کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7212317 | 1469348 | 2018 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low-temperature fabrication of SiC/geopolymer cellular composites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Hierarchically porous SiC-geopolymer foams were synthesized by using geopolymerization, which is a low temperature method (75 °C) that allows to replace the high temperature treatment process. The porosity was developed by a novel saponification/peroxide combined route, with H2O2 and olive oil used as foaming agents. The in-situ formation of the water-soluble soap and glycerol molecules generated by the saponification reaction and the decomposition of hydrogen peroxide enabled to obtain a large volume of interconnected macro-porosity. The reaction bonding behavior, phase composition, porosity characteristics, microstructure and mechanical strength of porous SiC-geopolymer ceramics were investigated. The combination of peroxide and oil enabled the production of open celled SiC-geopolymer composite foams in a rather large range of total porosity and strength values, with an optimal sample possessing a total porosity of up to â¼84 vol%, an open porosity of â¼83 vol%, a thermal conductivity of 0.15 W/mK, and a compression strength of â¼1.1 MPa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 137, 15 March 2018, Pages 23-30
Journal: Composites Part B: Engineering - Volume 137, 15 March 2018, Pages 23-30
نویسندگان
Chengying Bai, Jian Zheng, Gian Andrea Rizzi, Paolo Colombo,