کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1603534 1515985 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal explosion synthesis of ZrC particles and their mechanism of formation from Al–Zr–C elemental powders
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Thermal explosion synthesis of ZrC particles and their mechanism of formation from Al–Zr–C elemental powders
چکیده انگلیسی

ZrC particles were fabricated by thermal explosion (TE) from mixture of Al, Zr and C elemental powders. Without the addition of Al, the synthesized ZrC particles had irregular shape of ~ 4.0 μm in average. Increasing Al content up to 30 wt.%, however, refined significantly them down to < 0.2 μm with regularly square morphology. The Al effect of reaction mechanism promoted the ZrC formation as diluents in the course of TE, which was clarified using differential thermal analysis and X-ray diffraction technique. The melting of Al favored the reaction with Zr to generate ZrAl3, and then the dissolution of C into the Al–Zr liquid resulted in precipitation of ZrC. Meanwhile, the exothermic effect prompted C atoms dissolving into Zr–Al liquid and eventually led to precipitation of ZrC out of the supersaturated liquid. The Al addition inhibited particle growth, but also promoted the TE reaction.


► ZrC particles were prepared by TE from Al–Zr–C system.
► The formation mechanism of ZrC particles was discussed.
► The synthesized ZrC particles were determined to be ultra-fine or nano-scale with Al addition.
► Al not only prevents the synthesized products from growing but also promotes the TE reaction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 35, November 2012, Pages 251–256
نویسندگان
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