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凝膠輔助發(fā)泡法制備三維互聯(lián)多孔SiC陶瓷
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1.沈陽(yáng)理工大學(xué) 材料科學(xué)與工程學(xué)院;2.東北大學(xué) 材料各向異性與織構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室

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國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51772048),沈陽(yáng)理工大學(xué)引進(jìn)高層次人才科研支持計(jì)劃(項(xiàng)目號(hào)105000100032)


Fabrication of 3D interconnected porous SiC by gel-assisted foaming method
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Affiliation:

1.School of Materials Science and Engineering,Shenyang Ligong University;2.Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University

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    摘要:

    本文通過(guò)結(jié)合機(jī)械攪拌發(fā)泡法和冷凍-凝膠法制備了三維互聯(lián)多孔SiC陶瓷材料,所獲得的多孔陶瓷材料孔徑分布均勻、孔結(jié)構(gòu)可調(diào)并具有雙級(jí)孔結(jié)構(gòu)。研究了PVA含量與攪拌速度對(duì)多孔陶瓷孔結(jié)構(gòu)及性能的影響。結(jié)果表明,隨著PVA含量的增加,孔結(jié)構(gòu)均勻程度和聯(lián)通性提高、一級(jí)孔孔徑尺寸逐漸減小且孔壁變薄。當(dāng)ω(PVA)/ω(SiC)為1.5時(shí),樣品孔徑分布最均勻；并且隨著攪拌速度的增大,孔隙率增加、聯(lián)通性增強(qiáng)、一級(jí)孔孔徑尺寸減小,當(dāng)轉(zhuǎn)速為1600 r/min時(shí),SiC多孔陶瓷的孔隙率和抗壓強(qiáng)度分別為：88.42 %和4.36 MPa。

    Abstract:

    In this work, three dimensional interconnected porous SiC ceramics were prepared via combining stirring-foaming and freeze-gelcasting. The obtained porous ceramics with tunable porous structure, uniform pore size distribution and multiply porous structure were fabricated successfully. The effect of PVA and stirring speed on porous structure and properties of SiC porous ceramics were investigated.The results showed that porous structure uniformity could be tuned by varying ω(PVA)/ω(SiC) , and until optimum when the values was 1.5. The porosity increased, 1st mode pore size and pore wall thickness decreased with the increasing of PVA content. The porous structure could be improved by increasing stirring speed. When stirring speed was 1600 r/min, the porosity and compressive strength were 88.42 % and 4.36 MPa, respectively.

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趙菁,徐瀚川,茹紅強(qiáng),袁志剛.凝膠輔助發(fā)泡法制備三維互聯(lián)多孔SiC陶瓷[J].稀有金屬材料與工程,2020,49(2):618~622.[Zhao Jing, Xu Hanchuan, Ru Hongqiang, Yuan Zhigang. Fabrication of 3D interconnected porous SiC by gel-assisted foaming method[J]. Rare Metal Materials and Engineering,2020,49(2):618~622.]
DOI：10.12442/j. issn.1002-185X. QH20190044

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  • 收稿日期:2019-03-28
  • 最后修改日期:2019-05-08
  • 錄用日期:2019-10-23
  • 在線發(fā)布日期: 2020-03-12
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