کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1626873 1516452 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of W–Cu nanopowders by a homogeneous precipitation process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Preparation and characterization of W–Cu nanopowders by a homogeneous precipitation process
چکیده انگلیسی

A novel homogeneous precipitation process was employed to prepare nanosized W–Cu powders. Precipitates of CuWO4·2H2O and Cu2(OH)2WO4 were first obtained by adding sodium tungstate and copper chloride into aqueous ammonia solution, and then heating the solution to remove ammonia. The precipitates were subsequently washed, dried and dehydrated, followed by reducing in H2 atmosphere to convert into W–Cu composite powders. Properties of the precipitates, as well as the W–Cu composite powders and their sintered parts were characterized. It was shown that W–Cu powders produced by the homogeneous precipitation process have a nearly spherical shape, with particle size ranging from 50 to 100 nm and a well-mixed state of W and Cu ingredients. Relative density of more than 94% and 98% was obtained for W–Cu samples sintered at 1050 and 1150 °C, respectively. Homogeneous microstructure, good physical and mechanical properties were also achieved for the sintered W–Cu parts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 421, Issues 1–2, 14 September 2006, Pages 146–150
نویسندگان
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