کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5440860 | 1398239 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Complex ceramic architectures by directed assembly of 'responsive' particles
ترجمه فارسی عنوان
معماری سرامیک مجتمع توسط مونتاژ مستقیم ذرات "پاسخگو"
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کلمات کلیدی
مأمور رهبری، کاربردکردن سطح، پلیمرهای پاسخ دهنده، سرامیک متخلخل متخلخل، امولسیون قالب،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Surface functionalization of alumina powders with a responsive surfactant (BCS) leads to particles that react to a chemical switch. These 'responsive' building blocks are capable of assembling into macroscopic and complex ceramic structures. The aggregation follows a bottom up approach and can be easily controlled. The directed assembly of concentrated suspensions leads to highly dense (â¼99%) ceramic components with average 4-point bending strength of â¼200 MPa. On the other hand, the emulsification of suspensions with concentrations from 7 to 43 vol% and 50 vol% decane results in emulsions with different properties (stability, droplet size and distribution). The oil droplets provide a soft template confining the alumina particles in the continuous phase and at the oil/water interfaces. Aggregation of these emulsions followed by drying and sintering leads to macroporous (pore sizes ranging from 30 to 4 μm) alumina structures with complex shapes and a wide range of microstructures, from closed cell structures to highly interconnected foams with total porosities up to 83%. Alumina scaffolds with â¼55% porosity can reach crushing strength values above 300 MPa in compression and â¼50 MPa in 4-point bending.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 1, January 2017, Pages 199-211
Journal: Journal of the European Ceramic Society - Volume 37, Issue 1, January 2017, Pages 199-211
نویسندگان
Esther GarcÃa-Tuñón, Gil C. Machado, Marc Schneider, Suelen Barg, Robert V. Bell, Eduardo Saiz,