کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1491597 | 992355 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Deposition of nickel nanoparticles onto aluminum powders using a modified polyol process Deposition of nickel nanoparticles onto aluminum powders using a modified polyol process](/preview/png/1491597.png)
Aluminum is commonly used as fuel additive for propellants. The main limitation to its use lies in comparatively slow ignition and oxidation/combustion kinetics. Combustion performance of aluminized propellants can be improved through the use of Ni-coated Al particles. Nanoparticles, with its increased reactivity, also improve combustion performance. Hence, in this work, nano-sized Ni particles coated onto commercially available micron-sized Al powders using a modified polyol process were synthesized and evaluated. Ni-coated Al powders of various compositions produced by this method showed significant improvement in the oxidation kinetics as compared to untreated Al powders. The onset oxidation temperatures for the Ni-coated Al powders were found to be significantly reduced as compared to pure untreated Al. Other than the oxides, the intermetallic compound, Al3Ni was also detected in the 10 wt% Ni–Al powders that were heated to temperature above 1050 °C.
Journal: Materials Research Bulletin - Volume 44, Issue 1, 8 January 2009, Pages 95–99