Influence of Sn Addition on the Ignition Resistance and Microstructural Evolution of Non-Flammable Mg-9Al-0.8Zn-0.1Mn-0.3Ca-0.2Y Alloy

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-11-20 DOI:10.1007/s12540-024-01851-1

Yohan Go, Young Min Kim

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Abstract

This study investigates the influence of tin (Sn) addition on the ignition resistance and microstructural evolution of Mg-9Al-0.8Zn-0.1Mn-0.3Ca-0.2Y (AZXW9100) magnesium alloy. The AZXW9100 alloy without Sn exhibited a high ignition temperature of approximately 720 °C, significantly exceeding the melting point of magnesium, indicating superior ignition resistance. However, with increasing Sn content, the ignition temperature decreased, with the AZXW9100-4Sn alloy showing a reduction of about 120 °C. Microstructural analysis revealed that calcium (Ca) in the Mg₁₇Al₁₂ phase improves thermal stability and ignition resistance by forming protective oxide layers such as MgO, MgAl₂O₄, and CaO. However, Sn addition promotes the formation of the MgSnCa phase, depleting Ca from the Mg₁₇Al₁₂ phase, resulting in reduced thermal stability. High-temperature oxidation experiments further confirmed that increased Sn content leads to the formation of low-melting phases, accelerating oxidation and lowering the ignition temperature. These findings suggest that while Sn addition can enhance certain mechanical properties, it negatively affects ignition resistance when present in excess. To optimize the performance of AZXW-series alloys, particularly for safety–critical applications, careful control of both Sn and Ca content is essential.

Graphical Abstract

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Sn添加对不燃Mg-9Al-0.8Zn-0.1Mn-0.3Ca-0.2Y合金耐燃性及组织演变的影响

研究了添加锡（Sn）对Mg-9Al-0.8Zn-0.1Mn-0.3Ca-0.2Y （AZXW9100）镁合金耐火性和组织演变的影响。不含Sn的AZXW9100合金的着火温度高达720℃左右，明显超过镁的熔点，具有较好的耐着火性能。随着Sn含量的增加，着火温度降低，AZXW9100-4Sn合金的着火温度降低约120℃。微观结构分析表明，Mg₁₇Al₁₂相中的钙（Ca）通过形成MgO、MgAl₂O₄和CaO等保护性氧化层，提高了热稳定性和耐燃性。然而，Sn的加入促进了MgSnCa相的形成，从Mg₁₇Al₁₂相中消耗Ca，导致热稳定性降低。高温氧化实验进一步证实了Sn含量的增加导致了低熔点相的形成，加速了氧化，降低了着火温度。这些发现表明，虽然添加锡可以提高某些机械性能，但过量添加锡会对耐燃性产生负面影响。为了优化azxw系列合金的性能，特别是在安全关键应用中，仔细控制Sn和Ca含量是必不可少的。图形抽象

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.