CD Skripsi
Pemanfaatan Hasil Isolasi Silika Lempung Alam Desa Gema Dengan Metode Alkali Fusion Sebagai Bahan Penyusun Kampas Rem
Natural clay is an abundant mineral resource in Indonesia. Natural clays have different mineral contents. Natural clay in Gema Village contains high silicon dioxide (SiO₂). This study utilizes the isolation of natural clay silica through the alkali fusion method. The alkali fusion method is used to obtain high purity silica. This process uses HCl 2 M, 6 M and NaOH 3 M to minimize existing impurities, so that the resulting silica becomes purer. Characterization of natural clays was carried out x-rays fluoresence (XRF) testing and thermal gravimetry analysis (TGA) testing. The results of natural clay silica isolation are used as abrasive material for brake lining with variations in the percentage of volume fraction of constituent materials: natural clay silica (100:0; 98:2; 96:4; and 94:6%). The mixing process of the constituent materials was carried out for 5 minutes. The powder mixture was compressed at a pressure of 5 tons, temperature 165°C for 15 minutes. The samples were then postcured at 165°C for 10 hours. Samples were tested for friction coefficient and specific wear rate based on SNI 09-0143-1987 standard. XRF test results, silica content before alkali fusion treatment 53.7% after treatment 82.1%. TGA test results showed good heat resistance with a mass decrease of 3.53%. The test results of friction coefficient and specific wear rate showed that the average value of friction coefficient increased along with the addition of natural clay volume fraction, while the specific wear rate increased in samples B, C and D increased along with the addition of natural clay volume fraction. Based on the SNI 09-0143-1987 standard, samples A, B, C and D have the potential as brake linings for class 1A, 1B and 2 vehicle classifications.
Keywords: brake lining, natural clay, XRF, friction coefficient, wear rate
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