کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474932 991105 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
WC-reinforced (Ti,W)(CN)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
WC-reinforced (Ti,W)(CN)
چکیده انگلیسی

A ceramic microstructure of WC-reinforced (Ti,W)(CN) was designed using thermodynamic instability among the constituent elements and gas species involved in the sintering process. During sintering WC in the shape of platelets formed in (Ti,W)(CN) solid-solution ceramics, which were synthesized from milled mixtures of oxides with carbon. The WC platelets separated from the (Ti,W)(CN) ceramics due to the low chemical affinity of tungsten for nitrogen. The shape of WC varies depending on the composition of the binder phase and the sintering conditions. With increasing binder content, the WC platelet shape became more irregular. This change was attributed not only to surface energy but also to the formation mechanism. The presence of WC platelets toughened (Ti,W)(CN) significantly at excellent hardness value (Hv: 18.5–20.0 GPa, KIC: 6.0–6.8 MPa m1/2) as compared to those of recently reported advanced structural ceramics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 30, Issue 3, February 2010, Pages 793–798
نویسندگان
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