公开(公告)号：US20190210930A1

公开(公告)日：2019-07-11

申请号：US16311984

申请日：2017-06-22

申请人： Universität Bayreuth

发明人： Stefan KNOHL ,  Walter KRENKEL ,  Georg PUCHAS ,  Thomas WAMSER

IPC分类号： C04B35/80 ,  C04B35/628 ,  C04B35/626 ,  C04B35/64 ,  C04B37/00 ,  B32B18/00 ,  B32B5/02

CPC分类号： C04B35/803 ,  B32B5/022 ,  B32B18/00 ,  B32B2262/10 ,  C04B35/111 ,  C04B35/119 ,  C04B35/14 ,  C04B35/185 ,  C04B35/44 ,  C04B35/486 ,  C04B35/4885 ,  C04B35/505 ,  C04B35/52 ,  C04B35/565 ,  C04B35/6264 ,  C04B35/62852 ,  C04B35/62855 ,  C04B35/62886 ,  C04B35/632 ,  C04B35/63488 ,  C04B35/64 ,  C04B35/806 ,  C04B37/001 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3244 ,  C04B2235/522 ,  C04B2235/5224 ,  C04B2235/5228 ,  C04B2235/5236 ,  C04B2235/524 ,  C04B2235/5244 ,  C04B2235/5256 ,  C04B2235/526 ,  C04B2235/602 ,  C04B2235/616 ,  C04B2235/764 ,  C04B2237/343 ,  C04B2237/348 ,  C04B2237/38

摘要： A prepreg for a ceramic matrix composite, a process for the preparation of a green body with the help of the prepreg, and a process for the preparation of the ceramic matrix composite from the green body prepared according to the present invention are provided. The inventive process comprises the following steps: a) impregnating an arrangement of ceramic fibers with a slurry, which slurry comprises the following components: (i) 10 to 40 vol.-%, based on the total volume of the slurry, of ceramic particles, (ii) an alcoholic organic solvent selected from: (ii-1) 21 to 35 wt.-%, based on the total weight of the ceramic particles in the slurry, of glycerol, (ii-2) 10 to 35 wt.-%, based on the total weight of the ceramic particles in the slurry, of an oligo or polyethylene glycol with an average molecular weight of at most 800 g/mol, (ii-3) 10 to 35 wt.-%, based on the total weight of the ceramic particles in the slurry, of at least one C2-C6 alkane diol, and (ii-4) 10 to 35 wt.-%, based on the total weight of the ceramic particles in the slurry, of a mixture of two or more components, selected from a C2-C6 alkane diol, an oligo or polyethylene glycol with an average molecular weight of at most 800 g/mol, and glycerol; and (iii) water; b) reducing the water content in the slurry in the impregnated fiber arrangement to obtain a prepreg for a ceramic matrix composite; c) providing a shaped composite material from one or more prepregs obtained according to step b); d) consolidating the shaped composite material by reducing the water content and the content of alcoholic organic solvent so that a green body is obtained.