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Development of materials criticality profiling methodology at product level

Abstract : Rare earth crisis in 2010 showed the importance of some materials and whipped up interest in the research on material criticality. A review work was first conducted in order to get a better understanding of the existing work in this research area and to see where more work is needed. Based on this review, three research gaps were identified (lack of a comprehensive diagnosis of criticality; lack of evaluation methodology at the product level; lack of links between the mechanism of criticality, the evaluation methodology and the solutions offered. This thesis focuses on the two first research gaps and offers several ideas for the last one. Regarding diagnosis of criticality, the mechanism is illustrated under four dimensions: imbalance between supply and demand, importance of the material to product, supply accessibility and dynamic factors. A definition of criticality is also put forward. Considering the established mechanism as research core, a methodology to evaluate the criticality of materials at the product level has been developed and is completed with a concrete and quantitative model. The methodology offers guidance on how to assess criticality and sets a framework for evaluation. The model illustrates a way to use this methodology through a tool that assigns a ‘criticality score’ to materials and shows how the score is contributed. The calculations were automated in Excel. Two applications, one for permanent magnet and the other for light emitting diode, were conducted to demonstrate and improve the methodology and the model
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2017TROY0004_Yanya_Jin.pdf
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  • HAL Id : tel-02414239, version 1

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Yanya Jin. Development of materials criticality profiling methodology at product level. Economics and Finance. Université de Technologie de Troyes, 2017. English. ⟨NNT : 2017TROY0004⟩. ⟨tel-02414239⟩

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