Formation of Void in BFS/CaCO3 Diffusion Couple

Ahmad Abdul Mun'im Ismail; Alya Naili Rozhan; Muhammad Rafiq Haikal Rosdin; Hadi Purwanto; Abd Malek Abdul Hamid; M. H. Ani

doi:10.31436/iiumej.v26i3.3603

Authors

Ahmad Abdul Mun'im Ismail International Islamic University Malaysia https://orcid.org/0009-0002-0099-1994
Alya Naili Rozhan International Islamic University Malaysia https://orcid.org/0000-0002-7700-4494
Muhammad Rafiq Haikal Rosdin International Islamic University Malaysia
Hadi Purwanto Universitas International Semen Indonesia https://orcid.org/0000-0001-6995-9998
Abd Malek Abdul Hamid International Islamic University Malaysia
M. H. Ani International Islamic University Malaysia https://orcid.org/0000-0003-2616-8218

DOI:

https://doi.org/10.31436/iiumej.v26i3.3603

Keywords:

void formation, diffusion couple, blast furnace slag, calcium carbonate

Abstract

This study investigates void formation in the blast furnace slag (BFS) and calcium carbonate (CaCO₃) diffusion couple, which is critical for understanding the interdiffusion process in cement production. The experimental analysis involved high-temperature diffusion experiments, focusing on the volume fraction of void at the BFS/CaCO₃ interface, the activation energy of void formation, and the I-V measurement of void formation at the BFS/CaCO₃ interface. Void measurements revealed a 25% increase after exposure to the specified temperature, while the activation energy for void formation was calculated to be – 41.48 kJ/mol. I-V measurements revealed ionic diffusion as the dominant mechanism for void formation, with an average decomposition rate of 1.4598 ´ 10^-12 m²s^-1. These findings provide valuable insights for utilizing BFS in cement production.

ABSTRAK: Kajian ini menyelidik pembentukan rongga dalam pembentukan sanga relau letupan (BFS) dan kalsium karbonat (CaCO?), di mana ianya sangat penting bagi memahami proses antara resapan (interdiffusion) dalam pengeluaran simen. Analisis eksperimen melibatkan ujian resapan pada suhu tinggi, dengan tumpuan kepada pecahan isipadu rongga antara permukaan BFS/CaCO?, tenaga pengaktifan bagi pembentukan rongga, dan pengukuran I-V bagi pembentukan rongga antara muka BFS/CaCO?. Pengukuran rongga menunjukkan peningkatan sebanyak 25% selepas terdedah kepada suhu yang ditetapkan, manakala tenaga pengaktifan bagi pembentukan rongga dikira sebanyak –41.48 kJ/mol. Pengukuran I-V menunjukkan bahawa penyebaran ionik merupakan mekanisme dominan bagi pembentukan rongga, dengan kadar penguraian purata sebanyak 1.4598 × 10?¹² m²/s. Dapatan ini memberikan pemahaman penting bagi penggunaan BFS dalam pengeluaran simen.

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