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High-strength and high-toughness silicon carbide ceramic material and preparation method thereof
The invention provides a high-strength and high-toughness silicon carbide ceramic material and a preparation method thereof, and belongs to the technical field of silicon carbide ceramics. The invention provides a preparation method of a high-strength and high-toughness silicon carbide ceramic material, which comprises the following steps: mixing SiC powder, graphite powder, a dispersant, a binder and a solvent, and carrying out ball milling to obtain mixed slurry; carrying out spray granulation on the mixed slurry to obtain composite powder; molding the composite powder to obtain a ceramic biscuit; degreasing the ceramic biscuit to obtain a degreased biscuit; and siliconizing the degreased biscuit to obtain the high-strength and high-toughness silicon carbide ceramic material. By calculating the siliconizing amount, the siliconizing amount reacts with part of graphite to completely generate silicon carbide, redundant graphite serves as a second phase to be reserved in SiC ceramic to improve the self-lubricating performance of the material, and finally the high-strength and high-toughness silicon carbide ceramic material is obtained.
本发明提供了一种高强、高韧性的碳化硅陶瓷材料及其制备方法，属于碳化硅陶瓷技术领域。本发明提供了一种高强、高韧性的碳化硅陶瓷材料的制备方法，包括以下步骤：将SiC粉体、石墨粉、分散剂、粘结剂和溶剂混合，进行球磨，得到混合浆料；将所述混合浆料进行喷雾造粒，得到复合粉体；将所述复合粉体进行成型，得到陶瓷素坯；将所述陶瓷素坯进行脱脂，得到脱脂素坯；将所述脱脂素坯进行渗硅，得到高强、高韧性的碳化硅陶瓷材料。本发明通过计算渗硅的量使其与部分石墨反应全部生成碳化硅，多余的石墨作为第二相保留在SiC陶瓷中提高材料的自润滑性能，最终得到高强、高韧性的碳化硅陶瓷材料。
High-strength and high-toughness silicon carbide ceramic material and preparation method thereof
The invention provides a high-strength and high-toughness silicon carbide ceramic material and a preparation method thereof, and belongs to the technical field of silicon carbide ceramics. The invention provides a preparation method of a high-strength and high-toughness silicon carbide ceramic material, which comprises the following steps: mixing SiC powder, graphite powder, a dispersant, a binder and a solvent, and carrying out ball milling to obtain mixed slurry; carrying out spray granulation on the mixed slurry to obtain composite powder; molding the composite powder to obtain a ceramic biscuit; degreasing the ceramic biscuit to obtain a degreased biscuit; and siliconizing the degreased biscuit to obtain the high-strength and high-toughness silicon carbide ceramic material. By calculating the siliconizing amount, the siliconizing amount reacts with part of graphite to completely generate silicon carbide, redundant graphite serves as a second phase to be reserved in SiC ceramic to improve the self-lubricating performance of the material, and finally the high-strength and high-toughness silicon carbide ceramic material is obtained.
本发明提供了一种高强、高韧性的碳化硅陶瓷材料及其制备方法，属于碳化硅陶瓷技术领域。本发明提供了一种高强、高韧性的碳化硅陶瓷材料的制备方法，包括以下步骤：将SiC粉体、石墨粉、分散剂、粘结剂和溶剂混合，进行球磨，得到混合浆料；将所述混合浆料进行喷雾造粒，得到复合粉体；将所述复合粉体进行成型，得到陶瓷素坯；将所述陶瓷素坯进行脱脂，得到脱脂素坯；将所述脱脂素坯进行渗硅，得到高强、高韧性的碳化硅陶瓷材料。本发明通过计算渗硅的量使其与部分石墨反应全部生成碳化硅，多余的石墨作为第二相保留在SiC陶瓷中提高材料的自润滑性能，最终得到高强、高韧性的碳化硅陶瓷材料。
High-strength and high-toughness silicon carbide ceramic material and preparation method thereof
一种高强、高韧性的碳化硅陶瓷材料及其制备方法
GAO JINDONG (author) / JIAN WUBING (author) / ZHENG QINGYANG (author) / XU WENXUE (author)
2024-01-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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