Analisis Simulasi Hubungan Suhu Sintering Dengan Nilai Kekerasan Dan Kekuatan Patah Keramik Alumina

Abstract

This research uses variable sintering temperature of 1300 ⁰C, 1400 ⁰C, 1500 ⁰C and 1600 ⁰C mixed with mullite additives 0%, 10%, 15%, 20% and 25%. As parameters of the study are the vickers hardness and bending strength. In this study a computational simulation has been designed with the Matlab program to analyze the relationship between the Vickers Hardness and bending strength to the sintering temperature of alumina ceramics (Al₂O₃) with variations in the addition of mullite additives.

The best result of the hardness value which is close to the literature value is the 25 % mullite additive composition at a sintering temperature of 1600 ⁰C which is 475 kgf / mm². The best results of fracture strength values close to the literature value is the composition of the mullite additive 20% at a sintering temperature of 1600 ⁰C which is 45,800 lbf / in². From the results of simulation analysis for hardness and strength of the fractures can be obtained a constant change due to the constant increase in sintering temperature.

Keywords: Matlab, Vickers Hardness and Bending Strength, Alumina Ceramics, Mullit.