کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582148 1514870 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature distribution and neck formation of WC–Co combined particles during spark plasma sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Temperature distribution and neck formation of WC–Co combined particles during spark plasma sintering
چکیده انگلیسی

Based on the experimental investigations, a model that describes the distributions of the current intensity and the temperature increase among the different raw powder particles, as well as its evolution during the spark plasma sintering (SPS) process, has been developed. As calculated by the model, in a WC–Co combined (Co-film coated WC) particle, a majority fraction of the WC particle is heated by the thermal energy transferred from the Co film. The rapid melting and joint of the Co films lead to the fast formation of the sintering necks of the combined particles. The temperature of the combined particles may reach the eutectic temperature of WC and Co and the melting temperature of Co at relatively lower sintering temperatures, thus the powder particles can be densified rapidly at the temperatures apparently lower than those in the conventional sintering techniques. The physical essence of the neck formation and the unique densification feature of the SPS process is presented by combing theoretical analysis and experimental studies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 488, Issues 1–2, 15 August 2008, Pages 1–7
نویسندگان
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