#TITLE_ALTERNATIVE#

• Main Author: ARYO. B (NIM : 13706007); Pembimbing 1 : Dr. Ir. Husaini Ardy ; Pembimbing 2 : Dr. Eng. Budi, RAKHMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16915
• Institution: Institut Teknologi Bandung

A solid particle erosion test was performed for two types of thermal spray coatings. The first coating is a HVOF sprayed Cr3C2-NiCr coating, and the second coating used Wire Arc Sprayed Fe-WC coating, with an average coating thickness of 290 &#956;m and 1100 &#956;m respectively. The erodent used for this experiment is an angular shaped alumina particle with size of 25 mesh. Three impingement angles were used in this experiment, which are 30o, 60o, and 90o. Two main factors to be examined in this experiment is the erosion rate and erosion mechanism of both type of coatings. Weight loss data acquired from erosion test can be converted into erosion rate by dividing them to the <br /> <br /> <br /> <br /> <br /> weight of erodent used in the test. A post erosion SEM images analysis of coating surface were used to determine the erosion mechanism of both type of coatings. An additional coating impact test was performed to examine the number of impact to failure cycle and type of impact failure for both type of coating. <br /> <br /> <br /> <br /> <br /> The results shows that Cr3C2-NiCr coating have lower erosion rate thus higher erosion resistance compared to Fe-WC coating. A combination of brittle and ductile erosion mechanism was observed from SEM image of Cr3C2-NiCr coating surface, whereas a more brittle oriented erosion mechanism was seen on Fe-WC coating surface. From repeated impact test results it is concluded that the two coatings have a different type of coating impact failure, an adhesive failure for Cr3C2-NiCr coating and a cohesive failure for Fe-WC coating. The number of impact cycle to failure for Cr3C2-NiCr and Fe-WC coating are 41 and 108 cycle <br /> <br /> <br /> <br /> <br /> respectively.