کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1582202 | 1514870 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication and characterization of W-15Cu composite powders by a novel mechano-chemical process
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fabrication and characterization of W-15Cu composite powders by a novel mechano-chemical process Fabrication and characterization of W-15Cu composite powders by a novel mechano-chemical process](/preview/png/1582202.png)
چکیده انگلیسی
W-Cu nanopowder was successfully prepared by a novel mechano-chemical method, in which WO3 and CuO powders were first jet-milled in a high-pressure airflow, then reduced in H2 to convert into W-Cu composite powders. The starting and milled WO3 and CuO powders, as well as the resulting W-Cu powders were characterized by X-ray diffraction analysis (XRD), transmission electron microscope (TEM) and laser particle size analysis. Property of the sintered W-Cu compacts was also investigated. It was shown that jet milling effectively reduces particle size of the starting WO3 and CuO powders. The W-Cu composite powder fabricated by the mechano-chemical process has nanosize of less than 100 nm and high-dispersed and homogeneous distribution of W and Cu components. The W-Cu composite powder exhibits high sinterability, and relative density of near 99% of the theoretical was achieved for W-Cu compacts sintered at 1200 °C. Furthermore, the sintered W-Cu parts showed good physical and mechanical properties. Maximum electrical and thermal conductivity are 185 W mâ1 Kâ1 and 25 m Ωâ1 cmâ1 for W-Cu compacts sintered at 1200 °C, respectively, and bending strength and Vickers hardness are 673 and 372 MPa, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 488, Issues 1â2, 15 August 2008, Pages 453-457
Journal: Materials Science and Engineering: A - Volume 488, Issues 1â2, 15 August 2008, Pages 453-457
نویسندگان
Jigui Cheng, Peng Song, Yanfei gong, Yanbo Cai, Yonghong Xia,