Jute fibers and powderized hazelnut shells as natural fillers in non-asbestos organic non-metallic friction composites

• Published in: Materials in engineering Vol. 51; pp. 847 - 853
• Main Authors: Matějka, Vlastimil, Fu, Zhezhen, Kukutschová, Jana, Qi, Shicheng, Jiang, Shengling, Zhang, Xiaoa, Yun, Rongping, Vaculík, Miroslav, Heliová, Marie, Lu, Yafei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2013
• Subjects: Friction composite; Friction surface characterization; Friction-wear properties; Natural fillers; Friction-wear properties; Friction surface characterization; Natural fillers; Friction composite
• ISSN: 0261-3069
• DOI: 10.1016/j.matdes.2013.04.079

•Friction performance of composites with jute fibers and hazelnut shells are tested.•Composites with jute fibers show fade phenomenon at higher temperatures.•Addition of hazelnut shells improve the stability of the friction coefficient. The paper addresses the potential application of jute fibers in combination with powderized hazelnut shells as natural and biodegradable fillers in non-asbestos organic (NAO) friction composites. Two groups of the samples, based on a combination of jute fibers and graphite as a solid lubricant, and the jute containing samples where graphite is replaced with hazelnut shells, were prepared. Friction-wear properties of the prepared samples were evaluated using the CHASE tester according to the SAE J661 recommendation. The friction-wear tests revealed the jute with graphite samples to show significant fade phenomenon if the temperature during the second fade test increases above 300°C. The samples belonging to the jute with hazelnut shells group show better resistance against the fade phenomenon even at temperatures higher than 300°C. Based on the comparison of the overall friction performance, the composite with 5.6vol.% of jute fibers and 8.4vol.% of powderized hazelnut shells (assigned as JH-5.6) was selected as the best performing, and this composite contains 14vol.% of natural, renewable and biodegradable components. If we accept that the maximum temperature during braking will be up to 290°C then the composite with 23.6vol.% of jute fibers and 6.3vol.% of powderized hazelnut shells (assigned as JH-23.6) shows an acceptable stability of the friction coefficient, whereas this composite contains almost 30vol.% of natural, renewable and biodegradable components.