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<p>The corrosion failure of a crucible made of 95 wt% Zr in tin ore smelting applications was investigated. The Zr crucibles degraded after a high-temperature firing process involving alkaline fusion such as Na<sub>2</sub>CO<sub>3</sub>, NaOH and sulfur. An analysis was conducted to determine the corrosion failure mechanism and the strength degradation. The research was conducted by taking samples of zirconium metal crucibles that had undergone either 1000 min of accumulated firing or 100 cycles of firing, and then comparing them to new ones. Micro-Vickers hardness testing and tensile testing were carried out. SEM observed microstructures, while XRD analysis was conducted to observe phase composition. The results showed that pitting and cracking damage caused a decreased tensile strength (UTS) by 52% while the strain decreased by 22%. The deposition of several oxygen atoms, based on EDS results confirmed by XRD as a ZrO<sub>2</sub> compound, causes the material to embrittle and makes the crucible unable to maintain its original shape.</p>

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Investigation on the failure of a 95 wt% zirconium alloy crucible as an alkaline fusion reactor

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • Shokhul Lutfi,
  • Muhammad Robby Firmansyah,
  • Wahyu Bambang Widayatno,
  • Agus Sukarto Wismogroho,
  • Muhammad Ikhlasul Amal,
  • Jayadi,
  • Muhammad Gading Permadi,
  • Felli Rusumayanti,
  • Destia Nurika,
  • Febiyanto

摘要

The corrosion failure of a crucible made of 95 wt% Zr in tin ore smelting applications was investigated. The Zr crucibles degraded after a high-temperature firing process involving alkaline fusion such as Na2CO3, NaOH and sulfur. An analysis was conducted to determine the corrosion failure mechanism and the strength degradation. The research was conducted by taking samples of zirconium metal crucibles that had undergone either 1000 min of accumulated firing or 100 cycles of firing, and then comparing them to new ones. Micro-Vickers hardness testing and tensile testing were carried out. SEM observed microstructures, while XRD analysis was conducted to observe phase composition. The results showed that pitting and cracking damage caused a decreased tensile strength (UTS) by 52% while the strain decreased by 22%. The deposition of several oxygen atoms, based on EDS results confirmed by XRD as a ZrO2 compound, causes the material to embrittle and makes the crucible unable to maintain its original shape.