Liu Fuling, Chang Shanshan, Bai Yuanjuan, Li Xianjun, Zhou Xiaojian, Hu Jinbo
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China.
Materials (Basel). 2023 Jun 20;16(12):4487. doi: 10.3390/ma16124487.
In this study, a novel friction material with biomass-ceramic (SiC) dual matrixes was fabricated using Chinese fir pyrocarbon via the liquid-phase silicon infiltration and in situ growth method. SiC can be grown in situ on the surface of a carbonized wood cell wall by mixing and calcination of wood and Si powder. The samples were characterized using XRD, SEM, and SEM-EDS analysis. Meanwhile, their friction coefficients and wear rates were tested to study their frictional properties. To explore the influence of crucial factors on friction performance, response surface analysis was also conducted to optimize the preparation process. The results showed that longitudinally crossed and disordered SiC nanowhiskers were grown on the carbonized wood cell wall, which could enhance the strength of SiC. The designed biomass-ceramic material had satisfying friction coefficients and low wear rates. The response surface analysis results indicate that the optimal process could be determined (carbon to silicon ratio of 3:7, reaction temperature of 1600 °C, and 5% adhesive dosage). Biomass-ceramic materials utilizing Chinese fir pyrocarbon could display great promise to potentially replace the current iron-copper-based alloy materials used in brake systems.
在本研究中，采用杉木热解碳通过液相硅浸渗和原位生长法制备了一种具有生物质 - 陶瓷（SiC）双基体的新型摩擦材料。通过木材与硅粉的混合和煅烧，SiC 可在碳化木材细胞壁表面原位生长。使用 XRD、SEM 和 SEM - EDS 分析对样品进行了表征。同时，测试了它们的摩擦系数和磨损率以研究其摩擦性能。为了探究关键因素对摩擦性能的影响，还进行了响应面分析以优化制备工艺。结果表明，在碳化木材细胞壁上生长有纵向交叉且无序的 SiC 纳米 whiskers，这可以增强 SiC 的强度。所设计的生物质 - 陶瓷材料具有令人满意的摩擦系数和低磨损率。响应面分析结果表明，可以确定最佳工艺（碳硅比为 3:7、反应温度为 1600℃和粘合剂用量为 5%）。利用杉木热解碳的生物质 - 陶瓷材料有望潜在地替代当前制动系统中使用的铁 - 铜基合金材料。
