公开(公告)号：KR1020030070752A

公开(公告)日：2003-09-02

申请号：KR1020020010276

申请日：2002-02-26

Applicant: 한국과학기술원

Inventor： 홍순형 ,  이효수 ,  김경태

IPC: C04B35/565 ,  C04B38/06

CPC classification number: C04B35/565 ,  C04B35/6303 ,  C04B35/63468 ,  C04B35/6365 ,  C04B38/06 ,  C04B2111/40 ,  C04B2235/3826

Abstract: PURPOSE: Provided is a simple production method of porous SiC preforms satisfying initial volume fraction by ball-milling and pressing the mixture of SiC, polymer former and additives. CONSTITUTION: The porous SiC preforms used in metal matrix composite is produced by the following steps of: ball milling SiC powder, polymer former, ethyl cellulose(400-500micrometer), and additives such as an inorganic binder, flocculant (polyacryl amide) and water, wherein the volume fraction of SiC and ethyl cellulose is 1:0.9 - 1:1.6 and at least 30wt.% of polyacryl amide is added; pressing the prepared slurry to decrease the moisture content of the slurry; drying through at least two steps of natural and forced (oven at 100deg.C) drying; heating over 1100deg.C at a rate of 5deg.C/min, except for the range of 250-450deg.C at a rate of 2deg.C/min.

Abstract translation: 目的：提供通过球磨和压制SiC，聚合物成型剂和添加剂的混合物来满足初始体积分数的多孔SiC预制件的简单制备方法。 构成：用于金属基体复合材料的多孔SiC预制件通过以下步骤制备：球磨SiC粉末，聚合物成型剂，乙基纤维素（400-500微米）和添加剂如无机粘合剂，絮凝剂（聚丙烯酰胺）和水 ，其中SiC和乙基纤维素的体积分数为1:0.9-1:1.6，并且加入至少30重量％的聚丙烯酰胺; 压制制备的浆料以降低浆料的含水量; 干燥至少两步，天然和强制（烘箱在100℃）干燥; 以5℃/分钟的速度加热1100℃以上，除了250-450℃的范围外，以2℃/分钟的速度加热。