کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155386 | 1666349 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
3D printing of complex shaped alumina parts
ترجمه فارسی عنوان
چاپ سه بعدی از قطعات آلومینیای پیچیده شکل
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کلمات کلیدی
چاپ سه بعدی، آلومینا، رئوئولوژی، ضخامت ویژگی های مکانیکی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Alpha-alumina powder was mixed with methyl cellulose as a binder with concentration as low as 0.25% by weight in an aquoes medium and kneaded in a high shear mixer to obtain a printable paste. The paste was subjected to rheological measurements and exhibited a shear rate exponent of 0.54 signifying the shear thinning behavior. The paste was used for printing parts with various shapes according to CAD model by employing a ram type 3D printer. Printed parts were dried and the green density was determined. Further, the parts were also subjected to X-ray radiography in order to evaluate the possible occurrence of printing defects. The samples were sintered under pressureless condition at 1650â¯Â°C in a muffle furnace and Hot Isostsically Pressed (HIP) at 1350â¯Â°C and a pressure of 1650â¯bar using a vacuum encapsulated SS CAN. Hot Isostatic pressing resulted in a higher density of 3.94â¯g/cc in comparison to 3.88â¯g/cc obtained under pressureless conditions and also shown superior mechanical properties. HIPing of 3D printed samples not only resulted in possible healing of printing defects as reavealed by X-ray radiography but also enhanced the diffusion at low temperature of 1350â¯Â°C leading to finer grain sizes as complemented by the microstructure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 16, November 2018, Pages 19278-19281
Journal: Ceramics International - Volume 44, Issue 16, November 2018, Pages 19278-19281
نویسندگان
Sirisala Mamatha, Papiya Biswas, Pandu Ramavath, Dibakar Das, Roy Johnson,