Pengaruh Waktu Pencampuran terhadap Kekerasan Vickers Material Crucible Berbahan Limbah Evaporation Boats, Kaolin dan Semen Tahan Api

Abstract

Evaporation boat waste contains Boron Nitride (BN) and Titanium Diboride (TiB2) so that it has electrically conductive properties with high resistance to chemicals and heat. In addition, the combination of these materials has high thermal conductivity properties with a melting point of up to 2700oC and has an oxidation resistance of up to 1000oC so it is very suitable if applied to crucibles, or refractory. The purpose of this study was to determine the effect of mixing duration on the hardness of the crucible material made from a mixture of evaporation boats waste, kaolin and fire mortar SK-34. The mixing process of evaporation boats waste, kaolin and refractory cement is carried out using a mixer machine with a duration of 30, 60 and 90 minutes. The compaction process was carried out on the mixture with a force of 40 kg/cm2 to produce a cylindrical test specimen. After seven days, the specimens were sintered at 1000oC for 2 hours. The hardness test process was carried out with the FM-800 microhardness tester machine to determine the effect of mixing duration on the final product hardness. The highest hardness of 37,2 HV was found in the final product with a mixing duration of 90 minutes. The hardness of final product is increasing with an increase in mixing duration.

The Potential of Evaporation Boats Waste as a Crucible Material for Casting: A Review

“…Research Focus Results [30] Made an invention related to the method for making metal smelting crucibles from evaporation boat waste and has been patented with patent number IDS000004495 regarding the best composition of crucible materials, namely evaporation boat waste (50%), graphite materials (25%), and kaolin materials (25%). In addition, the crucible material is given thermal shock treatment to determine the impact resistance value of the crucible.…”

“…Based on the results of the analysis of thermal shock, heating or cooling quickly can cause a failure of the strength of the material due to damage to the atomic structure due to heat shock and high heat exceeding the strength of the material. https://doi.org/10.51630/ijes.v5i1.95 40 [34] Conduct experimental analysis on the effect of mixing time on the hardness of Vickers crucible materials made from evaporation boat waste, kaolin, and refractory cement. Mixing materials is necessary so that the process of mixing crucible materials becomes more homogeneous and prevents the failure of the crucibles.…”

Pengaruh Durasi Pencampuran Terhadap Mechanical Properties Crucible Peleburan Aluminium

“…Pada penelitian ini proses sintering dilakukan pada suhu 1000°C selama 2 jam didalam furnace atau tungku pemanas seperti yang ditunjukan pada Gambar 2.17. Semakin homogen material yang tercampur selama proses mixing, maka kekerasan material yang dihasilkan semakin besar (Kargul et al, 2018;Triyanto et al, 2021). Ketika campuran serbuk memiliki distribusi ukuran partikel yang seragam dengan tingkat homogenitas yang tinggi digunakan sebagai bahan baku pada pembuatan komposit atau keramik, akan menghasilkan mechanical strength yang tinggi dan struktur mikro yang terdistribusi secara homogen (Oh et al, 1998).…”