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发明公开
CN104045377A 一种用于碳/碳复合材料涂层的粉末制备方法 无效 - 撤回

一种用于碳/碳复合材料涂层的粉末制备方法
摘要：
一种用于碳/碳复合材料涂层的粉末制备方法，其特征是由以下步骤组成：将质量比为50~70:30~50的ZrB2和MoSi2混合后；按ZrB2和MoSi2混合粉与粘结剂聚乙烯吡咯烷酮质量比为90~97:3~10混合；再加入其混合粉质量比为1~1.5:1的去离子水，球磨24~32h，得到浆料；将浆料搅拌，喷雾干燥，得到造粒粉；将造粒粉，在温度1200~1400℃下烧结，烧结时间为1~2h；将烧结后的粉末过325目筛，得到喷涂用的ZrB2-MoSi2复合粉末。本发明方法制备的ZrB2-MoSi2复合粉末流动性为≤40s/50g，松装密度为≤2.6~3.5g/cm3；所制备的涂层孔隙率为6~12%。
摘要（英）：

The invention discloses a powder preparation method for carbon/carbon composite coatings. The method is characterized by comprising the following steps: after ZrB2 and MoSi2 are mixed in a mass ratio of 50-70:30-50, mixing the ZrB2-MoSi2 mixed powder with a binder polyvinylpyrrolidone in a mass ratio of 90-97:3-10; adding deionized water into the obtained mixed powder according to a mass ratio of 1-1.5:1, and ball-milling the obtained mixture for 24-32h so as to obtain slurry; stirring the slurry, and carrying out spray drying on the slurry so as to obtain granulation powder; sintering the granulation powder for 1-2h at a temperature of 1200-1400 DEG C; and sieving the sintered powder by using a 325-mesh sieve so as to obtain ZrB2-MoSi2 composite powder to be sprayed. The liquidity of the ZrB2-MoSi2 composite powder prepared according to the method disclosed by the invention is less than or equal to 40s/50g, and the apparent density of the ZrB2-MoSi2 composite powder is less than or equal to 2.6-3.5 g/cm<3>; and the porosity of the prepared coating is 6-12%.

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