Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-density silicon carbide ceramic composite material
The invention discloses a preparation method of a high-density silicon carbide ceramic composite material. The preparation method comprises the following steps of: S1, putting silicon carbide powder,carbon black, boron nitride nanosheets and a combustion assistant into a grinder, carrying out wet ball-milling mixing, drying, and screening to obtain mixed powder; S2, carrying out compression molding on the mixed powder by adopting a cold isostatic pressing molding process to obtain a biscuit; S3, performing pressureless vacuum sintering on the biscuit so as to obtain a presintered body; and S4, performing spark plasma sintering on the presintered body to obtain the silicon carbide ceramic composite material. According to the preparation method, wet ball-milling mixing is performed on the raw materials in a reasonable ratio to obtain the mixed powder; compression molding is performed on the mixed powder by adopting the cold isostatic pressing process to obtain the biscuit with relatively high density; and the biscuit issintered through a pressureless sintering and spark plasma sintering combined manner; and therefore, the preparation of the high-density, high-hardness and high-strength silicon carbide ceramic composite material is realized. The method is simple in process and convenient for industrial production.
本发明公开了一种高致密度的碳化硅陶瓷复合材料的制备方法，该制备方法包括以下步骤：S1、将碳化硅粉体、炭黑、氮化硼纳米片以及燃烧助剂置于研磨机中进行湿法球磨混合，干燥，过筛，得到混合粉体；S2、采用冷等静压成型工艺将混合粉体压制成型，得到素坯；S3、将素坯进行无压真空烧结，得到预烧体；S4、将预烧体进行放电等离子烧结，得到碳化硅陶瓷复合材料。本发明将合理配比的各个原料采用湿法球磨混合得到混合粉体，然后采用冷等静压工艺将混合粉体压制成型得到较高致密度的素坯，再通过无压烧结和放电等离子烧结结合的方式对素坯烧结，实现了高致密度、高硬度、高强度碳化硅陶瓷复合材料的制备；本发明方法工艺简单，便于工业化生产。
Preparation method of high-density silicon carbide ceramic composite material
The invention discloses a preparation method of a high-density silicon carbide ceramic composite material. The preparation method comprises the following steps of: S1, putting silicon carbide powder,carbon black, boron nitride nanosheets and a combustion assistant into a grinder, carrying out wet ball-milling mixing, drying, and screening to obtain mixed powder; S2, carrying out compression molding on the mixed powder by adopting a cold isostatic pressing molding process to obtain a biscuit; S3, performing pressureless vacuum sintering on the biscuit so as to obtain a presintered body; and S4, performing spark plasma sintering on the presintered body to obtain the silicon carbide ceramic composite material. According to the preparation method, wet ball-milling mixing is performed on the raw materials in a reasonable ratio to obtain the mixed powder; compression molding is performed on the mixed powder by adopting the cold isostatic pressing process to obtain the biscuit with relatively high density; and the biscuit issintered through a pressureless sintering and spark plasma sintering combined manner; and therefore, the preparation of the high-density, high-hardness and high-strength silicon carbide ceramic composite material is realized. The method is simple in process and convenient for industrial production.
本发明公开了一种高致密度的碳化硅陶瓷复合材料的制备方法，该制备方法包括以下步骤：S1、将碳化硅粉体、炭黑、氮化硼纳米片以及燃烧助剂置于研磨机中进行湿法球磨混合，干燥，过筛，得到混合粉体；S2、采用冷等静压成型工艺将混合粉体压制成型，得到素坯；S3、将素坯进行无压真空烧结，得到预烧体；S4、将预烧体进行放电等离子烧结，得到碳化硅陶瓷复合材料。本发明将合理配比的各个原料采用湿法球磨混合得到混合粉体，然后采用冷等静压工艺将混合粉体压制成型得到较高致密度的素坯，再通过无压烧结和放电等离子烧结结合的方式对素坯烧结，实现了高致密度、高硬度、高强度碳化硅陶瓷复合材料的制备；本发明方法工艺简单，便于工业化生产。
Preparation method of high-density silicon carbide ceramic composite material
一种高致密度的碳化硅陶瓷复合材料的制备方法
DUAN SHENZHEN (Autor:in)
29.01.2021
Patent
Elektronische Ressource
Chinesisch
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