TY  - JOUR
TI  - Processing and Characterization of Sepiolite Clay Containing Composites for Organic Brake Pad Application
AB  - Brake friction materials are crucial in transportation means. Organic brake pads are widely used in railway or automotive especially due to their low manufacturing cost compared to semi-metallic or ceramic pads. Owing to the complex requirements of brake lining systems, organic composite brake pads are a mixture of various components and are basically composed of binders, friction modifiers, fibers, lubricants, abrasives and various fillers. The choice of functional fillers and the optimization of the formulation is essential for improving the performances of these materials. Studies on the use of clay minerals such as kaolin or montmorillonite show that these fillers are effective. Therefore, in this study, a clay mineral, sepiolite was chosen. The composite samples prepared in this work are composed of Novolac resin as binder, cashew nut shell oil, ceramic fibers, glass fibers and other fillers. This study aims to explore the effect of sepiolite clay on the processing and on properties such as the density, the porosity or the hardness of the samples. Therefore, composite samples containing different amounts of sepiolite clay (5 wt. %, 10 wt. %, 15 wt. % and 20 wt. %) were prepared. For this purpose, the different components were mixed in a high speed mixer and pressed in a hot press at 160°C. Then, a post curing step at 180°C was applied. The density of the samples was determined and decreases from 2.22 g/cm3 to 2.10 g/cm3 with increasing sepiolite clay content. The porosity decreases from 4.47 % to 2.05% with increasing clay content until 15% and rises again to 2.81% with 20% of sepiolite content. Shore D hardness follows an inverse tendency to the density and rises from 85.3 to 90.8.
AU  - ORAL, Bora
AU  - AKKOYUN, Serife
DO  - 10.31590/ejosat.818408
PY  - 2020
JO  - Avrupa Bilim ve Teknoloji Dergisi
VL  - 0
IS  - Ejosat Özel Sayı 2020 (ISMSIT)
SN  - 2148-2683
SP  - 89
EP  - 94
DB  - TRDizin
UR  - http://search/yayin/detay/484935
ER  -