کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5440315 | 1398227 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Near-net shape manufacture of B4C-Co and ZrC-Co composites by slip casting and pressureless sintering
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Fabrication of near-net shaped B4C-Co and ZrC-Co composites by slip casting and pressureless sintering is described. It is shown how B4C-Co and ZrC-Co concentrated suspensions can be prepared by aqueous colloidal processing, and optimized (in terms of pH, deflocculant contents, and sonication time) to have a shear-thinning rheological behaviour suitable for the near-net shaping of the corresponding cermet compacts by slip casting. It is also demonstrated that the robust, highly-dense compacts so obtained have a uniform green microstructure without macro-defects or gradient density, and which can be fully densified by pressureless sintering. Specifically, it is shown that B4C-Co compacts densify by reactive and transient liquid-phase sintering, thus resulting in multi-component ceramics. ZrC-Co compacts densify however by persistent liquid-phase sintering, thus resulting in cermets. An explanation is given for these observations, and general implications are discussed for the near-net shape manufacture of these and similar carbide-metal composites for use in engineering applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 15, December 2017, Pages 4577-4584
Journal: Journal of the European Ceramic Society - Volume 37, Issue 15, December 2017, Pages 4577-4584
نویسندگان
Angel L. Ortiz, Victor M. Candelario, Rodrigo Moreno, Fernando Guiberteau,