کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1463541 989648 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formulation and preparation of low-concentrated yttria colloidal dispersions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Formulation and preparation of low-concentrated yttria colloidal dispersions
چکیده انگلیسی

High-temperature creep resistant steels for nuclear applications consist of a steel matrix reinforced with a dispersion of nano-sized refractory ceramic oxide particles, e.g. yttria (Y2O3). In this study, the formulation and preparation of low-loaded (2, 3 and 4 vol.%) Y2O3 colloidal dispersions for its possible application as suspension precursor in the production of high-temperature creep resistant steels is discussed. The final end product is formulated as a low-concentrated and low-viscous colloidal suspension consisting of non-agglomerated Y2O3 nano-particles in the (sub)-100 nm range.The spherical as-received and submicron agglomerated powder necessitates ball-mill processing in order to reduce the as-received size distribution down to nano-level. A comparative study on the desagglomeration of Y2O3 nano-powder using conventional planetary ball-milling or nano-milling technology has been done. Formulation of stable colloidal suspensions by screening suitable dispersants has led to the selection of one specific dispersant for this application, Calgon N. Suspension characterization by the determination of particle size distribution (PSD), ζ-potential measurements, colloidal suspension visualization using transmission electron microscopy (TEM), rheology and suspension life-time is discussed in this paper.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 38, Issue 4, May 2012, Pages 2701–2709
نویسندگان
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