Al/Ni structures by ball milling](/preview/png/10655613.png)
چکیده انگلیسی
Material systems that exhibit self-propagating exothermic reactions (SPER) can be potentially used for nano/microscale heater purposes in thermal nanomanufacturing applications. We propose that ball milling (BM) is a simple and cost effective technique that can be used to produce such materials. For this purpose, an interrupted BM run of aluminum/nickel powders with a molar ratio of 1:3 was performed, followed by the cold pressing of the powders into pellets that were ignited using an external heat source. Samples that exhibit SPER were characterized before and after ignition using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) with a Back Scattered Electron Detector (BSE), Energy Dispersive X-Ray analysis (EDX) and Differential Thermal Analysis (DTA). The results show that after 7Â h of BM an aluminum/nickel lamellar structure forms at the particle boundaries. The characteristic lamella dimension reduces with increasing milling time down to â¼200Â nm after 10Â h of BM. The ignition conditions for compacts of milled powders indicate that samples with a higher volume fraction of the lamellae possess the shortest ignition time at 4.25Â s.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 18, Issue 11, November 2010, Pages 2219-2223
Journal: Intermetallics - Volume 18, Issue 11, November 2010, Pages 2219-2223
نویسندگان
Anastasia Hadjiafxenti, Ibrahim Emre Gunduz, Chrysostomos Tsotsos, Theodora Kyratsi, Charalabos C. Doumanidis, Claus Rebholz,