Effect of extraction of rice husk-based SiO2 and it's content on performance of copper-based friction materials

被引：0
|
作者：
Wang L. [1 ]
Chen Y. [1 ]
Zhao M. [1 ]
Wu J. [1 ]
Wang Z. [1 ]
Ma H. [1 ]
Zhou J. [1 ]
机构：
[1] College of Materials Science and Engineering, Nanjing Forestry University, Nanjing
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 08期
关键词：
Copper-based friction material; Corrosion; Density; Gasified rice husk carbon; Hardness; Silica;
D O I：
10.16085/j.issn.1000-6613.2020-1892
中图分类号：
学科分类号：
摘要：
In order to provide valuable data for further utilization of SiO2 based on gasified rice husk carbon (RHC-SiO2) from gasified rice husk carbon (RHC), this study used K2CO3 to extract RHC-SiO2 from RHC, and then RHC-SiO2/crystalline SiO2 (C-SiO2)/RHC-SiO2 and C-SiO2 mixed in equal proportion (RC-SiO2) as the friction component, electrolytic copper powder as the matrix, graphite and molybdenum disulfide as the solid lubricant to prepare copper-based friction materials. The effect of the amount of RHC-SiO2, C-SiO2 and RC-SiO2 added on the density and surface hardness of copper-based friction materials were investigated, as well as metallographic preparation by grinding and corrosion, observation and analysis of material distribution on the surface of materials. The results showed that the specific surface area of RHC-SiO2 was 135.532m2/g and the mesopores around 5nm were significantly developed. After it sintered at 950℃ for 4h, the surface shrank and agglomerated, and a sinter neck appeared, which tended to crystallize. The density of copper-based friction materials gradually decreased as the amount of RHC-SiO2, C-SiO2, and RC-SiO2 added increased. However, the reduction of RHC-SiO2 was more significant than that of C-SiO2. Its surface hardness (64.6HV) was significantly improved (43.33%) compared to the base material added by the frictionless component at the amount of RHC-SiO2 of 10%. C-SiO2 acted as a pinning friction pair in the material, preventing frictional movement and increasing the coefficient of friction, while RHC-SiO2 acted as pinning. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：4397 / 4405
页数：8
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