Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing monocrystalline silicon carbide nanofiber/silicon carbide ceramic-based composite material through nano-impregnation transient eutectic
The invention discloses a method for preparing a monocrystal silicon carbide nanofiber/silicon carbide ceramic-based composite material through nano impregnation transient eutectic. The preparation method comprises the following steps: firstly, depositing an interface layer on the fiber surface by using single crystal silicon carbide nanofiber as a raw material and utilizing a chemical vapor deposition method; dispersing the nanofiber containing the interface layer to make pulp, and preparing SiC nanofiber paper with a three-dimensional network structure through a pulping and papermaking process; putting the fiber paper into nano slurry containing a sintering aid, silicon carbide powder and a dispersing agent for vacuum impregnation; after vacuum impregnation is completed, the SiC prepreg tape/sheet is taken out and dried, and then the dried prepreg tape/sheet is subjected to laminated compression molding in a mold; and putting the molded prefabricated body into a graphite mold, and performing hot pressed sintering to finish preparation. Compared with the traditional silicon carbide ceramic, the silicon carbide ceramic disclosed by the invention has higher fracture toughness and strength, and has important significance for exploring a novel SiCf/SiC composite material.
本发明公开了一种纳米浸渍瞬态共晶制备单晶碳化硅纳米纤维/碳化硅陶瓷基复合材料的方法。首先采用单晶碳化硅纳米纤维为原料，利用化学气相沉积法在纤维表面沉积界面层；将含界面层的纳米纤维分散造浆，经抄浆造纸工艺制备三维网络结构的SiC纳米纤维纸；将上述纤维纸放入含烧结助剂、碳化硅粉体、分散剂的纳米浆料中真空浸渍；待真空浸渍完全后，将SiC预浸带/片取出干燥，然后将干燥后的预浸带/片在模具中进行叠层模压成型；将成型后的预制体放入石墨模具中热压烧结完成制备。本发明与传统的碳化硅陶瓷相比，具有更高的断裂韧性和强度，对于探索新型SiCf/SiC复合材料具有重要意义。
Method for preparing monocrystalline silicon carbide nanofiber/silicon carbide ceramic-based composite material through nano-impregnation transient eutectic
The invention discloses a method for preparing a monocrystal silicon carbide nanofiber/silicon carbide ceramic-based composite material through nano impregnation transient eutectic. The preparation method comprises the following steps: firstly, depositing an interface layer on the fiber surface by using single crystal silicon carbide nanofiber as a raw material and utilizing a chemical vapor deposition method; dispersing the nanofiber containing the interface layer to make pulp, and preparing SiC nanofiber paper with a three-dimensional network structure through a pulping and papermaking process; putting the fiber paper into nano slurry containing a sintering aid, silicon carbide powder and a dispersing agent for vacuum impregnation; after vacuum impregnation is completed, the SiC prepreg tape/sheet is taken out and dried, and then the dried prepreg tape/sheet is subjected to laminated compression molding in a mold; and putting the molded prefabricated body into a graphite mold, and performing hot pressed sintering to finish preparation. Compared with the traditional silicon carbide ceramic, the silicon carbide ceramic disclosed by the invention has higher fracture toughness and strength, and has important significance for exploring a novel SiCf/SiC composite material.
本发明公开了一种纳米浸渍瞬态共晶制备单晶碳化硅纳米纤维/碳化硅陶瓷基复合材料的方法。首先采用单晶碳化硅纳米纤维为原料，利用化学气相沉积法在纤维表面沉积界面层；将含界面层的纳米纤维分散造浆，经抄浆造纸工艺制备三维网络结构的SiC纳米纤维纸；将上述纤维纸放入含烧结助剂、碳化硅粉体、分散剂的纳米浆料中真空浸渍；待真空浸渍完全后，将SiC预浸带/片取出干燥，然后将干燥后的预浸带/片在模具中进行叠层模压成型；将成型后的预制体放入石墨模具中热压烧结完成制备。本发明与传统的碳化硅陶瓷相比，具有更高的断裂韧性和强度，对于探索新型SiCf/SiC复合材料具有重要意义。
Method for preparing monocrystalline silicon carbide nanofiber/silicon carbide ceramic-based composite material through nano-impregnation transient eutectic
一种纳米浸渍瞬态共晶制备单晶碳化硅纳米纤维/碳化硅陶瓷基复合材料的方法
CHEN JIANJUN (Autor:in) / YANG JIAHAO (Autor:in) / LI HAOLIN (Autor:in) / XIONG YILIAN (Autor:in) / ZHU MINGMING (Autor:in) / TAO JIYU (Autor:in)
15.07.2022
Patent
Elektronische Ressource
Chinesisch
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