| Autor: |
SONG Jie-guang, YANG Xue-qing, WU Chun-xiao, LUO Hui-hui, HE Chun-yan, LIN Guo-jian, GUAN Zhi-qiang, WANG Rui-hua, CHEN Ai-xia |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Fenmo yejin jishu, Vol 39, Iss 1, Pp 62-68 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1001-3784 |
| DOI: |
10.19591/j.cnki.cn11-1974/tf.2019090001 |
| Popis: |
To overcome the difficulty in the uniform phase distribution, wetting interface, and sintering densification of the cermets, the reinforced phases were uniformly wrapped and distributed on the surface of the base materials by ball-milling technology to improve the comprehensive performance of the cermets. The ball milling parameters and sintering properties of the coated SiO2/Al composite powders were investigated in this paper. The results show that, the specific surface area of the SiO2/Al composite powders increases first and then decreases with the extension of the milling time, and the specific surface area of the SiO2/Al composite powders shows the largest and reaches 8.1 m2·g−1 by ball milling for 6 h. The specific surface area of the SiO2/Al composite powders increases first and then decreases with the increase of the ball-to-material ratio, indicating that the SiO2 content coated on the surface of Al powders increases first and then decreases. With the increase of milling speed, the specific surface area of the SiO2/Al composite powders increases first and then decreases. With the increase of sintering temperature, the surface hardness of the SiO2/Al cermets increases first and then decreases. When the sintering temperature is 900 ℃, the surface hardness of the SiO2/Al cermets reaches the highest. The better properties of the SiO2/Al cermets are obtained when the ball milling time is 6 h, the ball-to-materials ratio is 2:1, the ball milling speed is 360 r·min−1, and the sintering temperature is 900 ℃. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
